All-optical continuous-tunable image switch based on nonlinear photoinduced anisotropy in bacteriorhodopsin film

Guiying Chen, Xiaodong Shang, Guang Yang, Zhao Feng Hao, Xuxu Xu, Chunping Zhang, Q. W. Song

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Using nonlinear photoinduced anisotropy in bacteriorhodopsin (bR) film, we presented and demonstrated an image switch in which the output can be tuned continuously by the intensity of a pumping beam. A laser with wavelength 532 nm was used as the pumping beam, and a He-Ne laser at wavelength 632.8 nm was used as the probe beam. Without pumping light, a little of polarized probe beam can transmit the crossed polarizers and the output is very low. With the presence of pumping light, owing to photoinduced anisotropy in the bR film, a portion of the probe beam transmits the crossed polarizers, depending on the intensity of the pumping beam. For the low-intensity probe beam (0.44 mW/cm2), the output is dependent on a wide range of pumping beam (2-30 mW/cm2). On the contrary, for the high-intensity probe beam (0.80 mW/cm2), the output is dependent on a narrow range of pumping beam (2-7 mW/cm2).

Original languageEnglish (US)
Pages (from-to)721-725
Number of pages5
JournalOptik
Volume120
Issue number14
DOIs
StatePublished - Sep 1 2009

Keywords

  • Bacteriorhodopsin
  • Continuous-tunable image switch
  • Photoinduced anisotropy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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