The State University of New York

Guang S He

Paras Nath Prasad

Jaroslaw Zieba

Ping Chin Cheng

Shan Jen Pan

Raz Gvishi

Gary E Ruland

Jayant D Bhawalkar

Qingdong Zheng

Chan F Zhao

The present invention relates to a method and system of generating backward stimulated Rayleigh-Bragg scattering by focusing activating radiation through a multi-photon absorbing dye solution, thereby producing coherent output radiation with no measured frequency shift and measured pump threshold values independent of the spectral line width of the input activating radiation.

Backward stimulated Rayleigh-Bragg scattering devices based on multi-photon absorbing materials and their applications

The present invention provides substituted phenanthroline compounds with high two photon absorption cross sections, as well as substituted phenanthroline compounds which additionally have quenched fluorescence emission upon two photon absorption.

Two-photon absorbing materials with quenched emission

Styryl dyes and compositions which exhibit superior two-photon absorption cross-sections and are useful in two-photon pumped cavity lasing, two-photon pumped upconversion lasing, optical power limiting, optical power stabilization, optical signal reshaping, and infrared beam detection and indication are disclosed. Also disclosed are multiphasic nanostructured composites which include a glass having pores, an optically active coating material on the pore surface, and a polymeric material in the pores. These composites are useful in producing multifunctional optical materials, such as broadly tunable lasers. Methods for killing cells and viruses using a photosensitizer and a two-photon upconverting dye are also described. These methods are especially useful to kill cells and viruses in biological materials, such as in photodynamic therapy of tumors and cancers or blood purification protocols. Media and methods for recording data in a three-dimensional matrix which includes a plurality of dye molecules is also described. The data storage methods and media have approximately 10.sup.12 volume elements per square centimeter, and each of the volume elements can store a single bit, digital information, or analog information. The data storage methods and media of the present invention are particularly useful for storing or archiving a series of two-dimensional black and white or color images, such as frames of a movie.

Two-photon upconverting dyes and applications

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Williamsville, NY, United States of America

Guang S He