Multicolor infrared photodetector

Details Multicolor infrared photodetector Multicolor infrared photodetector

H - Electricity

01

L

345/14

H01L 31/00 (2006.01) H01L 31/0352 (2006.01)

Patent

CA 2038844

A multicolor infrared detection device comprising a number of doped quantum well structural units. Each unit consists of a thick well and a thin well separated by a thin barrier. This arrangement produces strong coupling. Infrared radiation incident on the device gives rise to intersubband absorption. For each transition a photosignal results which allows the detection of a plurality of incident frequencies.

L'invention est un dispositif de détection d'une gamme de rayonnements infrarouges qui comprend un certain nombre d'unités structurelles à puits quantiques dopés. Chaque unité comprend un puits large et un puits étroit qui sont séparés par une barrière étroite. Cette structure produit un couplage fort. Le rayonnement infrarouge incident est absorbé entre les sous-bandes. Chaque transition engendre un signal lumineux qui permet de détecter les rayonnements incidents, lesquels ont des fréquences variables.

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