Photonic spin Hall effect driven broadband multi-focus dielectric metalens

The multi-focus metalens can couple the light into multiple channels in optical interconnections, which is beneficial to the development of planar, miniaturized, and integrated components. We propose broadband photonic spin Hall effect (PSHE) driven multi-focus metalenses, in which each nanobrick pl...

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Bibliographic Details
Published in:Applied optics (2004) 2023-10, Vol.62 (30), p.8159
Main Authors: Wang, Wei, Zhao, Ruikang, Kang, Qianlong, Wang, Runhao, Liu, Xiangmin, Liu, Tianyuan, Fan, Shi-Wang, Guo, Zhongyi
Format: Article
Language:English
Subjects:
Broadband
Circular polarization
Data processing
Hall effect
Optical interconnects
Photonics
Polarization (spin alignment)
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Summary:The multi-focus metalens can couple the light into multiple channels in optical interconnections, which is beneficial to the development of planar, miniaturized, and integrated components. We propose broadband photonic spin Hall effect (PSHE) driven multi-focus metalenses, in which each nanobrick plays a positive role for all focal points. Three PSHE driven metalenses with four, six, and eight focal points have been designed and investigated, respectively. Under the incidences of left-/right-handed circularly polarized (LCP/RCP) light, these metalenses can generate regularly distributed two, three, and four RCP/LCP focal points, respectively. The uniformity of the focusing intensity has been investigated in detail by designing an additional four six-focus metalenses with different focus distributions. The uniqueness of these metalenses makes this design philosophy very attractive for applications in spin photonics, compact polarization detection, multi-imaging systems, and information processing systems.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.502888