All-optical on-chip bit memory based on ultra high Q InGaAsP photonic crystal

Akihiko Shinya, Shinji Matsuo, Yosia, Takasumi Tanabe, Eiichi Kuramochi, Tomonari Sato, Takaaki Kakitsuka, Masaya Notomi

Research output: Contribution to journalArticlepeer-review

85 Citations (Scopus)


We demonstrate all-optical bit memory operation with photonic crystal (PhC) nanocavities based on an InGaAsP substrate with a band gap at a wavelength of about 1.3 μm. The optical bistability is based on a refractive index modulation caused by carrier-plasma dispersion. The operating energy required for switching is only 30 fJ, and the minimum optical bias power for bistability is 40 μW, which is about one hundred times less than that required for laser based bistable memories.

Original languageEnglish
Pages (from-to)19382-19387
Number of pages6
JournalOptics Express
Issue number23
Publication statusPublished - 2008 Nov 10
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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