Tunable Mid-Infrared Phase-Change Metasurface

Weiling Dong; Yimei Qiu; Xilin Zhou; Agnieszka Banas; Krzysztof Banas; Mark B.H. Breese; Tun Cao; Robert E. Simpson

doi:10.1002/adom.201701346

Tunable Mid-Infrared Phase-Change Metasurface

Weiling Dong, Yimei Qiu, Xilin Zhou, Agnieszka Banas, Krzysztof Banas, Mark B.H. Breese, Tun Cao^*, Robert E. Simpson

^*Corresponding author for this work

Electronic, Electrical and Systems Engineering

Research output: Contribution to journal › Article › peer-review

86 Citations (Scopus)

Abstract

The intense light–matter interaction of plasmonic metasurfaces provides an appealing platform for optical sensing. To date, most metasurface sensors are not spectrally tuned. Moreover, they operate in a total reflection mode, which complicates the optical setup. Transmissive tunable filters are therefore desirable. A mid-infrared (M-IR) tunable metasurface is described that operates in transmission mode. The resonant frequency of the filter is tuned by nonvolatile phase transitions to the dielectric properties of the chalcogenide material Ge₂Sb₂Te₅. A broad transmittance spectral shift of 500 nm across the M-IR region is experimentally demonstrated. This shift is in good agreement with finite-difference time-domain simulations of the same structure. The design paves the way for on-chip M-IR multispectral interferometry and provides a promising approach for compact real-time M-IR measurements.

Original language	English
Article number	1701346
Journal	Advanced Optical Materials
Volume	6
Issue number	14
DOIs	https://doi.org/10.1002/adom.201701346
Publication status	Published - 18 Jul 2018

Bibliographical note

Funding Information:
W.D. and T.C. contributed equally to this work. This work was supported by Singapore China Joint Research Program (JRP) through Grant No. 2015DFG12630 from the International Science & Technology Cooperation Program of China and Grant No. 1520203155 from the Singapore Science & Engineering Research Council (SERC). T.C. acknowledges support from Program for Liaoning Excellent Talents in University (Grant No. LJQ2015021). W.D. is grateful for her SUTD President's Graduate Fellowship. The authors are also grateful for time on the ISMI beam line at the SSLS.

Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Keywords

metamaterials
mid-infrared
phase change materials
surface plasmon resonance
tunable

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics

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10.1002/adom.201701346

Cite this

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abstract = "The intense light–matter interaction of plasmonic metasurfaces provides an appealing platform for optical sensing. To date, most metasurface sensors are not spectrally tuned. Moreover, they operate in a total reflection mode, which complicates the optical setup. Transmissive tunable filters are therefore desirable. A mid-infrared (M-IR) tunable metasurface is described that operates in transmission mode. The resonant frequency of the filter is tuned by nonvolatile phase transitions to the dielectric properties of the chalcogenide material Ge2Sb2Te5. A broad transmittance spectral shift of 500 nm across the M-IR region is experimentally demonstrated. This shift is in good agreement with finite-difference time-domain simulations of the same structure. The design paves the way for on-chip M-IR multispectral interferometry and provides a promising approach for compact real-time M-IR measurements.",

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Tunable Mid-Infrared Phase-Change Metasurface

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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