Optomechanical photoabsorption spectroscopy of exciton states in GaAs

Takayuki Watanabe, Hajime Okamoto, Koji Onomitsu, Hideki Gotoh, Tetsuomi Sogawa, Hiroshi Yamaguchi

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


We demonstrate a scheme for the photoabsorption spectroscopy of semiconductors via mechanical vibration characteristics. The thermal vibration of an AlGaAs/GaAs heterostructure-based cantilever sensitively reflects the photoabsorption properties of GaAs because of the optically induced piezoelectric effect. The Q factor and the peak amplitude of mechanical vibration are strongly enhanced near the exciton-related absorption peaks of GaAs at 10 K, showing good agreement with reported photoluminescence spectra.

Original languageEnglish
Article number082107
JournalApplied Physics Letters
Issue number8
Publication statusPublished - 2012 Aug 20


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