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...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/138701 |
| _version_ | 1826126813918658560 |
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| 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 |
| author2 | 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 |
| author_sort | Yan, Libin |
| collection | NTU |
| description | 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. |
| first_indexed | 2024-10-01T06:58:29Z |
| format | Journal Article |
| id | ntu-10356/138701 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:58:29Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-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. |
| spellingShingle | 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 |
| title | 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_short | 0.2 λ0 thick adaptive retroreflector made of spin-locked metasurface |
| title_sort | 0 2 λ0 thick adaptive retroreflector made of spin locked metasurface |
| topic | Engineering::Electrical and electronic engineering Adaptive Metasurfaces Retroreflection |
| url | https://hdl.handle.net/10356/138701 |
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