Active solid-state devices (e.g. – transistors – solid-state diode – Responsive to non-electrical signal – Electromagnetic or particle radiation
Patent
1994-11-03
1997-02-04
Saadat, Mahshid
Active solid-state devices (e.g., transistors, solid-state diode
Responsive to non-electrical signal
Electromagnetic or particle radiation
257440, 257 35, 505237, 359240, 359886, 359891, H01L 310232, G02F 101, G02B 522, H01B 1200
Patent
active
056001720
ABSTRACT:
A surface of a thin film superconductor element is coated with a layer containing pre-selected dye, or multiple dyes, alone or in combination with intermediate reflective coatings (best mode), which, when maintained near T.sub.c, upon exposure to a selected frequency of light acts as a narrow bandwidth absorber to change the resistive property of the underlying superconductor following energy transfer from the dye to the superconductor. The resistance change is electronically detectable to function as a wavelength selective high speed optoelectronic switch or sensor element. A plurality of elements can be arrayed with each element junction being sensitized by overcoating with a different dye layer, either alone or in combination with an underlying reflective coating, so that upon exposure to a broad spectrum or polychromic light source, the individual junctions will independently be switched or not depending on the wavelength to which the superconductor junction is tuned by the pre-selected dye, thereby permitting multiplexed photo-optical message transmission and detection. For example, a single optical fiber may carry several signals simultaneously, each of which is encoded in a different color (.lambda.) and transmitted as a polychromic beam. The array distinguishes between signals as each detector is tuned to a selected encoded light color.
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Jurbergs David C.
McDevitt John T.
Electric Power Research Institute
Saadat Mahshid
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