0.2 λ0 thick adaptive retroreflector made of spin-locked metasurface
The metasurface concept is employed to planarize retroflectors by stacking two metasurfaces with separation that is two orders larger than the wavelength. Here, a retroreflective metasurface using subwavelength-thick reconfigurable C-shaped resonators (RCRs) is reported, which reduces the overall th...
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sg-ntu-dr.10356-1387012020-05-12T02:52:15Z 0.2 λ0 thick adaptive retroreflector made of spin-locked metasurface Yan, Libin Zhu, Weiming Muhammad Faeyz Karim Cai, Hong Gu, Alex Yuandong Shen, Zhongxiang Chong, Peter Han Joo Kwong, Dim-Lee Qiu, Cheng-Wei Liu, Ai Qun School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Adaptive Metasurfaces Retroreflection The metasurface concept is employed to planarize retroflectors by stacking two metasurfaces with separation that is two orders larger than the wavelength. Here, a retroreflective metasurface using subwavelength-thick reconfigurable C-shaped resonators (RCRs) is reported, which reduces the overall thickness from the previous record of 590 λ0 down to only 0.2 λ0 . The geometry of RCRs could be in situ controlled to realize equal amplitude and phase modulation onto transverse magnetic (TM)-polarized and transverse electric (TE)-polarized incidences. With the phase gradient being engineered, an in-plane momentum could be imparted to the incident wave, guaranteeing the spin state of the retro-reflected wave identical to that of the incident light. Such spin-locked metasurface is natively adaptive toward different incident angles to realize retroreflection by mechanically altering the geometry of RCRs. As a proof of concept, an ultrathin retroreflective metasurface is validated at 15 GHz, under various illumination angles at 10°, 12°, 15°, and 20°. Such adaptive spin-locked metasurface could find promising applications in spin-based optical devices, communication systems, remote sensing, RCS enhancement, and so on. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) 2020-05-12T02:52:15Z 2020-05-12T02:52:15Z 2018 Journal Article Yan, L., Zhu, W., Muhammad Faeyz Karim, Cai, H., Gu, A. Y., Shen, Z., . . . Liu, A. Q. (2018). 0.2 λ0 thick adaptive retroreflector made of spin-locked metasurface. Advanced materials, 30(39), 1802721-. doi:10.1002/adma.201802721 0935-9648 https://hdl.handle.net/10356/138701 10.1002/adma.201802721 30129232 2-s2.0-85052380467 39 30 en Advanced materials © 2018 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved. This paper was published in Advanced materials and is made available with permission of WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. |
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Engineering::Electrical and electronic engineering Adaptive Metasurfaces Retroreflection |
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Engineering::Electrical and electronic engineering Adaptive Metasurfaces Retroreflection Yan, Libin Zhu, Weiming Muhammad Faeyz Karim Cai, Hong Gu, Alex Yuandong Shen, Zhongxiang Chong, Peter Han Joo Kwong, Dim-Lee Qiu, Cheng-Wei Liu, Ai Qun 0.2 λ0 thick adaptive retroreflector made of spin-locked metasurface |
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The metasurface concept is employed to planarize retroflectors by stacking two metasurfaces with separation that is two orders larger than the wavelength. Here, a retroreflective metasurface using subwavelength-thick reconfigurable C-shaped resonators (RCRs) is reported, which reduces the overall thickness from the previous record of 590 λ0 down to only 0.2 λ0 . The geometry of RCRs could be in situ controlled to realize equal amplitude and phase modulation onto transverse magnetic (TM)-polarized and transverse electric (TE)-polarized incidences. With the phase gradient being engineered, an in-plane momentum could be imparted to the incident wave, guaranteeing the spin state of the retro-reflected wave identical to that of the incident light. Such spin-locked metasurface is natively adaptive toward different incident angles to realize retroreflection by mechanically altering the geometry of RCRs. As a proof of concept, an ultrathin retroreflective metasurface is validated at 15 GHz, under various illumination angles at 10°, 12°, 15°, and 20°. Such adaptive spin-locked metasurface could find promising applications in spin-based optical devices, communication systems, remote sensing, RCS enhancement, and so on. |
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School of Electrical and Electronic Engineering |
author_facet |
School of Electrical and Electronic Engineering Yan, Libin Zhu, Weiming Muhammad Faeyz Karim Cai, Hong Gu, Alex Yuandong Shen, Zhongxiang Chong, Peter Han Joo Kwong, Dim-Lee Qiu, Cheng-Wei Liu, Ai Qun |
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Article |
author |
Yan, Libin Zhu, Weiming Muhammad Faeyz Karim Cai, Hong Gu, Alex Yuandong Shen, Zhongxiang Chong, Peter Han Joo Kwong, Dim-Lee Qiu, Cheng-Wei Liu, Ai Qun |
author_sort |
Yan, Libin |
title |
0.2 λ0 thick adaptive retroreflector made of spin-locked metasurface |
title_short |
0.2 λ0 thick adaptive retroreflector made of spin-locked metasurface |
title_full |
0.2 λ0 thick adaptive retroreflector made of spin-locked metasurface |
title_fullStr |
0.2 λ0 thick adaptive retroreflector made of spin-locked metasurface |
title_full_unstemmed |
0.2 λ0 thick adaptive retroreflector made of spin-locked metasurface |
title_sort |
0.2 λ0 thick adaptive retroreflector made of spin-locked metasurface |
publishDate |
2020 |
url |
https://hdl.handle.net/10356/138701 |
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1681058719946768384 |