![Naresh Gunasekar](https://profiles-cardiff.imgix.net/attachments/5551?w=200&h=200&auto=format&crop=faces&fit=crop&q=90")
Dr Naresh Gunasekar
Lecturer
Condensed Matter and Photonics Group
School of Physics and Astronomy
- Available for postgraduate supervision
Overview
I am interested in the physics of compound semiconductor materials, relating their physical properties to the functional properties of optoelectronic and electronic devices. I collaborate extensively with the UK nitrides consortium and other higher education institutions and semiconductor manufacturers in the US and Japan in developing technologies for the next generations of ultra-wide bandgap devices.
Publication
2024
- Hunter, D. A. et al. 2024. Tin gallium oxide epilayers on different substrates: optical and compositional analysis. Physica Status Solidi (B) – basic solid state physics 261(10), article number: 2400137. (10.1002/pssb.202400137)
- Edwards, P. R., Gunasekar, N., Mckendry, J. J. D., Xie, E., Gu, E., Dawson, M. D. and Martin, R. W. 2024. Simultaneous mapping of cathodoluminescence spectra and backscatter diffraction patterns in a scanning electron microscope. Nanotechnology 35, article number: 39. (10.1088/1361-6528/ad5dba)
- Eling, C. J., Bruce, N., Gunasekar, N., Alves, P. U., Edwards, P. R., Martin, R. W. and Laurand, N. 2024. Biotinylated photocleavable semiconductor colloidal quantum dot supraparticle microlaser. ACS Applied Nano Material 7(8), pp. 9159–9166. (10.1021/acsanm.4c00668)
2022
- Gunasekar, N. 2022. Role of defects in ultra-high gain in fast planar tin gallium oxide UV-C photodetector by MBE. Applied Physics Letters 121(11), article number: 111105. (10.1063/5.0107557)
Articles
- Hunter, D. A. et al. 2024. Tin gallium oxide epilayers on different substrates: optical and compositional analysis. Physica Status Solidi (B) – basic solid state physics 261(10), article number: 2400137. (10.1002/pssb.202400137)
- Edwards, P. R., Gunasekar, N., Mckendry, J. J. D., Xie, E., Gu, E., Dawson, M. D. and Martin, R. W. 2024. Simultaneous mapping of cathodoluminescence spectra and backscatter diffraction patterns in a scanning electron microscope. Nanotechnology 35, article number: 39. (10.1088/1361-6528/ad5dba)
- Eling, C. J., Bruce, N., Gunasekar, N., Alves, P. U., Edwards, P. R., Martin, R. W. and Laurand, N. 2024. Biotinylated photocleavable semiconductor colloidal quantum dot supraparticle microlaser. ACS Applied Nano Material 7(8), pp. 9159–9166. (10.1021/acsanm.4c00668)
- Gunasekar, N. 2022. Role of defects in ultra-high gain in fast planar tin gallium oxide UV-C photodetector by MBE. Applied Physics Letters 121(11), article number: 111105. (10.1063/5.0107557)
Research
My research interests include the fabrication and characterisation of optoelectronic devices. Currently, I am working in partnership with my collaborators to develop technologies for manufacturing deep UV photodetectors and light emitters. I am also interested in developing and applying multimodal, correlative light-electron microscopy techniques for the reliability and failure analysis of compound semiconductor devices. This involves the exploration of transport properties of fundamental energy carriers, such as electrons at the smallest length and time scales.
Teaching
- Deputy Module Organiser for Intermediate Practical Physics PX2150 and PX2133
- MSc project supervision
- CDT
Biography
Naresh Gunasekar received his PhD from the University of Strathclyde in Glasgow in 2013 and continued working there as a Research Associate until August 2022.
Honours and awards
- Scottish Universities Physics Alliance (SUPA) early career short-term research award (2020)
- SUPA postdoctoral short-term research award (2013)
- Best poster award at European Microscopy Congress in Manchester, UK (2012)
- Marie Curie Initial training network early career fellowship (2009 - 2012)
Professional memberships
- Fellow of the Royal Microscopical Society
- Associate Teaching Fellow, Higher Education Academy (HEA), UK.
Academic positions
- 2020 - 2021: Visiting Researcher in Imaging Physics Dept, TU Delft, Netherlands.
- 2007 - 2009: Project Associate, Department of Chemistry, Indian Institute of Technology Madras.
Supervisions
I am interested in supervising PhD students in the area of:
- Wide bandgap materials and optoelectronic devices (III-Nitrides)
- Ultra-wideband gap semiconductors (Ga2O3, AlN)
- UV optoelectronics and deep UV photodetectors
- Defect characterisation in compound semiconductors
- Reliability and Failure analysis of optoelectronic devices
Current supervision
Raed Alshammary
Research student
Contact Details
+44 29225 10048
Translational Research Hub, Room Room 1.08, Maindy Road, Cathays, Cardiff, CF24 4HQ
Queen's Buildings - North Building, Floor 1, Room N/1.11B, 5 The Parade, Newport Road, Cardiff, CF24 3AA
Research themes
Specialisms
- Compound semiconductors
- Detectors
- Microscopy
- Nanometrology
- Nanoscale characterisation