Reversible Photoredox Processing of Transition Metal Oxides

The authors describe a novel laser chemical process having potential for optical data storage and processing applications. Reversible oxygen exchange involving WO{sub 3}, using readily available laser sources offers improved durability and versatility over existing erasable optical data storage media. Being interconvertible using heat and blue-green laser sources, the well known yellow WO{sub 3} and blue W{sub 2}O{sub 5} can function as erased and written states.

[1]  E. Winter.  Exchange reactions of oxides. Part IX , 1968 .

[2]  S. K. Deb.  Optical and photoelectric properties and colour centres in thin films of tungsten oxide , 1973 .

[3]  E. Salje.  Lattice dynamics of WO3 , 1975 .

[4]  W. C. Dautremont-Smith.  Transition metal oxide electrochromic materials and displays: a review: Part 1: oxides with cathodic coloration , 1982 .

[5]  Horia Metiu,et al.  Enhancement of molecular fluorescence and photochemistry by small metal particles , 1985 .

[6]  G. Exarhos.  Raman determination of molecular structure and physical properties of dielectric coatings , 1986 .

[7]  B. Desbat,et al.  Infrared and Raman spectroscopies of rf sputtered tungsten oxide films , 1988 .

[8]  Klaus Bange,et al.  Electrochromic Materials for optical switching devices , 1990 .

[9]  J. Chaiken,et al.  Use of Laser‐Directed Chemical Vapor Deposition to Fabricate Durable, Optically Transparent, Platinum Thin Film Electrodes , 1990 .

[10]  J. Meunier,et al.  Microscope at the Brewster angle: Direct observation of first‐order phase transitions in monolayers , 1991 .

[11]  M. J. Casey,et al.  Laser chemistry of organometallics as a general synthetic route to metal clusters , 1992 .

[12]  Joseph Chaiken,et al.  Nonlinear interface optical switches based on photorefractive thin films , 1992, Photonics West - Lasers and Applications in Science and Engineering.

[13]  Stephan Herminghaus,et al.  On the fundamental role of oxygen for the photochromic effect of WO3 , 1993 .

[14]  M. J. Casey,et al.  Application of fractals and kinetic equations to cluster formation , 1993 .

[15]  J. Chaiken.  Laser chemistry of organometallics , 1993 .

[16]  Hong‐Ming Lin,et al.  Catalytic properties of nanocrystalline WO_3−x, Pt/WO_3−x, and Pd/WO_3−x particles , 1995 .