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Manipulating the Generation of Photonic Moiré Lattices Using Plasmonic Metasurfaces.

Authors :
Mu, Zhanliang
Zhang, Yuqin
An, Jianshan
Zhang, Xuehui
Zhou, Haoran
Song, Hongsheng
He, Changwei
Liu, Guiyuan
Cheng, Chuanfu
Source :
Nanomaterials (2079-4991). Jan2024, Vol. 14 Issue 2, p230. 13p.
Publication Year :
2024

Abstract

The generation of moiré lattices by superimposing two identical sublattices at a specific twist angle has garnered significant attention owing to its potential applications, ranging from two-dimensional materials to manipulating light propagation. While macroscale moiré lattices have been widely studied, further developments in manipulating moiré lattices at the subwavelength scale would be crucial for miniaturizing and integrating platforms. Here, we propose a plasmonic metasurface design consisting of rotated nanoslits arranged within N + N′ round apertures for generating focused moiré lattices. By introducing a spin-dependent geometric phase through the rotated nanoslits, an overall lens and spiral phase can be achieved, allowing each individual set of round apertures to generate a periodic lattice in the focal plane. Superimposing two sets of N and N′ apertures at specific twist angles and varying phase differences allows for the superposition of two sublattices with different periods, leading to the formation of diverse moiré patterns. Our simulations and theoretical results demonstrate the feasibility of our proposed metasurface design. Due to their compactness and tunability, the utilization of metasurfaces in creating nanoscale photonic moiré lattices is anticipated to find extensive applications in integrated and on-chip optical systems. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
20794991
Volume :
14
Issue :
2
Database :
Academic Search Index
Journal :
Nanomaterials (2079-4991)
Publication Type :
Academic Journal
Accession number :
175080673
Full Text :
https://doi.org/10.3390/nano14020230