Integrated optical switching based on the protein bacteriorhodopsin

András Dér, Sándor Valkai, László Fábián, Pál Ormos, Jeremy J. Ramsden, Elmar K. Wolff

Research output: Contribution to journalArticle

26 Citations (Scopus)


According to our earlier pioneering study, a dry film containing native bacteriorhodopsin (bR) shows unique nonlinear optical properties (refractive index change, controllable by light of different colors, greater than 2 × 10-3) that are in many respects superior to those of the materials presently applied in integrated optics. Here, we report on the first integrated optical application based on a miniature Mach-Zehnder interferometer (see Figs. 1 and 2) demonstrating a real switching effect by bR (efficiency higher than 90%) due to the M-state. Our results also imply that the refractive index change of the K-state (9 × 10-4) is high enough for fast switching.

Original languageEnglish
Pages (from-to)393-396
Number of pages4
JournalPhotochemistry and photobiology
Issue number2
Publication statusPublished - Mar 1 2007


ASJC Scopus subject areas

  • Biochemistry
  • Physical and Theoretical Chemistry

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