Organo-metallic thin films for erasable photochromatic laser discs

Zhongyi Hua; G. R. Chen; Z. H. Wang

doi:10.1117/12.47285

1 November 1991 Organo-metallic thin films for erasable photochromatic laser discs

Zhongyi Hua, G. R. Chen, Z. H. Wang

Proceedings Volume 1519, International Conference on Thin Film Physics and Applications; (1991) https://doi.org/10.1117/12.47285
Event: International Conference on Thin Film Physics and Applications, 1991, Shanghai, China

Abstract

A new category of erasable optical storage media, M_1-(Beta) (TCNQ) films, is described. The photochromatic effect of thin organometallic charge-transfer complex can give high contrast patterns directly produced on the film by pulsed photon beams generated from a He-Ne tube or a semiconductor laser. The patterns are erasable by the same light source under different irradiating conditions. Typical experimental results were as follows: For (lambda) equals 632.8 nm, write-in power equals 16 mW, pulse duration equals 300 ns; erasing power equals 8 mW, pulse duration equals 25 microsecond(s) ; coefficient of contrast K > 50%; number of write- erase cycles N > 1000. For (lambda) equals 830.0 nm, write-in power equals 12 mW, pulse duration equals 650 ns; erasing power equals 4 mW, pulse duration equals 15 microsecond(s) ; K > 25%; N > 120.

Citation Download Citation

Zhongyi Hua, G. R. Chen, and Z. H. Wang "Organo-metallic thin films for erasable photochromatic laser discs", Proc. SPIE 1519, International Conference on Thin Film Physics and Applications, (1 November 1991); https://doi.org/10.1117/12.47285

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