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132. (US5004325) Optical processing using a multilayer heterostructure

Application Number: 07465274 Application Date: 16.01.1990
Publication Number: 5004325 Publication Date: 02.04.1991
Grant Number: 5004325 Grant Date: 02.04.1991
Publication Kind : A
IPC:
G02F 1/017
G PHYSICS
02
OPTICS
F
DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1
Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
01
for the control of the intensity, phase, polarisation or colour
015
based on semiconductor elements with at least one potential jump barrier, e.g. PN, PIN junction
017
Structures with periodic or quasi periodic potential variation, e.g. superlattices, quantum wells
CPC:

Applicants: AT&T Bell Laboratories
Inventors: Glass Alastair M.
Knox Wayne H.
Nolte David D.
Agents: Finston M. I.
Priority Data:
Title: (EN) Optical processing using a multilayer heterostructure
Abstract: front page image
(EN)

An electro-optic medium, useful for image processing, is formed by creating a distribution of deep impurity levels over essentially all the lateral extent of a multilayer heterostructure. This treatment renders the heterostructure semi-insulating, and as a consequence, individual image-resolution elements are isolated. Described is an optical system comprising such an electro-optic medium.