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Chipscale plasmonic modulators and switches based on metal-insulator-metal waveguides with Ge

Zhang, Z; Yang, J; Bai, W; Han, Y; He, X; Zhang, J; Huang, J; ... Xie, W; + view all (2019) Chipscale plasmonic modulators and switches based on metal-insulator-metal waveguides with Ge. Journal of Nanophotonics , 13 (4) , Article 046009. 10.1117/1.JNP.13.046009. Green open access

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Abstract

We introduce phase-change material Ge2Sb2Te5 (GST) into metal–insulator–metal (MIM) waveguide systems to realize chipscale plasmonic modulators and switches in the telecommunication band. Benefitting from the high contrast of optical properties between amorphous and crystalline GST, the three proposed structures can act as reconfigurable and nonvolatile modulators and switches with excellent modulation depth 14 dB and fast response time in subnanosecond while possessing small footprints, simple frameworks, and easy fabrication. We provide solutions to design active devices in MIM waveguide systems and can find potential applications in more compact all-optical circuits for information processing and storage.

Type: Article
Title: Chipscale plasmonic modulators and switches based on metal-insulator-metal waveguides with Ge
Open access status: An open access version is available from UCL Discovery
DOI: 10.1117/1.JNP.13.046009
Publisher version: https://doi.org/10.1117/1.JNP.13.046009
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: metal–insulator–metal; phase-change material; plasmonic modulator; plasmoninduced transparency
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Engineering Science Faculty Office
URI: https://discovery.ucl.ac.uk/id/eprint/10094074
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