3 October 2005 A traveling-wave photodetection in high-temperature superconducting parallel plate line on semiconductor substrate
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Abstract
The concept of a traveling-wave photodector based on the integration of semiconductor substrate with high-temperature superconducting (HTS) slabs is proposed for the first time. The photoconductivity effect in semiconducting substrate and the kinetic inductive photoresponse in HTS slabs has been used to obtain a sensitive and broadband optical detection with a large responsivity over a very wide range of electrical frequency spectrum. The analysis of optical wave propagation down the photodetector waveguide is presented in detail by introducing a transcendental equation for optical propagation constant. The photomixing technique is used to excite the photodetector waveguide and the output photo-induced electrical signal is analyzed by means of transmission line theory in frequency domain. The presented analytical and numerical studies of such a photodetector waveguide reveals many interesting device characteristics including high responsivity for high beat electrical frequencies and the possibility of high-power mm-wave signal generation in such a structure.
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A. Hamed Majedi, A. Hamed Majedi, } "A traveling-wave photodetection in high-temperature superconducting parallel plate line on semiconductor substrate", Proc. SPIE 5971, Photonic Applications in Nonlinear Optics, Nanophotonics, and Microwave Photonics, 597121 (3 October 2005); doi: 10.1117/12.628766; https://doi.org/10.1117/12.628766
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