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Proceedings Paper

Applications of bacteriorhodopsin films for optical modulation and logic operations
Author(s): D. V. G. L. N. Rao
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Paper Abstract

Bacteriorhodopsin (bR) is the photodynamic protein complex found in the purple membrane of the Halobacterium halobium. The conformational changes of the bR molecule are associated with a photocycle. The initial B state of bR has an absorption peak at 570 nm while the long lived M state has an absorption peak at 412 nm. As the initial state has a broad absorption band it can be excited by means of red, yellow or green light. The M state can revert to the initial state via a thermal process or by a photochemical process by excitation with blue light. The lifetime of the M state can be dramatically altered by chemical and bioengineering methods. Several applications have already been proposed for bR as a photonic material.

Paper Details

Date Published: 1 September 1996
PDF: 1 pages
Proc. SPIE 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology, 2778AK (1 September 1996); doi: 10.1117/12.2316069
Show Author Affiliations
D. V. G. L. N. Rao, Univ. of Massachusetts Boston (United States)


Published in SPIE Proceedings Vol. 2778:
17th Congress of the International Commission for Optics: Optics for Science and New Technology
Joon-Sung Chang; Jai-Hyung Lee; ChangHee Nam, Editor(s)

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