Method of bistable optical information storage using antiferroelectric phase PLZT ceramics

Patent · Tue Jul 31 00:00:00 EDT 1990

OSTI ID:7013761

Land, C E

A method for bistable storage of binary optical information includes an antiferroelectric (AFE) lead lanthanum zirconate titanate (PLZT) layer having a stable antiferroelectric first phase and a ferroelectric (FE) second phase obtained by applying a switching electric field across the surface of the device. Optical information is stored by illuminating selected portions of the layer to photoactivate an FE to AFE transition in those portions. Erasure of the stored information is obtained by reapplying the switching field. 8 figs.

• DOE Contract Number: AC04-76DP00789
• Assignee: SNL; EDB-94-121041
• Patent Number(s): A; US 4945514
• Application Number: PPN: US 7-200104
• OSTI ID: 7013761
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
990200* -- Mathematics & Computers
COMPUTERS
DESIGN
EQUIPMENT
LANTHANUM COMPOUNDS
LEAD COMPOUNDS
MEMORY DEVICES
OPTICAL COMPUTERS
OPTICAL EQUIPMENT
OXYGEN COMPOUNDS
PLZT
RARE EARTH COMPOUNDS
TITANATES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
ZIRCONATES
ZIRCONIUM COMPOUNDS