4 December 1998 Broadband impedance-matched metal-semiconductor-metal photodetector arrays
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Abstract
An electrically interconnected, linear array of photodetectors is a useful component for several optoelectronic systems applications. Traveling-wave concepts were employed in matching arrays of metal-semiconductor- metal photodetectors to a 50 (Omega) load, over a broad bandwidth. The photodetectors are embedded in a microstrip transmission line, to form a periodically loaded structure. The bias of each detector is independently controllable. Such periodic structures can be designed to exhibit specified characteristic impedance, and to be non-dispersive up to very high frequencies. With proper matching, each photodetector exhibits broadband response into an external load. Experimentally, a monolithic array of eight metal- semiconductor-metal photodetectors, attached to a microstrip bus, is shown to have uniform 12 GHz bandwidth. A model for the array is discussed, and theoretical and experimental results are in good agreement. Applications of broadband photodetector arrays are also discussed.
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Ray G. DeCorby, Ray G. DeCorby, Alan J. P. Hnatiw, Alan J. P. Hnatiw, Dave W. Boertjes, Dave W. Boertjes, James N. McMullin, James N. McMullin, R. Ian MacDonald, R. Ian MacDonald, } "Broadband impedance-matched metal-semiconductor-metal photodetector arrays", Proc. SPIE 3491, 1998 International Conference on Applications of Photonic Technology III: Closing the Gap between Theory, Development, and Applications, (4 December 1998); doi: 10.1117/12.328753; https://doi.org/10.1117/12.328753
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