7 July 1998 Back-gated metal-semiconductor-metal photodetector
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In this paper we outline work we have recently completed on the novel high speed photodetector which has come to be known as the `back-gated metal-semiconductor-metal' photodetector or BG-MSM for short. This device was first realized by E. Greger et. al. and us. Recent theoretical work by Hurd et. al. provided a sound basis by which to test the device against a model. The work presented here clearly indicates that the main conclusion of Hurd et. al. is sound. That conclusion was that the main response speed gain obtained by the back-gating is obtained by simply earthing the back contact. As well as this confirmation we have found strong dependence of the peak height of the response on the back gating voltage and a very strong position dependence of the excitation spot on the response particularly at low applied fields. We conclude that the back gating is an advantage over the conventional metal-semiconductor-metal photodetector and needs to be studied more extensively both theoretically and experimentally using devices capable of operation at above 100 GHz.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Anthony J. Vickers, Hamid R. Mashayekhi, "Back-gated metal-semiconductor-metal photodetector", Proc. SPIE 3283, Physics and Simulation of Optoelectronic Devices VI, (7 July 1998); doi: 10.1117/12.316652; https://doi.org/10.1117/12.316652

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