Optical detector and amplifier based on tandem semiconductor dev

Details Optical detector and amplifier based on tandem semiconductor dev Optical detector and amplifier based on tandem semiconductor dev

1986-10-09

1988-04-19

Sikes, William L.

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

357 2, 357 15, 250211J, 250211R, H01L 2714, H01L 3100

Patent

active

047393831

ABSTRACT:
If a semiconductor device is prepared so that it contains a photoconductive region in electrical series with a photovoltaic region, (i.e., a Schottky barrier or p-n junction) it can function as an optical amplifier and detector. When weak ac light plus an intense dc light are focused on this sample in an appropriate manner, the detected ac electric current will correspond to the intensity of the dc light but have the phase of the ac light; thus a weak ac light signal is effectively amplified, or a dc light signal is converted into an ac electrical signal capable of synchronous detection.

REFERENCES:
patent: 4297720 (1981-10-01), Nishizawa et al.
patent: 4387265 (1983-06-01), Dalal
Woodall et al., IBM Disclosure Bulletin, "Differential Phototransistor", Feb. 1970, vol. 12, No. 9, p. 1486.

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