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Applied Optics

Applied Optics


  • Vol. 28, Iss. 7 — Apr. 1, 1989
  • pp: 1417–1421

Organometallic materials for erasable optical storage

Robert C. Hoffman and Richard S. Potember  »View Author Affiliations

Applied Optics, Vol. 28, Issue 7, pp. 1417-1421 (1989)

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An erasable optical storage medium utilizing an AgTCNQ organometallic charge transfer complex has been demonstrated. AgTCNQ films were produced by a vacuum deposition technique in which the donor (Ag) and acceptor (TCNQ°) were reacted in the solid state. High contrast patterns were produced on the material by cw and pulsed Nd:YAG and GaAlAs lasers, and erasure was accomplished by cw Nd:YAG and GaAlAs lasers or bulk heating. Up to fifteen write–erase cycles were observed, with reflectivity increases up to 30% observed in optimum conditions.

© 1989 Optical Society of America

Original Manuscript: July 7, 1988
Published: April 1, 1989

Robert C. Hoffman and Richard S. Potember, "Organometallic materials for erasable optical storage," Appl. Opt. 28, 1417-1421 (1989)

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  1. R. S. Potember et al., “Electrical Switching and Memory Phenomena in Cu-TCNQ Thin Films,” Appl. Phys. Lett. 34, 405 (1979). [CrossRef]
  2. R. S. Potember et al., “A Reversible Field Induced Phase Transition in Semiconducting Films of Silver and Copper TNAP Radical-Ion Salts,” J. Am. Chem. Soc. 103, 3659 (1980). [CrossRef]
  3. R. S. Potember et al., “The Vibrational and X-Ray Photoelectronic Spectra of Semiconducting Copper-TCNQ Films,” Chem. Scr. 17, 219 (1981).
  4. R. S. Potember et al., “Reversible Electric Field Induced Bistability in Carbon Based Radical-Ion Semiconducting Complexes: A Model System for Molecular Information Processing and Storage,” in Molecular Electronics, F. L. Carter, Ed. (Marcel Dekker, New York, 1987).
  5. R. S. Potember et al., “Optical Switching in Semiconductor Organic Thin Films,” Appl. Phys. Lett. 41, 548 (1982). [CrossRef]
  6. R. C. Benson et al., “Spectral Dependence of Reversible Optically Induced Transitions in Organometallic Compounds,” Appl. Phys. Lett. 42, 855 (1983). [CrossRef]
  7. C. R. Morgan, “Dual UV/Thermally Curable Acrylate Compositions with Pinacol,” U.S. Pat.4,288,527 (1981). Although the composition of the UV curing topcoat can vary considerably, typical components include an acrylic prepolymer, a cross-linking agent such as pinacol, and one or more thermal or ultraviolet initiators.
  8. J. B. Torrance et al., “Optical Properties of Charge Transfer Salts of Tetracyanoquinodimethane (TCNQ),” Solid State Commun. 17, 1369 (1975). [CrossRef]
  9. H. Hoshino et al., “Reversible Write–Erase Properties of CuTCNQ Optical Recording Media,” J. Appl. Phys. 25, L341 (1986). [CrossRef]
  10. The aluminum underlayer thickness was 100 nm, and the AgTCNQ film was ~200 nm thick and was covered with a TCNQ° doped acrylic topcoat. The write laser used was a pulsed Nd:YAG laser operating at 532 nm. Pulse energies were ~5 μJ. The erase laser was a cw Nd:YAG laser used in conjunction with an electromechanical shutter.

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