2011

Abid, K., Khokhar, A.Z. , and Rahman, F. (2011) High responsivity silicon MOS phototransistors. Sensors and Actuators A: Physical, 172 (2). pp. 434-439. ISSN 0924-4247 (doi:10.1016/j.sna.2011.10.008)

Rahman, F., and Khokhar, A.Z. (2011) Enhanced photoluminescence from photonic crystal-coated GaN LED wafers. Applied Physics B: Lasers and Optics, 103 (3). pp. 623-628. ISSN 0946-2171 (doi:10.1007/s00340-011-4545-9)

Khokhar, A.Z., Rahman, F. , and Johnson, N.P. (2011) Photonic crystal heterostructures from self-assembled opals. Applied Physics A: Materials Science and Processing, 102 (2). pp. 281-287. ISSN 0947-8396 (doi:10.1007/s00339-010-6145-7)

Khokhar, A.Z., Rahman, F. , and Johnson, N.P. (2011) Preparation and properties of gold-infiltrated polystyrene photonic crystals. Journal of Physics and Chemistry of Solids, 72 (3). pp. 185-189. ISSN 0022-3697 (doi:10.1016/j.jpcs.2010.12.010)

Dylewicz, R., Khokhar, A.Z. , Wasielewski, R., Mazur, P., and Rahman, F. (2011) Nanotexturing of GaN light-emitting diode material through mask-less dry etching. Nanotechnology, 22 (5). 055301. ISSN 0957-4484 (doi:10.1088/0957-4484/22/5/055301)

Abid, K., Wang, X. , Khokhar, A.Z. , Watson, S., Al-Hasani, S., and Rahman, F. (2011) Electrically tuneable spectral responsivity in gated silicon photodiodes. Applied Physics Letters, 99 (23). p. 231104. ISSN 0003-6951 (doi:10.1063/1.3665613)

Dylewicz, R., Khokhar, A. , Wasielewski, R., Mazur, P, and Rahman, F. (2011) Nanotexturing of GaN light-emitting diode material through mask-less dry etching. Nanotechnology, 22 (5). 055301. ISSN 0957-4484 (doi:10.1088/0957-4484/22/5/055301)

2010

Khokhar, A.Z. et al. (2010) Nanofabrication of gallium nitride photonic crystal light-emitting diodes. Microelectronic Engineering, 87 (11). pp. 2200-2207. ISSN 0167-9317 (doi:10.1016/j.mee.2010.02.003)

Taking, S. et al. (2010) Surface passivation of AlN/GaN MOS-HEMTs using ultra-thin Al2O3 formed by thermal oxidation of evaporated aluminium. Electronics Letters, 46 (4). pp. 301-302. ISSN 0013-5194 (doi:10.1049/el.2010.2781)

De La Rue, R. et al. (2010) Micro-nano-photonic device structures applied to communications, sensing and consumer optoelectrics. In: 5th International Conference on Advanced Optoelectronics and Lasers (CAOL '2010), 10-14 Sep 2010, Sevastopol, Crimea, Ukraine.

Dylewicz, R., McMeekin, S.G., Khokhar, A.Z. , De La Rue, R. , and Johnson, N.P. (2010) Split ring resonators: the effect of titanium adhesion layers on the optical response. In: Johnson, N.P., Özbay, E., Ziolkowski, R.W. and Zheludev, N.I. (eds.) Metamaterials V. Series: Proceedings of SPIE (7711). SPIE, Bellingham, Washington, USA. ISBN 9780819481849

Gaston, A., Khokhar, A.Z. , Bilbao, L., Saez-Martinez, V., Corres, A., Obieta, I., and Gadegaard, N. (2010) Nanopatterned UV curable hydrogels for biomedical applications. Microelectronic Engineering, 87 (5-8). pp. 1057-1061. ISSN 0167-9317 (doi:10.1016/j.mee.2009.11.089)

Johnson, N., Lahiri, B. , Khokhar, A. , De La Rue, R. , and McMeekin, S.G. (2010) Split ring resonators: from visible magnetic response to organic sensors (invited). In: 4th International Congress of Advanced Electromagnetic Materials in Microwaves and Optics, Sep 2010, Karlsruhe, Germany.

Johnson, N., Lahiri, B. , McMeekin, S., Khokhar, A. , and De La Rue, R. (2010) Split ring resonators: from organic sensors to visible magnetic response (invited). In: SPIE Photonics Europe, 12-16 Apr 2010, Brussels, Belgium.

Lahiri, B., McMeekin, S.G., Khokhar, A.Z. , De La Rue, R.M. , and Johnson, N.P. (2010) Magnetic response of split ring resonators (SRRs) at visible frequencies. Optics Express, 18 (3). pp. 3210-3218. ISSN 1094-4087 (doi:10.1364/OE.18.003210)

Taking, S., Khokhar, A. , MacFarlane, D., Sharabi, S., Dabiran, A.M., and Wasige, E. (2010) New Process for Low Sheet and Ohmic Contact Resistance of AlN/GaN MOS-HEMTs. In: The 5th European Microwave Integrated Circuits Conference, Proceedings, 26th Sept – 1st Oct 2010, France.

2009

Rahman, F., Oxland, R.K. , and Khokhar, A.Z. (2009) Surface passivation of nitride- and phosphide-based compound semiconductors. Journal of Optoelectronics and Advanced Materials, 11 (8). pp. 1117-1121. ISSN 1454-4164

Johnson, N., Lahiri, B. , Khokhar, A. , De La Rue, R. , and McMeekin, S.G. (2009) Asymmetric split ring resonators for Infra Red optical sensing of organic materials. In: 3rd International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, 30 Aug- 4 Sep 2009, London, UK.

Khokhar, A.Z. et al. (2009) Patterning of photonic quasi-crystals on GaN LEDs. In: IEEE/LEOS Winter Topicals Meeting Series, 12-14 Jan 2009, Innsbruck, Austria.

Khokhar, A.Z. et al. (2009) Modelling, fabrication and characterisation of photonic quasicrystal structures on GaN LEDs. In: UK Nitride Consortium Annual Conference, 7-8 Jan 2009, Oxford, UK.

Lahiri, B., Khokhar, A. , De La Rue, R. , McMeekin, S.G., and Johnson, N. (2009) Asymmetric split ring resonators for optical sensing. In: SPIE Europe Optics and Optoelectronics, 20-23 Apr 2009, Prague, Czech Rep.

Lahiri, B., Khokhar, A. , De La Rue, R. , McMeekin, S.G., and Johnson, N. (2009) Asymmetric split ring resonators for optical sensing of organic materials. Optics Express, 17 (2). pp. 1107-1115. ISSN 1094-4087 (doi:10.1364/OE.17.001107)

Lahiri, B., McMeekin, S.G., Khokhar, A. , De La Rue, R. , and Johnson, N. (2009) Asymmetric split ring resonators for organic sensing. In: 11th International Conference on Transparent Optical Network (ICTON 09), 28 Jun - 2 Jul 2009, Azores, Portugal.

2008

Rahman, F., and Khokhar, A. (2008) Holey LEDs target TV backlights. Compound Semiconductor, 14 (8). pp. 23-25. ISSN 1096-598X

De La Rue, R. et al. (2008) Photonic crystal (PhC) and photonic quasi crystal (PQC) light extraction structures for enhanced efficiency and beamshape control in light-emitting devices. In: Photonics 2008, 15-17 December 2008, New Delhi, India.

De La Rue, R.M. et al. (2008) Strongly confined guided-wave photonic structures with nano-scale control for linear and non-linear functionality. In: 17th International Laser Physics Workshop, 30 June - 4 July 2008, Trondheim, Norway.

Johnson, N.P., Lahiri, B. , Khokhar, A.Z. , De La Rue, R.M. , and McMeekin, S. (2008) Optical properties of split ring resonator metamaterial structures on semiconductor substrates - art. no. 69871F 27. In: Johnson, N.P., Ozbay, E., Zheludev, N.I. and Ziolkowski, R.W. (eds.) Metamaterials III. Series: Proceedings of the Society of Photo-Optical Instrumentation Engineers (SPIE) (6987). SPIE, Bellingham, WA, F9871-F9871. ISBN 9780819471857

Khokhar, A. Z., De La Rue, R. M. , Treble, B. M., McComb, D. W., and Johnson, N. P. (2008) Stibnite inverse opal. Micro and Nano Letters, 3 (1). pp. 1-6. ISSN 1750-0443 (doi:10.1049/mnl:20070059)

Khokhar, A.Z., Macintyre, D.P. , Rahman, F. , Johnson, N.P. , Watson, I.M., Gu, E., Zhang, H., Dawson, M.D., and De La Rue, R.M. (2008) Lithographic processing of photonic crystal structures on GaN epilayers for LED applications. In: UK Nitride Consortium Annual Conference, 9-10 Jan 2008, Glasgow, UK.

Khokhar, A.Z. et al. (2008) Nanoimprint lithography patterning of photonic quasicrystal light extraction structures on InGaN/GaN blue LEDs. In: UK Semiconductor 08 Conference, 2-3 July 2008, Sheffield, UK.

Rahman, F., and Khokhar, A. Z. (2008) Thermochromic effect in synthetic opal/polyaniline composite structures. Applied Physics A-Materials Science and Processing, 94 (2). pp. 405-410. ISSN 0947-8396 (doi:10.1007/s00339-008-4822-6)

Watson, I.M., Xiong, C., Kelm, P., Zhang, H., Dawson, M.D., Khokhar, A.Z. , Macintyre, D.S., Johnson, N.P. , Rahman, F. , and De la Rue, R.M. (2008) Fabrication and characterisation of GaN-based photonic quasicrystal LEDs. In: UK Semiconductor 08 Conference, 2-3 July 2008, Sheffield, UK.

2006

Khokhar, A.Z., De La Rue, R.M. , and Johnson, N.P. (2006) Imprinting on synthetic opal by applying uniaxial pressure 21. Micro and Nano Letters, 1 (1). pp. 43-46. ISSN 1750-0443 (doi:10.1049/mnl:20065006)

De La Rue, R.M. et al. (2006) Elements of nanophotonics: photonic crystals, photonic wires, metamaterials and more. In: Conference on Optoelectronic and Microelectronic Materials and Devices (COMMAD 06), 6-8 Dec 2006, Perth, Australia.

Johnson, N, Khokhar, AZ , De La Rue, RM , and McMeekin, S (2006) Split resonantor (SRR) structures on silicon for increased functionality in the infra-red. In: International Workshop on Physics of Photonic Crystals and Metamaterials, Brussels, Belgium.

Johnson, N, Khokhar, AZ , McMeekin, S, Jin, CJ, Chong, HM, and De La Rue, RM (2006) Correlation of split ring resonator resonant features in the near infra red with geometery. In: Photon06 : QEP17, Manchester, UK.

Johnson, N, Khokhar, AZ , McMeekin, S, Jin, CJ, Chong, HM, and De La Rue, RM (2006) The influence of metal type on Split Ring Resonators (SRR) resinant features in the near infra red. In: Progress in Electromagnetics Research Symposium, Tokyo, Japan.

Khokhar, AZ, De La Rue, RM , and Johnson, N (2006) Stibnite inverse opal. In: Photon06 : QEP17, Manchester, UK.

2005

Johnson, N, Chong, HMH, Khokhar, AZ , Mandel, J, and De La Rue, RM (2005) Towards optical (IR) split ring resonators. In: Seminar on Metamaterials and circuit based on SRRs, Barcelona, Spain.

Johnson, N, Jin, CJ, Khokhar, AZ , Gnan, M, Zain, ARM, Chong, HMH, Mandel, J, and De La Rue, RM (2005) Nanophotonic structures: From photonic crystals to metamaterials. In: UNSPECIFIED.

Khokhar, AZ, De La Rue, RM , and Johnson, N (2005) Towards metamaterials from opals. In: International Congress on Optics and Optoelectronics, Warsaw, Poland.

2004

Johnson, N, Khokhar, AZ , and De La Rue, RM (2004) Fabrication scheme for metamaterials based on polystyrene opal photonic crystals. In: Photon 2004, Glasgow, UK.

Johnson, N, Khokhar, AZ , Elgaid, K , Thayne, IG , Drysdale, TD , and Cumming, DRS (2004) Tools for metamaterials applications from GHz to optical frequencies. In: First Workshop of the Metamorphose, Lille-Louvain-la-Neuve, Belgium, France.

Johnson, N, Khokhar, AZ , McLachlan, MA, McComb, DW, and De La Rue, RM (2004) Application of pressure to shift the bandgap in polystyrene based photonic crystals. In: Photonic Crystal Materials and Nanostructures, Strasbourg, France.