All optics type semiconductor image storage apparatus, and all o

Details All optics type semiconductor image storage apparatus, and all o All optics type semiconductor image storage apparatus, and all o

1997-04-18

2000-06-27

Nelms, David

Static information storage and retrieval

Read/write circuit

Optical

365217, G11C 700

Patent

active

060814705

ABSTRACT:
An all optics type semiconductor image storage apparatus includes a superlative semiconductor device. The superlattice semiconductor device includes a superlattice layer which is formed by alternately laminating a barrier layer and a quantum well layer. The superlattice layer is interposed between two carrier confinement layers, one of which is formed on a surface of a semiconductor substrate. The superlattice semiconductor device has an effect of modulating a light absorbance in the vicinity of an absorption edge by canceling an internal electric field generated by a piezoelectric effect. This piezoelectric effect is due to a distortion occurring when the superlattice layer is formed. An image is stored so that, light incident into the superlattice semiconductor device at a first stable point is substantially transmitted, while light incident into the device at a second stable point is prevented from being substantially transmitted.

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