Nonbiased bistable optical device having a lower mirror having a

Details Nonbiased bistable optical device having a lower mirror having a Nonbiased bistable optical device having a lower mirror having a

1995-05-25

1997-04-22

Allen, Stephone

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

2502141, 250214LS, 377102, 257 21, H01J 4014

Patent

active

056231407

ABSTRACT:
Disclosed is a nonbiased bistable optical device and a method for fabricating the device, which has a semi-insulating GaAs substrate; a lower mirror having a plurality of reflecting layers which are repeatedly formed on said substrate at least more than twelve times, each of said reflecting layers having a first reflecting film having a first refractive index on said substrate and a second reflecting film a second refractive index different from the first refractive index; a first contact layer formed on the lower mirror; a first buffer layer formed on the first contact layer; a multiple quantum well(MQW) having a plurality of shallow layers which are repeatedly formed, each of said shallow layers having a barrier and a shallow quantum well; a second buffer layer grown on said MQW; and a second contact layer formed on said second buffer layer. The device has an excellent bistablity even without an external applied voltage.

REFERENCES:
patent: 4546244 (1985-10-01), Miller
patent: 4904858 (1990-02-01), LaMarche
patent: 4914286 (1990-04-01), Chirovsky et al.
patent: 4952791 (1990-08-01), Hinton et al.
patent: 5233184 (1993-08-01), Chirovsky et al.
patent: 5424559 (1995-06-01), Kasahara
patent: 5426312 (1995-06-01), Whitehead

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