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Proceedings Paper

Ultra-thin, reconfigurable meta-optics using optical phase change materials (Conference Presentation)
Author(s): Mikhail Shalaginov; Yifei Zhang; Sensong An; Jeffrey Chou; Qingyang Du; Anupama Yadav; Myungkoo Kang; Cesar Blanco; Peter Su; Megan Driggers; Andrew Kirk; Erwan Baleine; Anuradha Agarwal; Clara Rivero-Baleine; Vladimir Liberman; Kathleen Richardson; Hualiang Zhang; Juejun Hu; Tian Gu
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Paper Abstract

The dramatic optical property change of optical phase change materials (O-PCMs) between their amorphous and crystalline states potentially allows the realization of reconfigurable photonic devices with enhanced optical functionalities and low power consumption, such as reconfigurable optical components, optical switches and routers, and photonic memories. Conventional O-PCMs exhibit considerable optical losses, limiting their optical performance as well as application space. In this talk, we present the development of a new group of O-PCMs and their implementations in novel meta-optic devices. Ge-Sb-Se-Te (GSST), obtained by partially substituting Te with Se in traditional GST alloys, feature unprecedented broadband optical transparency covering the telecommunication bands to the LWIR. A drastic refractive index change between the amorphous and crystalline states of GSST is realized and the transition is non-volatile and reversible. Optical metasurfaces consist of optically-thin, subwavelength meta-atom arrays which allow arbitrary manipulation of the wavefront of light. Capitalizing on the dramatically-enhanced optical performance of GSST, transparent and ultra-thin reconfigurable meta-optics in mid-infrared are demonstrated. In one example, GSST-based all-dielectric nano-antennae are used as the fundamental building blocks for meta-optic components. Tunable and switchable metasurface devices are developed, taking advantage of the materials phase changing properties.

Paper Details

Date Published: 17 September 2018
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Proc. SPIE 10719, Metamaterials, Metadevices, and Metasystems 2018, 1071911 (17 September 2018); doi: 10.1117/12.2323580
Show Author Affiliations
Mikhail Shalaginov, Massachusetts Institute of Technology (United States)
Yifei Zhang, Massachusetts Institute of Technology (United States)
Sensong An, Univ. of Massachusetts Lowell (United States)
Jeffrey Chou, MIT Lincoln Lab. (United States)
Qingyang Du, Massachusetts Institute of Technology (United States)
Anupama Yadav, Univ. of Central Florida (United States)
Myungkoo Kang, Univ. of Central Florida (United States)
Cesar Blanco, Univ. of Central Florida (United States)
Peter Su, Massachusetts Institute of Technology (United States)
Megan Driggers, Lockheed Martin Corp. (United States)
Andrew Kirk, Lockheed Martin Corp. (United States)
Erwan Baleine, Lockheed Martin Corp. (United States)
Anuradha Agarwal, Massachusetts Institute of Technology (United States)
Clara Rivero-Baleine, Lockheed Martin Corp. (United States)
Vladimir Liberman, MIT Lincoln Lab. (United States)
Kathleen Richardson, Univ. of Central Florida (United States)
Hualiang Zhang, Univ. of Massachusetts Lowell (United States)
Juejun Hu, Massachusetts Institute of Technology (United States)
Tian Gu, Massachusetts Institute of Technology (United States)


Published in SPIE Proceedings Vol. 10719:
Metamaterials, Metadevices, and Metasystems 2018
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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