2012

Montes, M., Dunn, G., Stephen, A., Khalid, A. , Li, C. , Cumming, D. , Oxley, C.H., Hopper, R.H., and Kuball, M. (2012) Reduction of impact ionization in GaAs-based planar gunn diodes by anode contact design. IEEE Transactions on Electron Devices, 59 (3). pp. 654-660. ISSN 0018-9383 (doi:10.1109/TED.2011.2177094)

Saha, S., Grant, J. , Khalid, A. , and Cumming, D. (2012) Terahertz frequency-domain spectroscopy method for vector characterization of liquid using an artificial dielectric. IEEE Transactions on Terahertz Science and Technology, 2 (1). pp. 113-122. ISSN 2156-342X (doi:10.1109/TTHZ.2011.217717)

2011

Li, C., Khalid, A. , Caldwell, S.H.P., Holland, M. , Dunn, G.M., Thayne, I.G. , and Cumming, D.R.S. (2011) Design, fabrication and characterization of In_0.23Ga_0.77As-channel planar Gunn diodes for millimeter wave applications. Solid-State Electronics, 64 (1). pp. 67-72. ISSN 0038-1101 (doi:10.1016/j.sse.2011.07.008)

Li, C., Lok, L.B. , Khalid, A. , Thayne, I.G. , and Cumming, D.R.S. (2011) Investigation of loading effect on power performance for Planar Gunn diodes using load-pull measurement technique. IEEE Microwave and Wireless Components Letters, 21 (10). pp. 556-558. ISSN 1531-1309 (doi:10.1109/LMWC.2011.2163496)

Li, C., Khalid, A. , Caldwell, S.H.P. , Pilgrim, N.J., Holland, M.C. , Dunn, G.M., and Cumming, D.R.S. (2011) Enhancement of power and frequency in Planar Gunn diodes by introducing extra delta-doping layers. Microwave and Optical Technology Letters, 53 (7). pp. 1624-1626. ISSN 0895-2477 (doi:10.1002/mop.26071)

Li, C., Khalid, A. , Caldwell, S.H.P., Pilgrim, N.J., Holland, M.C. , Dunn, G.M., and Cumming, D.R.S. (2011) Enhancement of power and frequency in Planar Gunn diodes by introducing extra delta-doping layers. Microwave and Optical Technology Letters, 53 (7). pp. 1624-1626. ISSN 0895-2477 (doi:10.1002/mop.26071)

Grant, J., Ma, J., Saha, S. , Lok, L.B. , Khalid, A. , and Cumming, D.R.S. (2011) Polarization insensitive terahertz metamaterial absorber. Optics Letters, 36 (8). pp. 1524-1526. ISSN 0146-9592 (doi:10.1364/OL.36.001524)

Khalid, A., Li, C. , Holland, M.C. , Gunn, D.M., and Cumming, D.R.S. (2011) Novel composite contact design and fabrication for planar Gunn devices for millimeter-wave and terahertz frequencies. Physica Status Solidi C, 8 (2). pp. 316-318. ISSN 1862-6351 (doi:10.1002/pssc.201000529)

Pilgrim, N.J., Khalid, A. , Li, C. , Dunn, G.M., and Cumming, D.R.S. (2011) Contact shaping in planar Gunn diodes. Physica Status Solidi C, 8 (2). pp. 313-315. ISSN 1862-6351 (doi:10.1002/pssc.201000539)

Li, C., Lok, L.B. , Khalid, A. , and Cumming, D.R.S. (2011) Coplanar ring divider with wideband high isolation performance. Progress In Electromagnetics Research Letters, 25 . pp. 1-10. ISSN 1937-6480

Ma, Y., Chen, Q. , Grant, J. , Saha, S.C. , Khalid, A. , and Cumming, D.R.S. (2011) A terahertz polarization insensitive dual band metamaterial absorber. Optics Letters, 36 (6). pp. 945-947. ISSN 0146-9592 (doi:10.1364/OL.36.000945)

2010

Saha, S., Ma, Y. , Grant, J. , Khalid, A. , and Cumming, D. (2010) Imprinted quarter wave plate at terahertz frequency. Journal of Vacuum Science and Technology. Part B. Microelectronics and Nanometer Structures, 28 (6). C6M83-C6M87. ISSN 1071-1023 (doi:10.1116/1.3497023)

Ma, Y., Chen, Q. , Khalid, A.H. , Saha, S.C. , and Cumming, D. R. S. (2010) Terahertz dual-band resonator on silicon. Optics Letters, 35 (4). pp. 469-471. ISSN 0146-9592 (doi:10.1364/OL.35.000469)

Li, C., Khalid, A. , Lok, L.B. , Pilgrim, N.J., Holland, M. , Dunn, G.M., and Cumming, D. (2010) An In0.23Ga0.77As-based pHEMT-like Planar Gunn Diode Operating at 116 GHz. In: 35th International Conference on Infrared, Millimeter and Terhertz Waves, 5 -10 September 2010, Rome, Italy.

Li, C., Khalid, A. , Lok, L.B. , Pilgrim, N.J., Holland, M. , Dunn, G.M., and Cumming, D. (2010) An In0.23Ga0.77As-based pHEMT-like Planar Gunn Diode Operating at 116 GHz. In: 35th International Conference on Infrared, Millimeter and Terahertz Waves, 5 - 10 September 2010, Rome, Italy.

Lok, L.B., Li, C. , Khalid, A. , Pilgrim, N.J., Dunn, G.M., and Cumming, D. (2010) Demonstration of the Self-Mixing Effect with a Planar Gunn Diode at Millimeter-Wave Frequency. In: 35th International Conference on Infrared, Millimeter and Terahertz Waves, 5 -10 September 2010, Rome, Italy.

Ma, Y., Khalid, A. , Saha, S.C. , Grant, J.P. , and Cumming, D.R.S. (2010) THz band pass filter on plastic substrates and its application on biological sensing. In: IEEE Photonics Society Winter Topicals Meeting Series, Jan 11-13, 2010, Majorca, Spain.

Saha, S.C., Ma, Y. , Grant, J.P. , Khalid, A. , and Cumming, D.R.S. (2010) Fabrication of Silicon Quarter Wave Plate at Terahertz Frequency. In: IEEE Photonics Society Winter Topicals Meeting Series, Jan 11-13, 2010, Majorca, Spain.

Saha, S.C., Ma, Y. , Grant, J.P. , Khalid, A. , and Cumming, D.R.S. (2010) Imprinted terahertz artificial dielectric quarter wave plates. Optics Express, 18 (12). pp. 12168-12175. ISSN 1094-4087 (doi:10.1364/OE.18.012168)

Saha, S.C., Ma, Y. , Grant, J.P. , Khalid, A. , and Cumming, D.R.S. (2010) Low-loss terahertz artificial dielectric birefringent quarter-wave plates. IEEE Photonics Technology Letters, 22 (2). pp. 79-81. ISSN 1041-1135 (doi:10.1109/LPT.2009.2036242)

2009

Khalid, A., Li, C. , Dunn, G., Pilgrim, N., and Cumming, D.R.S. (2009) Observation of multiple domains in a planar Gunn diode. In: EuMC 2009: European Microwave Conference: 28 September - 2 October 2009, Rome, Italy. IEEE Computer Society, Piscataway, N.J., USA, pp. 298-300. ISBN 9781424447497

Li, C., Khalid, A. , Pilgrim, N., Holland, M.C. , Dunn, G., and Cumming, D.R.S. (2009) Novel planar Gunn diode operating in fundamental mode up to 158 GHz. Journal of Physics: Conference Series, 193 (1). 012029. ISSN 1742-6588 (doi:10.1088/1742-6596/193/1/012029)

Ma, Y., Khalid, A. , Drysdale, T.D. , and Cumming, D.R.S. (2009) Direct fabrication of terahertz optical devices on low-absorption polymer substrates. Optics Letters, 34 (10). pp. 1555-1557. ISSN 0146-9592 (doi:10.1364/OL.34.001555)

Pilgrim, N.J., Macpherson, R.F., Khalid, A. , Dunn, G.M., and Cumming, D.R.S. (2009) Multiple and broad frequency response Gunn diodes. Semiconductor Science and Technology, 24 (10). ISSN 0268-1242 (doi:10.1088/0268-1242/24/10/105010)

Shi, X.H., Cleary, A., Khalid, A. , and Cumming, D.R.S. (2009) Multiple plasmon resonances at terahertz frequencies from arrays of arsenic doped silicon dots. Microelectronic Engineering, 86 (4-6). pp. 1111-1113. ISSN 0167-9317 (doi:10.1016/j.mee.2008.12.070)

2008

Pilgrim, N.J., Khalid, A. , Dunn, G.M., and Cumming, D.R.S. (2008) Gunn oscillations in planar heterostructure diodes. Semiconductor Science and Technology, 23 (7). 075013. ISSN 0268-1242 (doi:10.1088/0268-1242/23/7/075013)

2007

Khalid, A.H., Pilgrim, N.J., Dunn, G.M., Holland, M.C., Stanley, C.R. , Thayne, I.G. , and Cumming, D.R.S. (2007) A planar Gunn diode operating above 100 GHz. IEEE Electron Device Letters, 28 (10). pp. 849-851. ISSN 0741-3106 (doi:10.1109/LED.2007.904218)

Khalid, A.H., Dunn, G.M., Pilgrim, N., Stanley, C.R. , Thayne, I.G. , Holland, M., and Cumming, D.R.S. (2007) Planar Gunn-type triode oscillator at 83 GHz. Electronics Letters, 43 (15). pp. 837-838. ISSN 0013-5194 (doi:10.1049/el:20071099)

2006

Drysdale, TD, Khalid, A , Sheridan, A, Walsby, E, and Cumming, DRS (2006) Superhuman Vision - Seeing with Terahertz. In: Royal Society Summer Science Exhibition, Glasgow,UK.

Drysdale, TD, Khalid, A , Sheridan, A, Walsby, E, and Cumming, DRS (2006) Superhuman Vision- Seeing with Terahertz. In: Royal Society Summer Science Exhibition, Glasgow, UK.

Drysdale, TD, Khalid, A , Sheridan, A, Walsby, E, and Cumming, DRS (2006) Superhuman vision. In: Science Day, Buckingham Palace, London, UK.

2001

Rezazadeh, A.A., Khalid, A.H. , and Sotoodeh, M. (2001) Reliability investigation of implanted microwave InGaP/GaAs HBTs. Materials Science and Engineering: B Advanced Functional Solid-State Materials, 80 (1-3). pp. 274-278. ISSN 0921-5107 (doi:10.1016/S0921-5107(00)00654-1)

2000

Sotoodeh, M., Khalid, A.H. , and Rezazadeh, A.A. (2000) Empirical low-field mobility model for III-V compounds applicable in device simulation codes. Journal of Applied Physics, 87 (6). pp. 2890-2900. ISSN 0021-8979 (doi:10.1063/1.372274)

Sotoodeh, M., Sozzi, L., Vinay, A., Khalid, A.H. , and Menozzi, R. (2000) Stepping toward standard methods of small-signal parameter extraction for HBT's. IEEE Transactions on Electron Devices, 47 (6). pp. 1139-1151. ISSN 0018-9383

1999

Rezazadeh, A.A., Bashar, S.A., Sheng, H., Amin, F.A., Khalid, A.H. , Sotoodeh, M., Fantini, F., and Liou, J.J. (1999) Reliability investigation of InGaP/GaAs HBTs under current and temperature stress. Microelectronics Reliability, 39 (12). pp. 1809-1816. ISSN 0026-2714 (doi:10.1016/S0026-2714(99)00189-4)

Sotoodeh, M., Khalid, A.H. , Sheng, H., Amin, F.A., Gokdemir, T., Rezazadeh, A.A., Knights, A.P., and Button, C.C. (1999) Direct extraction and numerical simulation of the base and collector delay times in double heterojunction bipolar transistors. IEEE Transactions on Electron Devices, 46 (6). pp. 1081-1086. ISSN 0018-9383 (doi:10.1109/16.766867)

1998

Budimir, D., Robertson, I.D., Khalid, A.H. , and Rezazadeh, A.A. (1998) CPW low-pass filters on silicon substrate for multilayer MMICs. Microwave and Optical Technology Letters, 17 (2). pp. 125-128. ISSN 0895-2477

Sotoodeh, M., Khalid, A.H. , and Rezazadeh, A.A. (1998) DC characterisation of HBTs using the observed kink effect on the base current. Solid-State Electronics, 42 (4). pp. 531-539. ISSN 0038-1101 (doi:10.1016/S0038-1101(97)00214-1)

1997

Budimir, D., Robertson, I.D., Khalid, A.H. , and Rezazadeh, A.A. (1997) Multilayer CPW lowpass filters on GaAs/Si MMICs. In: 1997 Workshop on High Performance Electron Devices for Microwave and Optoelectronic Applications, 1997. EDMO. IEEE, pp. 315-320. ISBN 078034135X

Gokdemir, T., Economides, S.B., Khalid, A. , Rezazadeh, A.A., and Robertson, I.D. (1997) Design and performance of GaAs MMIC CPW baluns using overlaid and spiral couplers. In: IEEE MTT-S International Microwave Symposium, 8-13 June 1997, Denver.

Gokdemir, T., Karacaoglu, U., Budimir, D., Economides, S.B., Khalid, A. , Rezazadeh, A.A., and Robertson, I.D. (1997) Multilayer passive components for uniplanar Si/SiGe MMICs. In: IEEE Radio Frequency Integrated Circuits (RFIC) Symposium, 8-11 June 1997, Denver, CO.

Khalid, A.H., Sotoodeh, M., and Rezazadeh, A.A. (1997) Planar self-aligned microwave InGaP/GaAs HBTs using He+/O+ implant isolation. In: Workshop on High Performance Electron Devices for Microwave and Optoelectronic Applications (EDMO), 24-25 Nov 1997, London, UK.

Sanchez-Hernandez, D., Karacaoglu, U., Gokdemir, T., Khalid, A.H. , Rezazadeh, A.A., Ferrando, M., de los Reyes, E., and Robertson, I.D. (1997) CAD techniques for the electromagnetic design of monolithic millimetre-wave integrated circuits. Annales Des Télécommunications, 52 (3-4). pp. 164-173. ISSN 0003-4347

Sotoodeh, M., Khalid, A.H. , and Rezazadeh, A.A. (1997) Numerical modelling of AlGaAs/GaAs and InGaP/GaAs single and double HBTs. In: Workshop on High Performance Electron Devices for Microwave and Optoelectronic Applications (EDMO), 24-25 Nov 1997, London, UK.

1996

Khalid, A.H., and Rezazadeh, A.A. (1996) Fabrication and characterisation of transparent-gate field effect transistors using indium tin oxide. IEE Proceedings - Optoelectronics, 143 (1). pp. 7-11. ISSN 1350-2433 (doi:10.1049/ip-opt:19960083)

Boroumand, F.A., Khalid, A.H. , Hopkinson, M., Swanson, J.G., and Fontaine, C. (1996) Observations of low frequency admittance between isolated GaAs structures formed by ion implantation and by epitaxy on epitaxial buffer layers prepared at high and low temperatures. In: Semiconducting and Insulating Materials 1996: Proceedings of the 9th Conference on Semiconducting and Insulating Materials (SIMC'9), 29 April - 3 May 1996, Toulouse, France. IEEE, New York, USA, pp. 51-54. ISBN 9780780331792