Monolithically integrated bacteriorhodopsin-GaAs/GaAlAs phototransceiver

Jonghyun Shin, Pallab Bhattacharya, Jian Xu, György Váró

Research output: Contribution to journalArticle

8 Citations (Scopus)


A monolithically integrated baoteriorhodopsin-semiconduotor phototransceiver is demonstrated for the first time to the authors' knowledge. In this novel biophotonic optical interconnect, the input photoexcitation is detected by bacteriorhodopsin (bR) that has been selectively deposited onto the gate of a GaAs-based field-effect transistor. The photovoltage developed across the bR is converted by the transistor into an amplified photocurrent, which drives an integrated light-emitting diode with a Ga0.37Al 0.63As active region. Advantage is taken of the high-input impedance of the field-effect transistor, which matches the high internal resistance of bR. The input and output wavelengths are 594 and 655 nm, respectively. The transient response of the optoeleetronic circuit to modulated input light has also been studied.

Original languageEnglish
Pages (from-to)2264-2266
Number of pages3
JournalOptics Letters
Issue number19
Publication statusPublished - Oct 1 2004

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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