High speed quantum well optical detector

Details High speed quantum well optical detector High speed quantum well optical detector

1987-04-27

1988-06-07

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

357 24, H01J 4014

Patent

active

047498501

ABSTRACT:
In response to ultrafast optical signal pulses, it is now possible to generate correspondingly ultrafast electrical signal pulses by employing semiconductor apparatus including at least one quantum well layer electrically biased by a static electric field. Optical signal pulses incident on the quantum well are at a wavelength substantially less than the absorption edge of the quantum well layer or layers. In other words, the incident optical pulses have a means photon energy less than the bandgap energy of the quantum well layer or layers. The electrical signal pulse generated subsists for a period of time substantially equal to the duration of the optical signal pulses incident on the quantum well layer or layers.

REFERENCES:
patent: 3917943 (1975-11-01), Auston
patent: 4494132 (1985-01-01), Kohn
patent: 4525687 (1985-06-01), Chemla
patent: 4546244 (1985-10-01), Miller

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