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

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概要

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• 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.

• The Institute of Electronics, Information and Communication Engineersの論文

著者

• Tsuda Hiroyuki

  Graduate School Of Science And Technology Keio University

• Wang Xiaomin

  National Institute of Advanced Industrial Science and Technology, (AIST), Center for Applied Near-Field Optics Research (CAN-FOR), Tsukuba, Ibaraki 305-8562, Japan

• Kawashima Hitoshi

  National Institute of Advanced Industrial Science and Technology (AIST)

• Jain Paridhi

  Graduate School of Science and Technology, Keio University

• Moriyama Takumi

  Graduate School of Science and Technology, Keio University

• Tanaka Daiki

  Graduate School of Science and Technology, Keio University

• Kuwahara Masashi

  National Institute of Advanced Industrial Science and Technology

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

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