MOPS, a magnetohyphen;optichyphen;photoconductor sandwich for optical information storage

摘要

A magnetohyphen;optic photoconductor sandwich, called MOPS, has been assessed as a memory medium for optical information storage. The present version of MOPS is composed of an epitaxial (Gd,Bi)3(Fe,Ga)5O12film and a Cuhyphen;doped CdS photoconductor film between coplanar In2O3/SnO2electrodes. The chip contains 1.4times;105bits, requires 1 mgr;W of optical power at 6328 Aring; for switching a memory cell in a magnetic field of 100 Oe and electric field of 1.2times;104V/cm, exhibits a readhyphen;out contrast of 21thinsp;:thinsp;1 at a readhyphen;out efficiency of 0.1percnt;, and has a cycle time of sim;100 mgr;s. MOPS has not been degraded by 107switching cycles of arbitrary memory cells. No cross talk between neighboring bit sites has been observed.