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Lithium niobate single-crystal and photo-functional device

United States Patent

February 27, 2001
View the Complete Patent at the US Patent & Trademark Office
Los Alamos National Laboratory - Visit the Technology Transfer Division Website
Provided are lithium niobate single-crystal that requires a low voltage of not larger than 10 kV/nm 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.sub.2 O/(Nb.sub.2 O.sub.5 +Li.sub.2 O) of falling between 0.49 and 0.52. The photo-functional device can convert a laser ray being incident thereon.
Gopalan; Venkatraman (State College, PA), Mitchell; Terrence E. (Los Alamos, NM), Kitamura; Kenji (Tsukuba, JP), Furukawa; Yasunori (Tsukuba, JP)
The Regents of the University of California (Los Alamos, NM)
09/ 143,568
August 28, 1998
This invention was made with government support under Contract No. W-7405-ENG-36 awarded by the U.S. Department of Energy. The government has certain rights in the invention.