The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 03, 2001
Filed:
Oct. 30, 1998
Applicant:
Inventors:
Venkatraman Gopalan, State College, PA (US);
Terence E. Mitchell, Los Alamos, NM (US);
Kenji Kitamura, Tsukuba, JP;
Yasunori Furukawa, Tsukuba, JP;
Assignee:
The Regents of the University of California, Los Alamos, NM (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02F 1/355 ;
U.S. Cl.
CPC ...
G02F 1/355 ;
Abstract
Provided are lithium tantalate single-crystal that requires a low voltage of not larger than 10 kV/mm for its ferroelectric polarization inversion and of which the polarization can be periodically inverted with accuracy even at such a low voltage, and a photo-functional device comprising the crystal. The crystal has a molar fraction of Li,O/(Ta,O,+Li,O) of falling between 0.492 and 0.50. The functional device can convert a laser ray being incident thereon or can be used as a physical memory.