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Proceedings Paper

Photon-biased modulator (photon transistor): biological photochrome bacteriorhodopsin film-based novel device element
Author(s): Li-Qun Gu; Chunping Zhang; Guangyin Zhang; Qi Wang Song; Richard B. Gross; Robert R. Birge
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Paper Abstract

Photon-biased modulator was the novel photon device model based on the complementarily modulated transmission of biological photochrome bacteriorhodopsin (BR) film. BR has two dominant photoactive states during the photocycle, B and M, which have well-separated absorption bands with maxima at 568 nm and 412 nm. The local transmission of a BR film depends on the ratio between the forward and the backward rate constants of photoreactions. The modulatable saturated absorption of chemically enhanced BR film under multi-beam illumination was studied. The theoretical analysis indicated that there exists the threshold intensity for the BR film simultaneously illuminated by two beams at 568 nm and 412 nm. Around threshold intensity, the transmissions of two beams are complementarily modulated. As one of the useful photon device application of photon transistor, new method of incoherent distortionless bright background removal in image processing was presented.

Paper Details

Date Published: 1 May 1998
PDF: 6 pages
Proc. SPIE 3253, Biomedical Sensing and Imaging Technologies, (1 May 1998); doi: 10.1117/12.308034
Show Author Affiliations
Li-Qun Gu, Nankai Univ. (Australia)
Chunping Zhang, Nankai Univ. (China)
Guangyin Zhang, Nankai Univ. (China)
Qi Wang Song, Syracuse Univ. (United States)
Richard B. Gross, Syracuse Univ. (United States)
Robert R. Birge, Syracuse Univ. (United States)


Published in SPIE Proceedings Vol. 3253:
Biomedical Sensing and Imaging Technologies
Robert A. Lieberman; Tuan Vo-Dinh, Editor(s)

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