Phototransistor device

Details Phototransistor device Phototransistor device

1987-02-17

1989-05-23

James, Andrew J.

Coherent light generators

Particular component circuitry

Optical pumping

357 4, 357 16, 357 30, 357 17, 372 50, 350354, H01L 3112, H01L 2712, H01S 319, G02B 523

Patent

active

048335118

ABSTRACT:
An improved phototransistor device comprises a collector region and a base region respectively provided on the opposite sides of a multiple quantum well, and an emitter region provided on one side of the base region. A reverse-biased voltage is applied across the multiple quantum well while incident light is input to be absorbed in the multiple quantum well thereby producing photocurrent therein. In the improved phototransistor device, a higher photocurrent level is obtained in accordance with the amplification thereof even if the incident light is very small in its power.

REFERENCES:
patent: 4525687 (1985-06-01), Chemla et al.
patent: 4716449 (1987-12-01), Miller
Sze, S. M., "Phototransistor" In:Physics of Semiconductor Device (N.Y., Wiley, 1981) pp. 783-787.
Miller et al., "Novel Hybrid Optically Bistable Switch . . . " Appl. Phys. Lett 45 (1), Jul. 1, 1984, pp. 13-15.

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