Professor Stephen Lynch
College Dean of Research and Innovation
College of Physical Sciences and Engineering
Condensed Matter and Photonics Group
School of Physics and Astronomy
- LynchSA@cardiff.ac.uk
- +44 29208 75315
- Queen's Buildings - North Building, Room N/1.21, 5 The Parade, Newport Road, Cardiff, CF24 3AA
Overview
I have a dual role within the University. I am a research active teaching academic, and I have a senior management role within the College of Physical Sciences and Engineering.
In my academic job, I teach the 2nd year core module, Introduction to Condensed Matter Physics. My research explores how electromagnetic radiation interacts with matter on timescales from picoseconds to milliseconds. I work with ultraviolet, visible, infrared, and THz light. I am also interested in the quantum optical properties of materials.
In my Dean job, I look after the College’s Research and Innovation portfolio. This covers the seven constituent academic Schools, Architecture, Chemistry, Computer Science & Informatics, Earth & Environmental Sciences, Engineering, Mathematics, and Physics & Astronomy.
Publication
2024
- James, F. L. L. et al. 2024. Blue delayed luminescence emission in neutral nitrogen vacancy containing chemical vapor deposition synthetic diamond. physica status solidi (a) – applications and materials science 221(8), article number: 2300651. (10.1002/pssa.202300651)
- Pritchett, J. D. et al. 2024. Giant microwave-optical Kerr nonlinearity via Rydberg excitons in cuprous oxide. APL Photonics 9(3), article number: 31303. (10.1063/5.0192710)
- Komies, S., Sun, J., Hodges, C., Lynch, S. A., Watson, J. S. and Lucyszyn, S. 2024. Low-cost thermal-infrared 'THz-Torch' spectroscopy. IEEE Access 12, pp. 21868-21885. (10.1109/ACCESS.2024.3359054)
2023
- Hekmati, R., Hadden, J. P., Mathew, A., Bishop, S. G., Lynch, S. A. and Bennett, A. J. 2023. Bullseye dielectric cavities for photon collection from a surface-mounted quantum-light-emitter. Scientific Reports 13(1), article number: 5316. (10.1038/s41598-023-32359-0)
2022
- Rogers, J. P. et al. 2022. High-resolution nanosecond spectroscopy of even-parity Rydberg excitons in Cu2O. Physical Review B 105(11), article number: 115206. (10.1103/PhysRevB.105.115206)
- Gallagher, L. A. P. et al. 2022. Microwave-optical coupling via Rydberg excitons in cuprous oxide. Physical Review Research 4(1), article number: 13031. (10.1103/PhysRevResearch.4.013031)
2021
- Pavlov, S. G. et al. 2021. Infrared absorption cross sections, and oscillator strengths of interstitial and substitutional double donors in silicon. Physical Review Materials 5(11), article number: 114607. (10.1103/PhysRevMaterials.5.114607)
- Dhara, S., Niang, K. M., Flewitt, A. J., Nathan, A. and Lynch, S. A. 2021. Tail state mediated conduction in zinc tin oxide thinfilm phototransistors under below bandgap optical excitation. Scientific Reports 11(1), article number: 19016. (10.1038/s41598-021-98339-4)
- Lynch, S. A. et al. 2021. Rydberg excitons in synthetic cuprous oxide (Cu2O). Physical Review Materials 5(8), article number: 86402. (10.1103/PhysRevMaterials.5.084602)
2020
- McGuinness, C. D., Wassell, A. M., Lanigan, P. M. and Lynch, S. A. 2020. Separation of natural from laboratory-grown diamond using time-gated luminescence imaging. Gems & Gemmology 56(2), pp. 220-229. (10.5741/GEMS.56.2.220)
2019
- Dhara, S., Niang, K. M., Flewitt, A. J., Nathan, A. and Lynch, S. A. 2019. Photoconductive laser spectroscopy as a method to enhance defect spectral signatures in amorphous oxide semiconductor thin- film transistors. Applied Physics Letters 114(1), article number: 11907. (10.1063/1.5070141)
2018
- Wassell, A. M. et al. 2018. Anomalous green luminescent properties in CVD synthetic diamonds. physica status solidi (a) 215(22), article number: 1800292. (10.1002/pssa.201800292)
2017
- Mandal, S. et al. 2017. Surface zeta potential and diamond seeding on gallium nitride films. ACS Omega 2(10), pp. 7275-7280. (10.1021/acsomega.7b01069)
2016
- Matmon, G., Lynch, S. A., Rosenbaum, T. F., Fisher, A. J. and Aeppli, G. 2016. Optical response from terahertz to visible light of electronuclear transitions in LiYF4:Ho3+. Physical Review B 94(20), article number: 205132. (10.1103/PhysRevB.94.205132)
2013
- Hübers, H. et al. 2013. Isotope effect on the lifetime of the 2p0 state in phosphorus-doped silicon. Physical Review B: Condensed Matter and Materials Physics 88(3), article number: 35201. (10.1103/PhysRevB.88.035201)
- Vinh, N. Q. et al. 2013. Time-resolved dynamics of shallow acceptor transitions in silicon. Physical Review X 3(1), article number: 11019. (10.1103/PhysRevX.3.011019)
- Astrov, Y. A., Lynch, S. A., Shuman, V. B., Portsel, L. M., Makhova, A. A. and Lodygin, A. N. 2013. Silicon with an increased content of monoatomic sulfur centers: Sample fabrication and optical spectroscopy. Semiconductors 47(2), pp. 247-251. (10.1134/S1063782613020048)
2012
- Nickels, P. et al. 2012. Laboratory scale water circuit including a photocatalytic reactor and a portable in-stream sensor to monitor pollutant degradation. Industrial & Engineering Chemistry Research 51(8), pp. 3301-3308. (10.1021/ie202366m)
- Hamdy, M. S. et al. 2012. Parameters controlling the photocatalytic performance of ZnO/Hombikat TiO2 composites. Journal of Photochemistry and Photobiology A: Chemistry 228(1), pp. 1-7. (10.1016/j.jphotochem.2011.11.001)
2010
- Lynch, S. A. et al. 2010. Inhomogeneous broadening of phosphorus donor lines in the far-infrared spectra of single-crystalline SiGe. Physical Review. B, Condensed Matter and Materials Physics 82(24), article number: 245206. (10.1103/PhysRevB.82.245206)
- Greenland, P. T. et al. 2010. Coherent control of Rydberg states in silicon. Nature 465(7301), pp. 1057-1061. (10.1038/nature09112)
- Lynch, S. A. et al. 2010. Quantum control of phosphorus donor rydberg states in silicon. Presented at: 7th IEEE International Conference on Group IV Photonics (GFP),, Beijing, China, 1-3 Sept. 2010.Proceedings of the 7th IEEE International Conference On Group IV Photonics, Beijing, China, 1-3 September 2010. IEEE International Conference on Group IV Photonics Piscataway, NJ: IEEE pp. 380-382., (10.1109/GROUP4.2010.5643318)
- Lynch, S. A. et al. 2010. First observation of a THz photon echo. Presented at: 35th International Conference on Infrared, Millimeter, and Terahertz Waves, Rome, Italy, 5-10 September 2010Proceedings of the 35th International Conference on Infrared Millimeter and Terahertz Waves (IRMMW-THz), Rome, Italy, 5-10 September 2010. Piscataway, NJ: IEEE pp. 1-2., (10.1109/ICIMW.2010.5612667)
2008
- Vinh, N. Q. et al. 2008. Silicon as a model ion trap: time domain measurements of donor Rydberg states. Proceedings of the National Academy of Sciences of the United States of America 105(31), pp. 10649-10653. (10.1073/pnas.0802721105)
- Zhao, M., Karim, A., Hansson, G. V., Ni, W., Townsend, P., Lynch, S. A. and Paul, D. J. 2008. Molecular beam epitaxy growth of Si/SiGe bound-to-continuum quantum cascade structures for THz emission. Thin Solid Films 517(1), pp. 34-37. (10.1016/j.tsf.2008.08.091)
- Lynch, S. A. et al. 2008. Lifetime measurements of group V donor Rydberg states in silicon at THz frequencies. Presented at: 5th IEEE International Conference on Group IV Photonics, Sorrento, Italy, 17-19 September 2008 Presented at Pavesi, L. and Priolo, F. eds.Group IV Photonics, 2008, 5th IEEE International Conference, 17-19 Sept. 2008. Los Alamitos, CA: IEEE pp. 24-26., (10.1109/GROUP4.2008.4638084)
2007
- Latkowski, S., Landais, P., Surre, F. and Lynch, S. A. 2007. CW-THz wave generation using a multimode semiconductor laser at room temperature. Presented at: LEOS 2007 - The 20th Annual Meeting of the IEEE Lasers and Electro-Optics Society, Lake Buena Vista, FL, USA, 21-25 October 2007 Presented at Golovchenko, E. and Ünlü, M. S. eds.LEOS 2007 - The 20th Annual Meeting of the IEEE Lasers and Electro-Optics Society. Piscataway, NJ: IEEE pp. 864-865., (10.1109/LEOS.2007.4382682)
2006
- Lynch, S. A. et al. 2006. Toward Silicon-Based Lasers for Terahertz Sources. IEEE Journal of Selected Topics in Quantum Electronics 12(6), pp. 1570-1578. (10.1109/JSTQE.2006.884069)
- Zhao, M., Ni, W., Townsend, P., Lynch, S. A., Paul, D. J., Hsu, C. C. and Chang, M. N. 2006. Low-temperature molecular beam epitaxy growth of Si/SiGe THz quantum cascade structures on virtual substrates. Thin Solid Films 508(1-2), pp. 24-28. (10.1016/j.tsf.2005.07.355)
- Landais, P., Lynch, S. A., O'Gorman, J., Fischer, I. and Elsaer, W. 2006. Self-Pulsation Dynamics in Narrow Stripe Semiconductor Lasers. IEEE Journal of Quantum Electronics 42(4), pp. 381-388. (10.1109/JQE.2006.872309)
2005
- Paul, D. J. et al. 2005. Towards a Si/SiGe quantum cascade laser for terahertz applications. Presented at: Symposium F on Group IV Semiconductor Nanostructures held at the 2004 MRS Fall Meeting, Boston, MA, USA, 29 November - 2 December 2004Symposium F – Group IV Semiconductor Nanostructures. MRS Proceedings Vol. 832. Warrandale, PA: Materials Research Society pp. 59-68., (10.1557/PROC-832-F4.1)
- Lynch, S. A. et al. 2005. Silicon quantum cascade lasers for THz sources. Presented at: 18th Annual Meeting of the IEEE Lasers and Electro-Optics Society (LEOS 2005), Sydney, Australia, 22-28 October 2005 Presented at Golovchenko, E. ed.Proceedings of the 18th Annual Meeting of the IEEE Lasers and Electro-Optics Society (LEOS 2005). Los Alamitos, CA: IEEE pp. 728-729., (10.1109/LEOS.2005.1548213)
- Zhao, M., Ni, W., Townsend, P., Lynch, S. A., Paul, D. J., Hsu, C. C. and Chang, M. N. 2005. Growth and characterization of strain-symmetried Si/SiGe THz quantum cascade structures. Presented at: 2nd IEEE International Conference on Group 1V Photonics 2005, Antwerp, Belgium, 21-23 September 20052nd IEEE International Conference on Group 1V Photonics. Piscataway, NJ: IEEE pp. 10-12., (10.1109/GROUP4.2005.1516385)
- Townsend, P. et al. 2005. LO phonon scattering as a depopulation mechanism in Si/SiGe quantum cascades. Presented at: 2nd IEEE International Conference on Group 1V Photonics, Antwerp, Belgium, 21-23 September 20052nd IEEE International Conference on Group 1V Photonics 2005. Piscataway, NJ: IEEE pp. 7-9., (10.1109/GROUP4.2005.1516384)
- Lynch, S. A. et al. 2005. Terahertz emission and absorption characteristics of silicon containing boron and phosphorous impurity dopants and the effect of temperature. Presented at: 2nd IEEE International Conference on Group 1V Photonics 2005, Antwerp, Belgium, 21-23 September 20052nd IEEE International Conference on Group 1V Photonics 2005. Piscataway, NJ: IEEE pp. 13-16., (10.1109/GROUP4.2005.1516386)
- Kelsall, R. W. et al. 2005. Optical cavities for Si/SiGe tetrahertz quantum cascade emitters. Optical Materials 27(5), pp. 851-854. (10.1016/j.optmat.2004.08.023)
- Kelsall, R. et al. 2005. Intersubband lifetimes in p-Si/SiGe terahertz quantum cascade heterostructures. Physical Review B: Condensed Matter and Materials Physics 71(11), article number: 115326. (10.1103/PhysRevB.71.115326)
- Lynch, S. A. et al. 2005. Temperature dependence of terahertz optical transitions from boron and phosphorus dopant impurities in silicon. Applied Physics Letters 87(10), article number: 101114. (10.1063/1.2042544)
- Zhang, J. et al. 2005. SiGe quantum cascade structures for light emitting devices. Journal of Crystal Growth 278(1-4), pp. 488-494. (10.1016/j.jcrysgro.2004.12.046)
- Kelsall, R. W. et al. 2005. Optical cavities for Si/SiGe tetrahertz quantum cascade emitters. Optical Materials 27(5), pp. 851-854. (10.1016/j.optmat.2004.08.023)
2004
- Paul, D. J. et al. 2004. In search of a Si/SiGe THz quantum cascade laser. Presented at: Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems 2004, Atlanta, GA, USA, 8-10 September 2004Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems 2004. Warrandale, MA: IEEE pp. 143-146., (10.1109/SMIC.2004.1398188)
- Kelsall, R. W. et al. 2004. Towards SiGe Terahertz VCSELs. Materials Science Forum 453-4, pp. 1-8. (10.4028/www.scientific.net/MSF.453-454.1)
- Kelsall, R. W. et al. 2004. Silicon germanium quantum cascade heterostructures for infrared emission. Presented at: 1st IEEE International Conference on Group IV Photonics, Hong Kong, China, 29 September -1 October 2004First IEEE International Conference on Group IV Photonics, 29 Sept.-1 Oct. 2004. Los Alamitos, CA: IEEE pp. 34-36., (10.1109/GROUP4.2004.1416644)
- Lynch, S. A., McEvoy, P., O'Gorman, J., Rees, P., Elsaßer, W. and Landais, P. 2004. Temperature dependence of self-pulsation in compact disc lasers. IEE Proceedings - Optoelectronics 151(6), pp. 496-501. (10.1049/ip-opt:20040792)
2003
- Bates, R. et al. 2003. Interwell intersubband electroluminescence from Si/SiGe quantum cascade emitters. Applied Physics Letters 83(20), article number: 4092. (10.1063/1.1626003)
- Paul, D. J. et al. 2003. Si/SiGe quantum-cascade emitters for terahertz applications. Physica E: Low-dimensional Systems and Nanostructures 16(1), pp. 147-155. (10.1016/S1386-9477(02)00590-8)
- Paul, D. J. et al. 2003. Electroluminescence from Si/SiGe quantum cascade emitters. Physica E: Low-dimensional Systems and Nanostructures 16(3-4), pp. 309-314. (10.1016/S1386-9477(02)00689-6)
- Lynch, S. A. et al. 2003. Far-infrared (THz) electroluminescence from Si/SiGe quantum cascade heterostructures. Presented at: Opto-Ireland 2002: Optics and Photonics Technologies and Applications, Galway, Ireland, 5 September 2002 Presented at Glynn, T. J. ed.Opto-Ireland 2002: Optics and Photonics Technologies and Applications, 5 September 2002, Galway, Ireland. Proceedings of SPIE Vol. 4876. Bellingham, WA: SPIE - International Society for Optical Engineering pp. 140-149., (10.1117/12.463738)
- Pidgeon, C. R. et al. 2003. THz intersubband dynamics in p-Si/SiGe quantum well emitter structures. physica status solidi (b) 237(1), pp. 381-385. (10.1002/pssb.200301784)
- Liew, S. L. et al. 2003. Analysis of terahertz-emitting SiGe quantum cascade structures by transmission electron microscopy. Presented at: Microscopy of semiconducting materials 2003, Cambridge, UK, 31 March - 3 April 2003 Presented at Cullis, A. G. and Midgley, P. A. eds.Microscopy of semiconducting materials 2003: proceedings of the Institute of Physics conference, Cambridge University, 31 March - 3 April 2003. Institute of Physics Conference Series Vol. 180. Bristol: IOP Publishing pp. 155-158.
- Kelsall, R. W. et al. 2003. Terahertz Emission From Silicon-Germanium Quantum Cascades. Presented at: Towards the First Silicon Laser - NATO Advanced Research Workshop, Trento, Italy, 21-26 September 2002 Presented at Pavesi, L., Gaponenko, S. and Dal Negro, L. eds.Towards the First Silicon Laser: Proceedings of the NATO Advanced Research Workshop, Vol. VI. NATO Science Series Vol. 93. Dordrecht: Springer Netherlands pp. 367-382., (10.1007/978-94-010-0149-6_33)
- Lynch, S. et al. 2003. Far infrared (THz) electroluminescence from Si/SiGe quantum cascade heterostructures. Presented at: Optics and Photonics Technologies and Applications, Galway, Ireland, 5 - 6 Sept 2002 Presented at Thomas, J. G. ed.Opto-Ireland 2002 : optics and photonics technologies and applications : 5-6 September 2002, Galway, Ireland (Proceedings). Proceedings of SPIE--the International Society for Optical Engineering Vol. 4876. Bellingham, WA: SPIE pp. 140-149., (10.1117/12.463738)
2002
- Kelsall, R. W. et al. 2002. Terahertz intersubband emission from silicon-germanium quantum cascades. Presented at: IEEE Tenth International Conference on Terahertz Electronics, Cambridge, UK, 9-10 September 2002 Presented at Chamberlain, J. M. et al. eds.Proceedings of the Tenth International Conference on Terahertz Electronics. Warrandale, MA: IEEE pp. 9-12., (10.1109/THZ.2002.1037575)
- Lynch, S. A. et al. 2002. Intersubband electroluminescence from Si/SiGe cascade emitters at terahertz frequencies. Applied Physics Letters 81(9), article number: 1543. (10.1063/1.1501759)
- Murzyn, P. et al. 2002. Picosecond intersubband dynamics in p-Si/SiGe quantum-well emitter structures. Applied Physics Letters 80(8), article number: 1456. (10.1063/1.1452794)
- Lynch, S. A. et al. 2002. Si-based electroluminescence at THz frequencies. Materials Science and Engineering: B 89(1-3), pp. 10-12. (10.1016/S0921-5107(01)00782-6)
- Pidgeon, C. R. et al. 2002. THz intersubband dynamics in p-Si/SiGe quantum well structures. Physica E: Low-dimensional Systems and Nanostructures 13(2-4), pp. 904-907. (10.1016/S1386-9477(02)00231-X)
1999
- Mirasso, C. R. et al. 1999. Self-pulsating semiconductor lasers: theory and experiment. IEEE Journal of Quantum Electronics 35(5), pp. 764-770. (10.1109/3.760324)
- Rees, P. et al. 1999. A theoretical analysis of optical clock extraction using a self-pulsating laser diode. IEEE Journal of Quantum Electronics 35(2), pp. 221-227. (10.1109/3.740744)
1998
- Egan, A., Harley-Stead, M., Rees, P., Lynch, S. A., McEvoy, P., O'Gorman, J. and Hegarty, J. 1998. All-optical synchronization of self-pulsating laser diodes with frequency multiplication and division. Journal of Modern Optics 45(6), pp. 1239-1248. (10.1080/095003498151366)
- Lynch, S. A., McEvoy, P. T., Landais, P., O'Gorman, J., Hegarty, J. and Elsaesser, W. E. 1998. Temperature dependence of self-pulsation in narrow-stripe gain-guided compact disk laser diodes. Presented at: Laser Diodes and Applications III, Québec, Canada, 15-16 July 1998 Presented at Galarneau, P. ed.Laser Diodes and Applications III, 15-16 July 1998, Quebec, Canada. Proceedings of SPIE Vol. 3415. Bellingham, WA: SPIE - International Society for Optical Engineering pp. 2-10., (10.1117/12.326618)
1996
- Egan, A., Harley-Stead, M., Rees, P., Lynch, S. A., McEvoy, P., O'Gorman, J. and Hegarty, J. 1996. All-optical synchronization of self-pulsating laser diodes. Applied Physics Letters 68(25), article number: 3534. (10.1063/1.116521)
- Egan, A., Harley-Stead, M., Rees, P., Lynch, S. A., O'Gorman, J. and Hegarty, J. 1996. An experimental and theoretical analysis of jitter in self-pulsating lasers synchronized to periodic electrical signals. IEEE Photonics Technology Letters 8(6), pp. 758-760. (10.1109/68.502085)
Articles
- James, F. L. L. et al. 2024. Blue delayed luminescence emission in neutral nitrogen vacancy containing chemical vapor deposition synthetic diamond. physica status solidi (a) – applications and materials science 221(8), article number: 2300651. (10.1002/pssa.202300651)
- Pritchett, J. D. et al. 2024. Giant microwave-optical Kerr nonlinearity via Rydberg excitons in cuprous oxide. APL Photonics 9(3), article number: 31303. (10.1063/5.0192710)
- Komies, S., Sun, J., Hodges, C., Lynch, S. A., Watson, J. S. and Lucyszyn, S. 2024. Low-cost thermal-infrared 'THz-Torch' spectroscopy. IEEE Access 12, pp. 21868-21885. (10.1109/ACCESS.2024.3359054)
- Hekmati, R., Hadden, J. P., Mathew, A., Bishop, S. G., Lynch, S. A. and Bennett, A. J. 2023. Bullseye dielectric cavities for photon collection from a surface-mounted quantum-light-emitter. Scientific Reports 13(1), article number: 5316. (10.1038/s41598-023-32359-0)
- Rogers, J. P. et al. 2022. High-resolution nanosecond spectroscopy of even-parity Rydberg excitons in Cu2O. Physical Review B 105(11), article number: 115206. (10.1103/PhysRevB.105.115206)
- Gallagher, L. A. P. et al. 2022. Microwave-optical coupling via Rydberg excitons in cuprous oxide. Physical Review Research 4(1), article number: 13031. (10.1103/PhysRevResearch.4.013031)
- Pavlov, S. G. et al. 2021. Infrared absorption cross sections, and oscillator strengths of interstitial and substitutional double donors in silicon. Physical Review Materials 5(11), article number: 114607. (10.1103/PhysRevMaterials.5.114607)
- Dhara, S., Niang, K. M., Flewitt, A. J., Nathan, A. and Lynch, S. A. 2021. Tail state mediated conduction in zinc tin oxide thinfilm phototransistors under below bandgap optical excitation. Scientific Reports 11(1), article number: 19016. (10.1038/s41598-021-98339-4)
- Lynch, S. A. et al. 2021. Rydberg excitons in synthetic cuprous oxide (Cu2O). Physical Review Materials 5(8), article number: 86402. (10.1103/PhysRevMaterials.5.084602)
- McGuinness, C. D., Wassell, A. M., Lanigan, P. M. and Lynch, S. A. 2020. Separation of natural from laboratory-grown diamond using time-gated luminescence imaging. Gems & Gemmology 56(2), pp. 220-229. (10.5741/GEMS.56.2.220)
- Dhara, S., Niang, K. M., Flewitt, A. J., Nathan, A. and Lynch, S. A. 2019. Photoconductive laser spectroscopy as a method to enhance defect spectral signatures in amorphous oxide semiconductor thin- film transistors. Applied Physics Letters 114(1), article number: 11907. (10.1063/1.5070141)
- Wassell, A. M. et al. 2018. Anomalous green luminescent properties in CVD synthetic diamonds. physica status solidi (a) 215(22), article number: 1800292. (10.1002/pssa.201800292)
- Mandal, S. et al. 2017. Surface zeta potential and diamond seeding on gallium nitride films. ACS Omega 2(10), pp. 7275-7280. (10.1021/acsomega.7b01069)
- Matmon, G., Lynch, S. A., Rosenbaum, T. F., Fisher, A. J. and Aeppli, G. 2016. Optical response from terahertz to visible light of electronuclear transitions in LiYF4:Ho3+. Physical Review B 94(20), article number: 205132. (10.1103/PhysRevB.94.205132)
- Hübers, H. et al. 2013. Isotope effect on the lifetime of the 2p0 state in phosphorus-doped silicon. Physical Review B: Condensed Matter and Materials Physics 88(3), article number: 35201. (10.1103/PhysRevB.88.035201)
- Vinh, N. Q. et al. 2013. Time-resolved dynamics of shallow acceptor transitions in silicon. Physical Review X 3(1), article number: 11019. (10.1103/PhysRevX.3.011019)
- Astrov, Y. A., Lynch, S. A., Shuman, V. B., Portsel, L. M., Makhova, A. A. and Lodygin, A. N. 2013. Silicon with an increased content of monoatomic sulfur centers: Sample fabrication and optical spectroscopy. Semiconductors 47(2), pp. 247-251. (10.1134/S1063782613020048)
- Nickels, P. et al. 2012. Laboratory scale water circuit including a photocatalytic reactor and a portable in-stream sensor to monitor pollutant degradation. Industrial & Engineering Chemistry Research 51(8), pp. 3301-3308. (10.1021/ie202366m)
- Hamdy, M. S. et al. 2012. Parameters controlling the photocatalytic performance of ZnO/Hombikat TiO2 composites. Journal of Photochemistry and Photobiology A: Chemistry 228(1), pp. 1-7. (10.1016/j.jphotochem.2011.11.001)
- Lynch, S. A. et al. 2010. Inhomogeneous broadening of phosphorus donor lines in the far-infrared spectra of single-crystalline SiGe. Physical Review. B, Condensed Matter and Materials Physics 82(24), article number: 245206. (10.1103/PhysRevB.82.245206)
- Greenland, P. T. et al. 2010. Coherent control of Rydberg states in silicon. Nature 465(7301), pp. 1057-1061. (10.1038/nature09112)
- Vinh, N. Q. et al. 2008. Silicon as a model ion trap: time domain measurements of donor Rydberg states. Proceedings of the National Academy of Sciences of the United States of America 105(31), pp. 10649-10653. (10.1073/pnas.0802721105)
- Zhao, M., Karim, A., Hansson, G. V., Ni, W., Townsend, P., Lynch, S. A. and Paul, D. J. 2008. Molecular beam epitaxy growth of Si/SiGe bound-to-continuum quantum cascade structures for THz emission. Thin Solid Films 517(1), pp. 34-37. (10.1016/j.tsf.2008.08.091)
- Lynch, S. A. et al. 2006. Toward Silicon-Based Lasers for Terahertz Sources. IEEE Journal of Selected Topics in Quantum Electronics 12(6), pp. 1570-1578. (10.1109/JSTQE.2006.884069)
- Zhao, M., Ni, W., Townsend, P., Lynch, S. A., Paul, D. J., Hsu, C. C. and Chang, M. N. 2006. Low-temperature molecular beam epitaxy growth of Si/SiGe THz quantum cascade structures on virtual substrates. Thin Solid Films 508(1-2), pp. 24-28. (10.1016/j.tsf.2005.07.355)
- Landais, P., Lynch, S. A., O'Gorman, J., Fischer, I. and Elsaer, W. 2006. Self-Pulsation Dynamics in Narrow Stripe Semiconductor Lasers. IEEE Journal of Quantum Electronics 42(4), pp. 381-388. (10.1109/JQE.2006.872309)
- Kelsall, R. W. et al. 2005. Optical cavities for Si/SiGe tetrahertz quantum cascade emitters. Optical Materials 27(5), pp. 851-854. (10.1016/j.optmat.2004.08.023)
- Kelsall, R. et al. 2005. Intersubband lifetimes in p-Si/SiGe terahertz quantum cascade heterostructures. Physical Review B: Condensed Matter and Materials Physics 71(11), article number: 115326. (10.1103/PhysRevB.71.115326)
- Lynch, S. A. et al. 2005. Temperature dependence of terahertz optical transitions from boron and phosphorus dopant impurities in silicon. Applied Physics Letters 87(10), article number: 101114. (10.1063/1.2042544)
- Zhang, J. et al. 2005. SiGe quantum cascade structures for light emitting devices. Journal of Crystal Growth 278(1-4), pp. 488-494. (10.1016/j.jcrysgro.2004.12.046)
- Kelsall, R. W. et al. 2005. Optical cavities for Si/SiGe tetrahertz quantum cascade emitters. Optical Materials 27(5), pp. 851-854. (10.1016/j.optmat.2004.08.023)
- Kelsall, R. W. et al. 2004. Towards SiGe Terahertz VCSELs. Materials Science Forum 453-4, pp. 1-8. (10.4028/www.scientific.net/MSF.453-454.1)
- Lynch, S. A., McEvoy, P., O'Gorman, J., Rees, P., Elsaßer, W. and Landais, P. 2004. Temperature dependence of self-pulsation in compact disc lasers. IEE Proceedings - Optoelectronics 151(6), pp. 496-501. (10.1049/ip-opt:20040792)
- Bates, R. et al. 2003. Interwell intersubband electroluminescence from Si/SiGe quantum cascade emitters. Applied Physics Letters 83(20), article number: 4092. (10.1063/1.1626003)
- Paul, D. J. et al. 2003. Si/SiGe quantum-cascade emitters for terahertz applications. Physica E: Low-dimensional Systems and Nanostructures 16(1), pp. 147-155. (10.1016/S1386-9477(02)00590-8)
- Paul, D. J. et al. 2003. Electroluminescence from Si/SiGe quantum cascade emitters. Physica E: Low-dimensional Systems and Nanostructures 16(3-4), pp. 309-314. (10.1016/S1386-9477(02)00689-6)
- Pidgeon, C. R. et al. 2003. THz intersubband dynamics in p-Si/SiGe quantum well emitter structures. physica status solidi (b) 237(1), pp. 381-385. (10.1002/pssb.200301784)
- Lynch, S. A. et al. 2002. Intersubband electroluminescence from Si/SiGe cascade emitters at terahertz frequencies. Applied Physics Letters 81(9), article number: 1543. (10.1063/1.1501759)
- Murzyn, P. et al. 2002. Picosecond intersubband dynamics in p-Si/SiGe quantum-well emitter structures. Applied Physics Letters 80(8), article number: 1456. (10.1063/1.1452794)
- Lynch, S. A. et al. 2002. Si-based electroluminescence at THz frequencies. Materials Science and Engineering: B 89(1-3), pp. 10-12. (10.1016/S0921-5107(01)00782-6)
- Pidgeon, C. R. et al. 2002. THz intersubband dynamics in p-Si/SiGe quantum well structures. Physica E: Low-dimensional Systems and Nanostructures 13(2-4), pp. 904-907. (10.1016/S1386-9477(02)00231-X)
- Mirasso, C. R. et al. 1999. Self-pulsating semiconductor lasers: theory and experiment. IEEE Journal of Quantum Electronics 35(5), pp. 764-770. (10.1109/3.760324)
- Rees, P. et al. 1999. A theoretical analysis of optical clock extraction using a self-pulsating laser diode. IEEE Journal of Quantum Electronics 35(2), pp. 221-227. (10.1109/3.740744)
- Egan, A., Harley-Stead, M., Rees, P., Lynch, S. A., McEvoy, P., O'Gorman, J. and Hegarty, J. 1998. All-optical synchronization of self-pulsating laser diodes with frequency multiplication and division. Journal of Modern Optics 45(6), pp. 1239-1248. (10.1080/095003498151366)
- Egan, A., Harley-Stead, M., Rees, P., Lynch, S. A., McEvoy, P., O'Gorman, J. and Hegarty, J. 1996. All-optical synchronization of self-pulsating laser diodes. Applied Physics Letters 68(25), article number: 3534. (10.1063/1.116521)
- Egan, A., Harley-Stead, M., Rees, P., Lynch, S. A., O'Gorman, J. and Hegarty, J. 1996. An experimental and theoretical analysis of jitter in self-pulsating lasers synchronized to periodic electrical signals. IEEE Photonics Technology Letters 8(6), pp. 758-760. (10.1109/68.502085)
Conferences
- Lynch, S. A. et al. 2010. Quantum control of phosphorus donor rydberg states in silicon. Presented at: 7th IEEE International Conference on Group IV Photonics (GFP),, Beijing, China, 1-3 Sept. 2010.Proceedings of the 7th IEEE International Conference On Group IV Photonics, Beijing, China, 1-3 September 2010. IEEE International Conference on Group IV Photonics Piscataway, NJ: IEEE pp. 380-382., (10.1109/GROUP4.2010.5643318)
- Lynch, S. A. et al. 2010. First observation of a THz photon echo. Presented at: 35th International Conference on Infrared, Millimeter, and Terahertz Waves, Rome, Italy, 5-10 September 2010Proceedings of the 35th International Conference on Infrared Millimeter and Terahertz Waves (IRMMW-THz), Rome, Italy, 5-10 September 2010. Piscataway, NJ: IEEE pp. 1-2., (10.1109/ICIMW.2010.5612667)
- Lynch, S. A. et al. 2008. Lifetime measurements of group V donor Rydberg states in silicon at THz frequencies. Presented at: 5th IEEE International Conference on Group IV Photonics, Sorrento, Italy, 17-19 September 2008 Presented at Pavesi, L. and Priolo, F. eds.Group IV Photonics, 2008, 5th IEEE International Conference, 17-19 Sept. 2008. Los Alamitos, CA: IEEE pp. 24-26., (10.1109/GROUP4.2008.4638084)
- Latkowski, S., Landais, P., Surre, F. and Lynch, S. A. 2007. CW-THz wave generation using a multimode semiconductor laser at room temperature. Presented at: LEOS 2007 - The 20th Annual Meeting of the IEEE Lasers and Electro-Optics Society, Lake Buena Vista, FL, USA, 21-25 October 2007 Presented at Golovchenko, E. and Ünlü, M. S. eds.LEOS 2007 - The 20th Annual Meeting of the IEEE Lasers and Electro-Optics Society. Piscataway, NJ: IEEE pp. 864-865., (10.1109/LEOS.2007.4382682)
- Paul, D. J. et al. 2005. Towards a Si/SiGe quantum cascade laser for terahertz applications. Presented at: Symposium F on Group IV Semiconductor Nanostructures held at the 2004 MRS Fall Meeting, Boston, MA, USA, 29 November - 2 December 2004Symposium F – Group IV Semiconductor Nanostructures. MRS Proceedings Vol. 832. Warrandale, PA: Materials Research Society pp. 59-68., (10.1557/PROC-832-F4.1)
- Lynch, S. A. et al. 2005. Silicon quantum cascade lasers for THz sources. Presented at: 18th Annual Meeting of the IEEE Lasers and Electro-Optics Society (LEOS 2005), Sydney, Australia, 22-28 October 2005 Presented at Golovchenko, E. ed.Proceedings of the 18th Annual Meeting of the IEEE Lasers and Electro-Optics Society (LEOS 2005). Los Alamitos, CA: IEEE pp. 728-729., (10.1109/LEOS.2005.1548213)
- Zhao, M., Ni, W., Townsend, P., Lynch, S. A., Paul, D. J., Hsu, C. C. and Chang, M. N. 2005. Growth and characterization of strain-symmetried Si/SiGe THz quantum cascade structures. Presented at: 2nd IEEE International Conference on Group 1V Photonics 2005, Antwerp, Belgium, 21-23 September 20052nd IEEE International Conference on Group 1V Photonics. Piscataway, NJ: IEEE pp. 10-12., (10.1109/GROUP4.2005.1516385)
- Townsend, P. et al. 2005. LO phonon scattering as a depopulation mechanism in Si/SiGe quantum cascades. Presented at: 2nd IEEE International Conference on Group 1V Photonics, Antwerp, Belgium, 21-23 September 20052nd IEEE International Conference on Group 1V Photonics 2005. Piscataway, NJ: IEEE pp. 7-9., (10.1109/GROUP4.2005.1516384)
- Lynch, S. A. et al. 2005. Terahertz emission and absorption characteristics of silicon containing boron and phosphorous impurity dopants and the effect of temperature. Presented at: 2nd IEEE International Conference on Group 1V Photonics 2005, Antwerp, Belgium, 21-23 September 20052nd IEEE International Conference on Group 1V Photonics 2005. Piscataway, NJ: IEEE pp. 13-16., (10.1109/GROUP4.2005.1516386)
- Paul, D. J. et al. 2004. In search of a Si/SiGe THz quantum cascade laser. Presented at: Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems 2004, Atlanta, GA, USA, 8-10 September 2004Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems 2004. Warrandale, MA: IEEE pp. 143-146., (10.1109/SMIC.2004.1398188)
- Kelsall, R. W. et al. 2004. Silicon germanium quantum cascade heterostructures for infrared emission. Presented at: 1st IEEE International Conference on Group IV Photonics, Hong Kong, China, 29 September -1 October 2004First IEEE International Conference on Group IV Photonics, 29 Sept.-1 Oct. 2004. Los Alamitos, CA: IEEE pp. 34-36., (10.1109/GROUP4.2004.1416644)
- Lynch, S. A. et al. 2003. Far-infrared (THz) electroluminescence from Si/SiGe quantum cascade heterostructures. Presented at: Opto-Ireland 2002: Optics and Photonics Technologies and Applications, Galway, Ireland, 5 September 2002 Presented at Glynn, T. J. ed.Opto-Ireland 2002: Optics and Photonics Technologies and Applications, 5 September 2002, Galway, Ireland. Proceedings of SPIE Vol. 4876. Bellingham, WA: SPIE - International Society for Optical Engineering pp. 140-149., (10.1117/12.463738)
- Liew, S. L. et al. 2003. Analysis of terahertz-emitting SiGe quantum cascade structures by transmission electron microscopy. Presented at: Microscopy of semiconducting materials 2003, Cambridge, UK, 31 March - 3 April 2003 Presented at Cullis, A. G. and Midgley, P. A. eds.Microscopy of semiconducting materials 2003: proceedings of the Institute of Physics conference, Cambridge University, 31 March - 3 April 2003. Institute of Physics Conference Series Vol. 180. Bristol: IOP Publishing pp. 155-158.
- Kelsall, R. W. et al. 2003. Terahertz Emission From Silicon-Germanium Quantum Cascades. Presented at: Towards the First Silicon Laser - NATO Advanced Research Workshop, Trento, Italy, 21-26 September 2002 Presented at Pavesi, L., Gaponenko, S. and Dal Negro, L. eds.Towards the First Silicon Laser: Proceedings of the NATO Advanced Research Workshop, Vol. VI. NATO Science Series Vol. 93. Dordrecht: Springer Netherlands pp. 367-382., (10.1007/978-94-010-0149-6_33)
- Lynch, S. et al. 2003. Far infrared (THz) electroluminescence from Si/SiGe quantum cascade heterostructures. Presented at: Optics and Photonics Technologies and Applications, Galway, Ireland, 5 - 6 Sept 2002 Presented at Thomas, J. G. ed.Opto-Ireland 2002 : optics and photonics technologies and applications : 5-6 September 2002, Galway, Ireland (Proceedings). Proceedings of SPIE--the International Society for Optical Engineering Vol. 4876. Bellingham, WA: SPIE pp. 140-149., (10.1117/12.463738)
- Kelsall, R. W. et al. 2002. Terahertz intersubband emission from silicon-germanium quantum cascades. Presented at: IEEE Tenth International Conference on Terahertz Electronics, Cambridge, UK, 9-10 September 2002 Presented at Chamberlain, J. M. et al. eds.Proceedings of the Tenth International Conference on Terahertz Electronics. Warrandale, MA: IEEE pp. 9-12., (10.1109/THZ.2002.1037575)
- Lynch, S. A., McEvoy, P. T., Landais, P., O'Gorman, J., Hegarty, J. and Elsaesser, W. E. 1998. Temperature dependence of self-pulsation in narrow-stripe gain-guided compact disk laser diodes. Presented at: Laser Diodes and Applications III, Québec, Canada, 15-16 July 1998 Presented at Galarneau, P. ed.Laser Diodes and Applications III, 15-16 July 1998, Quebec, Canada. Proceedings of SPIE Vol. 3415. Bellingham, WA: SPIE - International Society for Optical Engineering pp. 2-10., (10.1117/12.326618)
Research
The focus of my research over the past two decades has been on light-matter interactions, more specifically the quantum physics behind these interactions.
During my first seven years as a postdoctoral researcher at the Cavendish Laboratory, I worked on the infrared and THz properties of semiconductor materials, with the goal of understanding whether it is possible to engineer a silicon-based quantum cascade laser. My 2002/2003 papers on THz intersubband electroluminescence from SiGe quantum cascade structures, were world-firsts and are still the most highly cited works in the field.
Following my move to the London Centre for Nanotechnology at UCL, the focus of my work shifted slightly, towards exploiting the THz properties of Group-V donor atoms in silicon for quantum technologies. Much of this work was performed at the FELIX free electron laser facility in the Netherlands. The highlight of this research was my 2010 Nature paper, which represents a breakthrough in the field of silicon-based quantum computing.
When I moved to Cardiff the focus of my work shifted slightly again, towards shorter wavelengths. Chalcogen (Group-VI) doners in silicon can be manipulated with more energetic mid-infrared light. This work was funded by the Leverhulme Trust. I also expanded my research interests to explore the electronic and optical properties of transparent oxide materials (in collaboration with Cambridge). More recently I have been working on Rydberg excitons in cuprous oxide. This fascinating subject bridges the gap between semiconductor and atomic physics. The work is funded by the EPSRC and is done in collaboration with my close colleagues at Durham University. I also have an interest in the optical properties of diamond and two PhD students under my supervision have been funded by De Beers.
Teaching
PX2236: Introduction to Condensed Matter Physics
Biography
My postdoctoral research career began on joining Prof Sir Mike Pepper’s group at the Cavendish Laboratory, at the beginning of 2000, following the successful defence of my PhD at Trinity College Dublin. I was subsequently elected to a Research Fellowship at St Edmund’s College, Cambridge, in 2002. During this time I worked on the development of far-infrared (THz) SiGe quantum cascade devices.
In 2007 I joined the London Centre for Nanotechnology at University College London, working first under the late Prof Marshall Stoneham FRS, and later Prof Gabriel Aeppli FRS. I was awarded an EPSRC Advanced Research Fellowship to work on the physics of far-infrared emission from impurity doped semiconductors later that year.
I moved to Cardiff University mid 2011 to a tenured academic position, first as Senior Lecturer before being promoted to a personal chair. I was appointed Associate Dean of Research for the College of Physical Sciences and Engineering in 2018, and subsequently Dean of Research and Innovation for the College of Physical Sciences and Engineering in 2020, following an open competition.
Professional memberships
I am a currently a Senior Member of the IEEE. I have been a member of the EPSRC College since 2008, and I have served several EPSRC Panels from 2010. I chaired one of the EPSRC ICT Panels in 2013. I have served on the Royal Academy of Engineering Sift Panel for Research Fellowships for 2010 and 2011. I have served on the 2011 IEEE Panel for elevation to Senior Member level.
Supervisions
Current supervision
Ffion James
Research student
Reza Hekmati
Research student
Sam Gavin-pitt
Research student