All-optical logic gates using bacteriorhodopsin films

Tianhao Zhang, Chunping Zhang, Guanghua Fu, Yudong Li, Liqun Gu, Guangyin Zhang, Q. Wang Song, Bruce Parsons, Robert R. Birge

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


We demonstrate all-optical logic gates using bacteriorhodopsin (bR) film. By studying the transmission of bR film, we advance an all-light-modulated transmission mechanism of bR film: complementary suppression-modulated transmission (CSMT). When a yellow beam (568 nm) and a blue beam (412 nm) illuminate bR film, the two transmitted beams suppress mutually. Based on this mechanism, we design an all-optical operating device in which we implement all 16 kinds of double-variable binary logic operations. The intensity of an incident yellow or blue beam acts as the input to the logic gate and the transmission bears the output of the gate. We can turn this all-optical device into different states using different wavelengths and different intensity illuminations.

Original languageEnglish (US)
Pages (from-to)527-534
Number of pages8
JournalOptical Engineering
Issue number2
StatePublished - 2000

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • General Engineering


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