Capacitive detector of electromagnetic waves

Details Capacitive detector of electromagnetic waves Capacitive detector of electromagnetic waves

1990-10-09

1992-02-04

Mintel, William

357 4, 357 16, H01L 2714

Patent

active

050863274

ABSTRACT:
A capacitive detector of electromagnetic waves, comprises three electron levels, wherein an internal barrier prevents a strong coupling between two levels of two neighboring wells. During an irradiation, the electrons are excited from a first level to a second level. The electrons then relax towards a third level until they relax, by tunnel effect, towards the first level. During the transition from the first level towards the third level, a dipole is created. This dipole can be detected by a detector, through the measurement of a potential difference at the terminals of the device.

REFERENCES:
patent: 4745452 (1988-05-01), Sollner
patent: 4905056 (1990-02-01), Berndt et al.
patent: 4987458 (1991-01-01), Gaylord et al.
Choi et al., "Multiple Quantum Well 10 .mu.m GaAs/Al.sub.x Ga.sub.1-x As Infrared Detector with Improved Responsivity", Applied Physics Letters, vol. 50 (1987), Jun. 22, 1987, pp. 1814-1816.
Chang et al., "Infrared Optical Devices of Layered Structure", IBM Technical Disclosure Bulletin, vol. 20, No. 5, Oct. 1977, pp. 2019-20.

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