Optical amplification of the resonance of a bimetal silicon cantilever

Takahito Ono, Shinya Yoshida, Yusuke Kawai, Masayoshi Esashi

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


This letter reports a photothermal transducer consisting of an ultrathin AuSi bimetal cantilever that functions as a resonator having a total thickness of 45 nm and a quality factor of ∼12 000. Due to its high-quality factor and small volume, this transducer is sensitive to the photothermal effect and its thermal response frequency is comparatively high. The authors demonstrated that the irradiation of a weak laser beam can enhance the transducer's response due to the nonlinear photothermal effect. Mechanical frequency-modulated detection of modulated light is demonstrated using this bimetal transducer.

Original languageEnglish
Article number243112
JournalApplied Physics Letters
Issue number24
Publication statusPublished - 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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