Ultra-small, self-holding, optical gate switch using Ge2Sb 2Te5 with a multi-mode Si waveguide

Daiki Tanaka, Yuya Shoji, Masashi Kuwahara, Xiaomin Wang, Kenji Kintaka, Hitoshi Kawashima, Tatsuya Toyosaki, Yuichiro Ikuma, Hiroyuki Tsuda

Research output: Contribution to journalArticlepeer-review

69 Citations (Scopus)


We report a multi-mode interference-based optical gate switch using a Ge2Sb2Te5 thin film with a diameter of only 1 μm. The switching operation was demonstrated by laser pulse irradiation. This switch had a very wide operating wavelength range of 100 nm at around 1575 nm, with an average extinction ratio of 12.6 dB. Repetitive switching over 2,000 irradiation cycles was also successfully demonstrated. In addition, selfholding characteristics were confirmed by observing the dynamic responses, and the rise and fall times were 130 ns and 400 ns, respectively.

Original languageEnglish
Pages (from-to)10283-10294
Number of pages12
JournalOptics Express
Issue number9
Publication statusPublished - 2012 Apr 23

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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