公开(公告)号：US3575628A

公开(公告)日：1971-04-20

申请号：US3575628D

申请日：1968-11-26

Applicant: WESTINGHOUSE ELECTRIC CORP

Inventor： WORD JAMES C

IPC: H01J1/34 ,  H01J29/38 ,  H01J39/18 ,  H01J31/50

CPC classification number: H01J1/34 ,  H01J29/38 ,  H01J2201/3423 ,  Y10S148/056 ,  Y10S148/059 ,  Y10S148/065 ,  Y10S148/067 ,  Y10S148/072 ,  Y10S148/15 ,  Y10S438/918

Abstract: Described are transmissive gallium arsenide photocathodes, and optical devices utilizing the same, comprising gallium arsenide epitaxially deposited on a layer of silicon, the gallium arsenide having absorbed into its surface electropositive metal atoms, preferably cesium. In one embodiment of the invention, the gallium arsenide is deposited on a silicon film epitaxially deposited on a transparent sapphire substrate; while in another embodiment, the gallium arsenide is deposited on a thin silicon web having a thickness in the range of about 10 to 25 microns.