Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/143470
Title: Angular-adaptive spin-locked retroreflector based on reconfigurable magnetic metagrating
Authors: Li, Min
Jing, Liqiao
Lin, Xiao
Xu, Su
Shen, Lian
Zheng, Bin
Wang, Zuojia
Chen, Hongsheng
Keywords: Science::Physics
Issue Date: 2019
Source: Li, M., Jing, L., Lin, X., Xu, S., Shen, L., Zheng, B., ... Chen, H. (2019). Angular-adaptive spin-locked retroreflector based on reconfigurable magnetic metagrating. Advanced Optical Materials, 7(13), 1900151-. doi:10.1002/adom.201900151
Journal: Advanced Optical Materials
Abstract: Retroreflectors made of gradient metasurfaces have recently attracted intense interests due to their ability in reflecting incident light back to its source. So far, the current retroreflectors can only flip the transverse momenta of incident photons in specific incidence angles and thus have limitations in wide‐angle applications. Here, a switchable metagrating based retroreflector is proposed for high‐efficient spin‐locked retroreflection and suppression of undesired diffractions. Upon reflection, the handedness of the waves is kept the same as the incidence. Furthermore, by mechanically altering the folding state of the reconfigurable retroreflector, adaptive tangential momenta could be imparted to the incidence photons, providing a high‐performance retroreflection over a continuous range of incidence angles from 27.3° to 52.5°. As a proof of concept, a magnetic metagrating based retroreflector is fabricated at microwave frequencies and experimental measurements show consistent behaviors at various incidence angles. The proposed retroreflector is compact (overall thickness of 0.204 of the wavelength) and inherently insensitive to the illumination angle. As the design concept introduced in the paper could be extended to terahertz and optical frequencies, the design may serve as a promising platform toward reconfigurable spin‐based retroreflection devices for not only interface electromagnetics but also ultraflat photonics.
URI: https://hdl.handle.net/10356/143470
ISSN: 2195-1071
DOI: 10.1002/adom.201900151
Rights: This is the accepted version of the following article: Li, M., Jing, L., Lin, X., Xu, S., Shen, L., Zheng, B., ... Chen, H. (2019). Angular-adaptive spin-locked retroreflector based on reconfigurable magnetic metagrating. Advanced Optical Materials, 7(13), 1900151-. doi:10.1002/adom.201900151, which has been published in final form at https://doi.org/10.1002/adom.201900151. This article may be used for non-commercial purposes in accordance with the Wiley Self-Archiving Policy [https://authorservices.wiley.com/authorresources/Journal-Authors/licensing/self-archiving.html].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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