Dr Geoffrey Dunn

Dr Geoffrey Dunn
Dr Geoffrey Dunn

Dr Geoffrey Dunn

Senior Lecturer

About

Biography

Head of physics. After his first degree in astrophysics, he obtained a PhD in Positron physics at London University in 1990. Since then he has developed an extensive suite of semiconductor device Monte Carlo simulation software and has researched into photodetectors, impact ionisation and Gunn oscillators working at Helsinki, Norwich, Sheffield and Loughborough Universities. Currently he is working to develop a planar Gunn diode technology for the generation of T-Rays (THz frequency radiation) and investigate novel cooling methods for semiconductor devices.

Publications

Page 3 of 5 Results 21 to 30 of 48

  • InGaAs planar gunn diodes operating at a fundamental frequency of 164 GHz

    Khalid, A., Li, C., Papageogiou, V., Dunn, G. M., Steer, M. J., Thayne, I. G., Kuball, M., Oxley, C. H., Montes Bajo, M., Stephen, A., Glover, J., Cumming, D. R. S.
    IEEE Electron Device Letters, vol. 34, no. 1, pp. 39-41
    Contributions to Journals: Articles
  • Reduction of impact ionization in GaAs-based planar Gunn diodes by anode contact design

    Montes, M., Dunn, G., Stephen, A., Khalid, A., Li, C., Cumming, D., Oxley, C., Hopper, R., Kuball, M.
    IEEE Transactions on Electron Devices, vol. 59, no. 3, pp. 654-660
    Contributions to Journals: Articles
  • Design, fabrication and characterization of In0.23Ga0.77As-channel planar Gunn diodes for millimeter wave applications

    Li, C., Khalid, A., Paluchowski Caldwell, S. H., Holland, M. C., Dunn, G. M., Thayne, I. G., Cumming, D. R. S.
    Solid State Electronics, vol. 64, no. 1, pp. 67-72
    Contributions to Journals: Articles
  • Enhancement of power and frequency in Planar Gunn diodes by introducing extra delta-doping layers

    Li, C., Khalid, A., Paluchowski Caldwell, S. H., Dunn, G. M., Holland, M. C., Cumming, D. R. S.
    Microwave and Optical Technology Letters, vol. 53, no. 7, pp. 1624-1626
    Contributions to Journals: Articles
  • Novel composite contact design and fabrication for planar Gunn devices for millimeter-wave and terahertz frequencies

    Khalid, A., Li, C., Pilgrim, N. J., Holland, M. C., Dunn, G. M., Cumming, D. R. S.
    physica status solidi (c), vol. 8, no. 2, pp. 316-318
    Contributions to Journals: Articles
  • Multiple and broad frequency response Gunn diodes

    Pilgrim, N. J., Macpherson, R. F., Khalid, A., Dunn, G. M., Cumming, D. R. S.
    Semiconductor Science and Technology, vol. 24, no. 10, 105010
    Contributions to Journals: Articles
  • Planar Gunn-effect devices

    Pilgrim, N. J., Khalid, A., Dunn, G. M., Cumming, D. R. S.
    UK Semiconductors 2009
    Contributions to Conferences: Posters
  • Attribution of Campylobacter infections in northeast Scotland to specific sources by use of multilocus sequence typing

    Strachan, N. J. C., Gormley, F. J., Rotariu, O., Ogden, I. D., Miller, G., Dunn, G. M., Sheppard, S. K., Dallas, J. F., Reid, T. M. S., Howie, H., Maiden, M. C. J., Forbes, K. J.
    The journal of infectious diseases, vol. 199, no. 8, pp. 1205-1208
    Contributions to Journals: Articles
  • Novel planar Gunn diode operating in fundamental mode up to 158 GHz

    Li, C., Khalid, A., Pilgrim, N., Holland, M. C., Dunn, G., Cumming, D. R. S.
    Journal of Physics: Conference Series, vol. 193, no. 1, 012029
    Contributions to Journals: Articles
  • The use of doping spikes in GaN Gunn diodes

    Macpherson, R. F., Dunn, G. M.
    Applied Physics Letters, vol. 93, no. 6, 062103
    Contributions to Journals: Articles
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