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  • Title: All-optical time-delay switch based on grating buildup time of two-wave mixing in a bacteriorhodopsin film.
    Author: Chen G, Lu W, Xu X, Tian J, Zhang C.
    Journal: Appl Opt; 2009 Oct 01; 48(28):5205-11. PubMed ID: 19798358.
    Abstract:
    We demonstrate time-delay switches using the first-order dynamic diffraction light of two-beam coupled light with wavelengths of 632.8, 650, 532, and 488 nm in a bacteriorhodopsin film. The optimal wavelengths are selected and the relationship between incident intensity and delay time is discussed. A switch delay time ranging from 3.52 to 12.5 s is presented by the 632.8 nm wavelength, while a delay time ranging from 1.24 to 10.6 s is demonstrated by the 488 nm wavelength. On the other hand, the wavelengths of 532 and 650 nm are not suitable for time-delay switches due to the large variation of first-order diffraction intensity for lower incident intensities.
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