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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

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  • Thermal Profiles Within the Channel of Planar Gunn Diodes Using Micro-Particle Sensors

    Glover, J., Khalid, A., Cumming, D., Dunn, G. M., Kuball, M., Bajo, M. M., Oxley, C. H.
    IEEE Electron Device Letters, vol. 38, no. 9, pp. 1325-1327
    Contributions to Journals: Articles

  • Potential Well Barrier Diodes for Submillimeter Wave and High Frequency Applications

    Akura, M., Dunn, G., Missous, M., Sexton, J.
    IEEE Electron Device Letters, vol. 38, no. 4, pp. 438-440
    Contributions to Journals: Articles

  • Micro-coolers fabricated as a component in an integrated circuit

    Glover, J., Khalid, A., Stephen, A., Dunn, G., Cumming, D., Oxley, C. H.
    Semiconductor Science and Technology, vol. 30, no. 1, 015005
    Contributions to Journals: Articles

  • Experimentally estimated dead space for GaAs and InP based planar Gunn diodes

    Maricar, M. I., Khalid, A., Dunn, G., Cumming, D., Oxley, C. H.
    Semiconductor Science and Technology, vol. 30, no. 1, 114502
    Contributions to Journals: Articles

  • On wafer thermal characterization of miniature gallium arsenide microcoolers with thermal loading from DC probes

    Glover, J., Khalid, A., Cumming, D. R. S., Bajo, M. M., Kuball, M., Stephen, A., Dunn, G. M., Oxley, C. H.
    Microwave and Optical Technology Letters, vol. 56, no. 11, pp. 2699-2700
    Contributions to Journals: Articles

  • Terahertz oscillations in an In0.53Ga0.47As submicron planar Gunn diode

    Khalid, A., Dunn, G. M., Macpherson, R. F., Thoms, S., Macintyre, D., Li, C., Steer, M. J., Papageorgiou, V., Thayne, I. G., Kuball, M., Oxley, C. H., Montes Bajo, M., Stephen, A., Glover, J., Cumming, D. R. S.
    Journal of Applied Physics, vol. 115, no. 11, 114502
    Contributions to Journals: Articles

  • Micro-cooler Enhancements by Barrier Interface Analysis

    Stephen, A., Dunn, G. M., Glover, J., Oxley, C. H., Bajo, M. M., Cumming, D. R. S., Khalid, A., Kuball, M.
    AIP Advances, vol. 4, no. 2, 027105
    Contributions to Journals: Articles

  • Improvements in thermionic cooling through engineering of the heterostructure interface using Monte Carlo simulations

    Stephen, A., Dunn, G. M., Oxley, C. H., Glover, J., Montes Bajo, M., Cumming, D. R. S., Khalid, A., Kuball, M.
    Journal of Applied Physics, vol. 114, no. 4, 043717
    Contributions to Journals: Articles

  • Impact ionisation electroluminescence in planar GaAs-based heterostructure Gunn diodes: Spatial distribution and impact of doping non-uniformities

    Montes Bajo, M., Dunn, G., Stephen, A., Khalid, A., Cumming, D., Oxley, C., Glover, J., Kuball, M.
    Journal of Physics D: Applied Physics, vol. 113, no. 12, 124505
    Contributions to Journals: Articles

  • A 218-GHz second-harmonic multiquantum well GaAs-based planar Gunn diodes

    Khalid, A., Li, C., Papageorgiou, V., Pilgrim, N. J., Dunn, G. M., Cumming, D. R. S.
    Microwave and Optical Technology Letters, vol. 55, no. 3, pp. 686-688
    Contributions to Journals: Articles
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