Planar peristrophic multiplexing metasurfaces
평면 잠류 복접원 표면
Superficie del elemento de reconexión de flujo sumergido plano
Méta - surface plane submersible de jonction
плоский подводный ток
Jia Chen 陈佳 ¹ ², Dapeng Wang 王大鹏 ¹ ², Guangyuan Si 司光远 ³, Siew Lang Teo ⁴, Qian Wang ⁴, Jiao Lin ⁵
¹ School of Electronic Science and Engineering (National Model Microelectronics College), Xiamen University, Xiamen 361005, China
中国 厦门 厦门大学电子科学与技术学院(国家示范性微电子学院)
² Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen 361005, China
中国 厦门 中国福建能源材料科学与技术创新实验室
³ Melbourne Centre for Nanofabrication, Victorian Node of the Australian National Fabrication Facility, Clayton 3168, VIC, Australia
⁴ Institute of Materials Research and Engineering, Agency for Science, Technology, and Research (A*STAR) 2 Fusionopolis Way, Innovis 08-03, Singapore 138632, Singapore
⁵ School of Engineering, RMIT University, Melbourne, Victoria 3001, Australia
Opto-Electronic Advances, 31 August 2023

As a promising counterpart of two-dimensional metamaterials, metasurfaces enable to arbitrarily control the wavefront of light at subwavelength scale and hold promise for planar holography and applicable multiplexing devices. Nevertheless, the degrees of freedom (DoF) to orthogonally multiplex data have been almost exhausted.

Compared with state-of-the-art methods that extensively employ the orthogonal basis such as wavelength, polarization or orbital angular momentum, we propose an unprecedented method of peristrophic multiplexing by combining the spatial frequency orthogonality with the subwavelength detour phase principle. The orthogonal relationship between the spatial frequency of incident light and the locally shifted building blocks of metasurfaces can be regarded as an additional DoF. We experimentally demonstrate the viability of the multiplexed holograms.

Moreover, this newly-explored orthogonality is compatible with conventional DoFs. Our findings will contribute to the development of multiplexing metasurfaces and provide a novel solution to nanophotonics, such as large-capacity chip-scale devices and highly integrated communication.
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