Martin Marietta Corporation

Claude C Frazier, Iii

Wenpeng Chen

Shekhar Guha

Certain benzophenone derivatives having acentric crystalline space groups are disclosed as second-order nonlinear optical materials. The second harmonic signal of such derivatives is enhanced for compounds containing an electron-donating group attached to one of the benzene rings and which is para relative to the carbonyl group of the benzophenone derivative. Benzophenone hydrazone, 4-aminobenzophenone, and 4-amino-3-nitrobenzophenone are exemplary benzophenone derivatives according to the invention. Also disclosed are nonlinear optical devices which include single crystals of the benzophenone derivatives.

Optical monlinearity of aminobenzophenone derivatives

The present invention relates to a device for optical switching, frequency conversion, and protection of sensory organs and optical and electronic sensors which comprises at least one layer comprising a polymerized transition metal poly-yne.

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Ellicott City, MD, United States of America

Claude C Frazier, Iii