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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 12, Iss. 5 — Mar. 8, 2004
  • pp: 895–906

All-optical switching characteristics in bacteriorhodopsin and its applications in integrated optics

Yuhua Huang, Shin-Tson Wu, and Youyuan Zhao  »View Author Affiliations

Optics Express, Vol. 12, Issue 5, pp. 895-906 (2004)

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We experimentally and theoretically investigated the optical switching characteristics of bacteriorhodopsin (bR) at λ=633 nm using the pump-probe method. A diode-pumped second harmonic YAG laser (λ=532 nm which is located around the maximum initial Br state absorption) was used as a pumping beam and a cw He-Ne laser (λ=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.

© 2004 Optical Society of America

OCIS Codes
(130.4310) Integrated optics : Nonlinear
(160.4890) Materials : Organic materials
(190.4390) Nonlinear optics : Nonlinear optics, integrated optics
(200.4660) Optics in computing : Optical logic
(230.1150) Optical devices : All-optical devices

ToC Category:
Research Papers

Original Manuscript: December 2, 2003
Revised Manuscript: February 26, 2004
Published: March 8, 2004

Yuhua Huang, Shin-Tson Wu, and Youyuan Zhao, "All-optical switching characteristics in bacteriorhodopsin and its applications in integrated optics," Opt. Express 12, 895-906 (2004)

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