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

doi:10.1587/elex.11.20140538

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

電気情報工学科

研究成果: Article › 査読

32 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
巻	11
号	15
DOI	https://doi.org/10.1587/elex.11.20140538
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

文献へのアクセス

10.1587/elex.11.20140538

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引用スタイル

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abstract = "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.",

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AU - Kuwahara, Masashi

AU - Wang, Xiaomin

AU - Tsuda, Hiroyuki

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