Research interests and activities

My current research interest explores methods of coupling single photons from directly targeted implanted quantum emitters efficiently into integrated photonic circuitry. My expertise lies in the design, simulation and prototype fabrication using photonic crystals, plasmonics and metamaterials. With this expertise, I am collaborating on projects to reduce the footprint of non-linear on-chip photon sources.

I also have a keen interest and ongoing collaborations in microfluidic acoustic particle trapping and manipulation with Bristol-based company FluoretiQ.

I hold a Technical Liaison role within the University for Ansys Lumerical Software.

Current PhD students

Recent publications

• J. R. Pugh, E. Harbord, A. Sarua, P. Fletcher, Y. Tian, T. Wang, and M. J. Cryan, “A Tamm Plasmon-Porous GaN Distributed Bragg Reflector Cavity”, Journal of Optics, 23, 035003 (2021)
• S. Jia, E. Le Boulbar, K. Balram, J. R. Pugh, T. Wang, D. W. E. Allsopp, P. A. Shields, and M. J. Cryan, “A Waveguide Integrated GaN Distributed Bragg Reflector Cavity Using Low Cost Nanolithography”, Micro & Nano Letters, 14, 13, 1322-1327 (2019)
• Q. M. Ngo, Y-L. D. Ho, J. R. Pugh, A. Sarua and M. J. Cryan, “Enhanced UV/blue fluorescent sensing using metal-dielectric-metal aperture nanoantenna arrays”, Curr. App. Phys., 18, 7 (2018)
• G. Kusch, M. Conroy, H. Li, P. R. Edwards, C. Zhao, B. S. Ooi, J. R. Pugh, M. J. Cryan, P. J. Parbrook and R. W. Martin, “Multi-wavelength emission from a single InGaN/GaN nanorod analyzed by cathodoluminescence hyperspectral imaging”, Sci. Rep., 8, 1742, (2018)
• M. Athanasiou, R. M. Smith, J. R. Pugh, M. J Cryan & T. Wang,  “Monolithically multi-color lasing from an InGaN microdisk on a Si substrate”, Sci. Rep., 7, 10086 (2017)
• P-M. Coulon, J. R. Pugh, M. Athanasiou, G. Kusch, E. D. Le Boulbar, A. Sarua, R. Smith, R.W. Martin, T. Wang, M. J. Cryan, D. W. E. Allsopp and P. A. Shields, “Optical properties and resonant cavity modes in axial InGaN/GaN nanotube microcavities”, Opt. Exp., 25, 23, 28246 - 28257 (2017)
• N. Ahmad, S. Nunez-Sanchez, J. R. Pugh and M. J. Cryan, “Deep-groove nickel gratings for solar thermal absorbers”, J. Opt., 18, 10, 105901 (2016)
• C. Wan, Y-L, D. Ho, S. Nunez-Sanchez, L. Chen, M. Lopez-Garcia, J. R. Pugh, B. Zhu, P. Selvaraj, T. K. Mallick, S. Sundaram and M. J. Cryan, “A Selective Metasurface Absorber with An Amorphous Carbon Interlayer for Solar Thermal Applications”, Nano Energy, 26 (2016)
• J. Stokes, A. Sarua, J. R. Pugh, N. Dorh, J. W Munns, P. G. Bassindale, N. Ahmad, A. J. Orr-Ewing and M. J. Cryan, “Purcell enhancement and focusing effects in plasmonic nanoantenna arrays”, J. Opt. Soc. Am. B, 32, 10, 2158 - 2163 (2015)
• J. R. Pugh et al. “Slot-grating flat lens for telecom wavelengths”, Opt. Lett., 39, 13, 3786 - 3789 (2014)