Metasurface for oscillatory spin splitting along the optical path

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Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2022-09-01
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Language
en
Pages
B7-B13
Series
Photonics Research, Volume 10, issue 9
Abstract
Spin splitting of light originates from the interplay between the polarization and spatial degrees of freedom as a fundamental constituent of the emerging spin photonics, providing a prominent pathway for manipulating photon spin and developing exceptional photonic devices. However, previously relevant devices were mainly designed for routing monotonous spin splitting of light. Here, we realize an oscillatory spin splitting of light via metasurface with two channel Pancharatnam–Berry phases. For the incidence of a linearly polarized light, the concomitant phases arising from opposite spin states transition within pathways of the metasurface induce lateral spin splitting of light with alternately changed transport direction during beam guiding. We demonstrate the invariance of this phenomenon with an analogous gauge transformation. This work provides a new insight on steering the photon spin and is expected to explore a novel guiding mechanism of relativistic spinning particles, as well as applications of optical trapping and chirality sorting.
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Funding Information: Funding. National Natural Science Foundation of China (12174309, 11634010, 91850118, 11774289); National Key Research and Development Program of China (2017YFA0303800); Natural Science Basic Research Program of Shaanxi (2021JQ-895, 2020JM-104); Fundamental Research Funds for the Central Universities (3102019JC008). Publisher Copyright: © 2022 Chinese Laser Press.
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Citation
Li , Y , Fan , X , Guo , X , Zhang , Y , Liu , S , Wei , B , Wen , D , Li , P & Zhao , J 2022 , ' Metasurface for oscillatory spin splitting along the optical path ' , Photonics Research , vol. 10 , no. 9 , pp. B7-B13 . https://doi.org/10.1364/PRJ.463041