Authors

Y. H. Huang; S. T. Wu;Y. Y. Zhao

Comments

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Abbreviated Journal Title

Opt. Express

Keywords

LOGIC GATES; LIGHT-MODULATION; FILMS; RHODOPSIN; PROTEIN; Optics

Abstract

We experimentally and theoretically investigated the optical switching characteristics of bacteriorhodopsin (bR) at lambda=633 nm using the pump-probe method. A diode-pumped second harmonic YAG laser (lambda=532 nm which is located around the maximum initial Br state absorption) was used as a pumping beam and a cw He-Ne laser (lambda=633 nm which is around the peaks of K and O states) was used as a probe. Due to the nonlinear intensity induced excited state absorption of the K, L, M, N, and O states in the bR photocycle, the switching characteristics are sensitive to the intensity of the probe and pump beams. Based on this property, we have demonstrated an all-optical device functioning as 11 kinds of variable binary all-optical logic gates.

Journal Title

Optics Express

Volume

12

Issue/Number

5

Publication Date

1-1-2004

Document Type

Article

Language

English

First Page

895

Last Page

906

WOS Identifier

WOS:000220081100023

ISSN

1094-4087

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