Giant broadband spin-selective asymmetric transmission and wavefront shaping in transition-metal-dichalcogenide-based chiral metasurfaces

Xiaolin Chen; Weiqing Gao; Dangyuan Lei

doi:10.1063/5.0185546

Giant broadband spin-selective asymmetric transmission and wavefront shaping in transition-metal-dichalcogenide-based chiral metasurfaces

Xiaolin Chen, Weiqing Gao^*, Dangyuan Lei^*

^*Corresponding author for this work

Department of Materials Science and Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

3 Citations (Scopus)

16 Downloads (CityUHK Scholars)

Abstract

Multidimensional spin-selective manipulation of optical waves is crucial for various intriguing applications in modern nanophotonics, such as quantum-information processing and chiral sensing and imaging. In this work, we observed giant broadband asymmetric transmission of circularly polarized waves and spin-preserving reflection, together with near-unity transmission circular dichroism, in a planar chiral metasurface composed of high-index transition-metal-dichalcogenide nanoantennas with large material anisotropy. The perpendicular and parallel electric and magnetic dipole moments excited in the nanoantennas under circularly polarized waves are explored to account for the asymmetric transmission and optical chirality. Combined with the Pancharatnam-Berry phase, we achieved the wavefront manipulation for transmitted circularly polarized waves with an efficiency approaching 91.5% and spin-selective focusing of an incident light via a metasurface metalens. Our work will pave the way for studying the multidimensional manipulation of optical spins through engineering transition-metal-dichalcogenide-based metasurfaces. © 2024 Author(s).

Original language	English
Article number	041702
Journal	Applied Physics Letters
Volume	124
Issue number	4
Online published	24 Jan 2024
DOIs	https://doi.org/10.1063/5.0185546
Publication status	Published - Jan 2024

Funding

We acknowledge the financial support by the National Key R&D Program of China (Grant No. 2022YFB2903102); the National Natural Science Foundation of China (Grant Nos. 6202201, 62105087, 62105088, 61875052, 61905059, and 12204141); the Key R&D Program of Anhui Province (Grant No. 202104a07020010); the Natural Science Foundation of Anhui Province (Grant Nos. 1908085QF273 and 2108085QF282); the Fundamental Research Funds for the Central Universities (Grant No. JZ2022HGTB0248); and the Innovation and Technology Commission of Hong Kong (ITF Grant reference no. GHP/026/19GD

Publisher's Copyright Statement

COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared Xiaolin Chen, Weiqing Gao, Dangyuan Lei; Giant broadband spin-selective asymmetric transmission and wavefront shaping in transition-metal-dichalcogenide-based chiral metasurfaces. Appl. Phys. Lett. 22 January 2024; 124 (4): 041702 and may be found at https://doi.org/10.1063/5.0185546.

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title = "Giant broadband spin-selective asymmetric transmission and wavefront shaping in transition-metal-dichalcogenide-based chiral metasurfaces",

abstract = "Multidimensional spin-selective manipulation of optical waves is crucial for various intriguing applications in modern nanophotonics, such as quantum-information processing and chiral sensing and imaging. In this work, we observed giant broadband asymmetric transmission of circularly polarized waves and spin-preserving reflection, together with near-unity transmission circular dichroism, in a planar chiral metasurface composed of high-index transition-metal-dichalcogenide nanoantennas with large material anisotropy. The perpendicular and parallel electric and magnetic dipole moments excited in the nanoantennas under circularly polarized waves are explored to account for the asymmetric transmission and optical chirality. Combined with the Pancharatnam-Berry phase, we achieved the wavefront manipulation for transmitted circularly polarized waves with an efficiency approaching 91.5% and spin-selective focusing of an incident light via a metasurface metalens. Our work will pave the way for studying the multidimensional manipulation of optical spins through engineering transition-metal-dichalcogenide-based metasurfaces. {\textcopyright} 2024 Author(s).",

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AU - Lei, Dangyuan

PY - 2024/1

Y1 - 2024/1

N2 - Multidimensional spin-selective manipulation of optical waves is crucial for various intriguing applications in modern nanophotonics, such as quantum-information processing and chiral sensing and imaging. In this work, we observed giant broadband asymmetric transmission of circularly polarized waves and spin-preserving reflection, together with near-unity transmission circular dichroism, in a planar chiral metasurface composed of high-index transition-metal-dichalcogenide nanoantennas with large material anisotropy. The perpendicular and parallel electric and magnetic dipole moments excited in the nanoantennas under circularly polarized waves are explored to account for the asymmetric transmission and optical chirality. Combined with the Pancharatnam-Berry phase, we achieved the wavefront manipulation for transmitted circularly polarized waves with an efficiency approaching 91.5% and spin-selective focusing of an incident light via a metasurface metalens. Our work will pave the way for studying the multidimensional manipulation of optical spins through engineering transition-metal-dichalcogenide-based metasurfaces. © 2024 Author(s).

AB - Multidimensional spin-selective manipulation of optical waves is crucial for various intriguing applications in modern nanophotonics, such as quantum-information processing and chiral sensing and imaging. In this work, we observed giant broadband asymmetric transmission of circularly polarized waves and spin-preserving reflection, together with near-unity transmission circular dichroism, in a planar chiral metasurface composed of high-index transition-metal-dichalcogenide nanoantennas with large material anisotropy. The perpendicular and parallel electric and magnetic dipole moments excited in the nanoantennas under circularly polarized waves are explored to account for the asymmetric transmission and optical chirality. Combined with the Pancharatnam-Berry phase, we achieved the wavefront manipulation for transmitted circularly polarized waves with an efficiency approaching 91.5% and spin-selective focusing of an incident light via a metasurface metalens. Our work will pave the way for studying the multidimensional manipulation of optical spins through engineering transition-metal-dichalcogenide-based metasurfaces. © 2024 Author(s).

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Giant broadband spin-selective asymmetric transmission and wavefront shaping in transition-metal-dichalcogenide-based chiral metasurfaces

Abstract

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ITF: Advanced Metasurface Material Based Information Encryption

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Giant broadband spin-selective asymmetric transmission and wavefront shaping in transition-metal-dichalcogenide-based chiral metasurfaces

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Publisher's Copyright Statement

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ITF: Advanced Metasurface Material Based Information Encryption

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