Photochemistry of molecular systems for optical 3D storage memory

The photochemistry, kinetics and spectra of several spiropyran molecules have been studied. The transient species of the photochromic reactions and precursors have been identified and the rate of formation and decay measured. We also present means for the utilization of spiropyrans in writing and accessing information in 3D volume optical memory.

[1]  J. B. Flannery.  Photo- and thermochromic transients from substituted 1',3',3'-trimethylindolinobenzospiropyrans , 1968 .

[2]  N. Ernsting,et al.  The primary photochemical reaction step of unsubstituted indolino-spiropyrans , 1990 .

[3]  R. Becker,et al.  Photophysics, photochemistry and kinetics of indolinospiropyran derivatives and an indolinothiospiropyran , 1986 .

[4]  F. Wilkinson,et al.  Photochromism of spiropyrans. Part 1.—Mechanism of photocolouration , 1973 .

[5]  Gary C. Bjorklund,et al.  Novel second‐order nonlinear optical polymers via chemical cross‐linking‐induced vitrification under electric field , 1989 .

[6]  G. B. Tolstorozhev,et al.  Formation of a cis-cisoid isomer and the nature of the photochemically active electronically excited state of the closed form of spiropyrans , 1987 .

[7]  V. A. Kuz’min,et al.  Photochemistry of spiropyrans of the dithiolane series with polycondensed chromene fragments , 1989 .

[8]  T. Orlowski,et al.  Dynamics of the spiropyran-merocyanine conversion in solution , 1983 .

[9]  R. Birge.  Molecular and Biomolecular Electronics , 1994 .

[10]  Y. Hirshberg,et al.  PHOTOCHROMISM IN SPIROPYRANS. PART V.1 ON THE MECHANISM OF PHOTOTRANSFORMATION , 1962 .

[11]  K. Dyumaev,et al.  The Photochemistry and Photophysics of Spiropyrans , 1987 .

[12]  J. Timmermans.  The physico-chemical constants of binary systems in concentrated solutions , 1959 .

[13]  R. Becker,et al.  Vibronic Effects in Photochemistry—Competition between Internal Conversion and Photochemistry , 1969 .

[14]  M. Alfimov,et al.  Picosecond Flash Photolysis of Photochromic Spiropyrans , 1984 .

[15]  S Hunter,et al.  Potentials of two-photon based 3-D optical memories for high performance computing. , 1990, Applied optics.

[16]  T. Krasieva,et al.  Photochemistry of spiropyrans of the dihydroisobenzofuran series , 1988 .

[17]  N. Ernsting,et al.  PHOTOCHEMICAL RING-OPENING REACTION OF INDOLINOSPIROPYRANS STUDIED BY SUBPICOSECOND TRANSIENT ABSORPTION , 1991 .

[18]  D A Parthenopoulos,et al.  Three-Dimensional Optical Storage Memory , 1989, Science.

[19]  Peter M. Rentzepis,et al.  Two-photon volume information storage in doped polymer systems , 1990 .

[20]  J P Huignard,et al.  Experimental holographic read-write memory using 3-d storage. , 1974, Applied optics.

[21]  David J. Williams,et al.  Introduction to Nonlinear Optical Effects in Molecules and Polymers , 1991 .

[22]  Prasad,et al.  Observation of photorefractivity in a fullerene-doped polymer composite. , 1992, Physical review. B, Condensed matter.

[23]  F. Wilkinson,et al.  Conferences and Meetings , 1966, British medical journal.

[24]  D. Cassidy,et al.  Photochemical etching of n‐InP as a function of temperature and illumination , 1990 .

[25]  J. Strickler,et al.  Three-dimensional optical data storage in refractive media by two-photon point excitation. , 1991, Optics letters.

[26]  A. Dvornikov,et al.  Flash photolysis study of the mechanism of photochromism of naphtho[1,8-b,c] furan spiropyrans , 1982 .