A tunable multiband chirped metasurface

Mao, Libang; Cao, Tun

doi:10.1016/j.jsamd.2016.07.004

Cited by 1 publication

(1 citation statement)

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“…In analogy to amplitude metasurface modulators or frequency selective filters working in the visible and NIR spectral regions, devices for amplitude control in the MWIR and LWIR are based on a relevant portion of the spectrum being selectively absorbed, reflected or transmitted., In the MWIR and LWIR regimes selective control of light amplitude is highly desirable for applications such as multispectral and thermal imaging, biosensing [43,117,118] or thermal emission [119]. A recent example of using PCM-based metasurfaces for multispectral imaging in the MWIR and LWIR was reported by Trimby et al, where tunable frequency selective metasurfaces based on the extraordinary transmission (EOT) effect combined with PCMs were developed [43] (based on previous work from Rudé et al in the NIR [120]).…”

Section: Phase-change Meta-devices For Amplitude Control In the Mwir ...mentioning

confidence: 99%

Tunable optical metasurfaces enabled by chalcogenide phase-change materials: from the visible to the THz

Galarreta

Carrillo

et al. 2020

J. Opt.

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Metasurfaces and nanoantennas are redefining what can be achieved in terms of optical beam manipulation, as they provide a versatile design platform towards moulding the flow of light at will. Yet, once a conventional metasurface is designed and realised, its effect on optical beams is repeatable and stationary, thus its performance is 'locked-in' at the fabrication stage. A much wider range of applications, such as dynamic beam steering, reconfigurable and dynamic lensing, optical modulation and reconfigurable spectral filtering, could be achieved if real-time tuning of metasurface optical properties were possible. Chalcogenide phase-change materials, because of their rather unique ability to undergo abrupt, repeatable and non-volatile changes in optical properties when switched between their amorphous and crystalline phases, have in recent years been combined with metasurface architectures to provide a promising platform for the achievement of dynamic tunability. In this paper, the concept of dynamically tunable phase-change metasurfaces is introduced, and recent results spanning the electromagnetic spectrum from the visible right through to the THz regime are presented and discussed. The progress, potential applications, and possible future perspectives of phase-change metasurface technology are highlighted, and requirements for the successful implementation of real-world applications are discussed.

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