Strong optomechanical interaction in a bilayer photonic crystal

Young Geun Roh, Takasumi Tanabe, Akihiko Shinya, Hideaki Taniyama, Eiichi Kuramochi, Shinji Matsuo, Tomonari Sato, Masaya Notomi

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)


We fabricated bilayer photonic crystal (PhC) as large as 20×30 μm possessing 200-nm-thick slabs and a 200-nm-thick air gap. Input power dependence of reflectance spectra indicates air gap reduction by 3.6 nm. Combining it with finite element method calculation we estimate optomechanically generated force per unit stored energy as 0.4 μN/pJ, exhibiting strong optomechanical coupling. RF spectrum of reflected light reveals intensity modulation by thermal vibration of bilayer PhC, which also shows strong interaction of optical resonance mode and mechanical mode of bilayer PhC

Original languageEnglish
Article number121101
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number12
Publication statusPublished - 2010 Mar 9
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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