Ultra-compact, self-holding asymmetric Mach-Zehnder interferometer switch using Ge2Sb2Te5 phase-change material

Takumi Moriyama, Daiki Tanaka, Paridhi Jain, Hitoshi Kawashima, Masashi Kuwahara, Xiaomin Wang, Hiroyuki Tsuda

研究成果: Article査読

28 被引用数 (Scopus)

抄録

An asymmetric Mach-Zehnder interferometer optical switch using phase-change material (PCM) is reported. In this switch, two Ge2Sb2Te5 thin films, each 1 μm in diameter, are deposited on a Si waveguide, and are used as phase shifters. The PCM can be reversibly switched between the amorphous and crystalline states. The difference in refractive index between the two states is very large, typically more than 2. Therefore, an optical switch using the PCM can be very small. The switching operation is successfully demonstrated by laser pulse irradiation. The maximum extinction ratio is 26.7 dB, and 2.2-nm peak wavelength shift is verified.

本文言語English
論文番号20140538
ジャーナルIEICE Electronics Express
11
15
DOI
出版ステータスPublished - 2014 7月 11

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学

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