纳米光子学中的光学涡旋 -

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纳米光子学中的光学涡旋

1.
Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, LudwigMaximilians-Universität München, München, 80539, Germany
2.
Department of Physics, Imperial College London, London SW7 2AZ, United Kingdom
3.
MQ Photonics Research Centre, Department of Physics and Astronomy, Macquarie University, Australia

中图分类号:O439
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出版历程
- 收稿日期:2021-03-25
- 修回日期:2021-04-19
- 网络出版日期:2021-05-24
- 刊出日期:2021-07-01

Optical vortices in nanophotonics

doi:10.37188/CO.2021-0066

1.
Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, LudwigMaximilians-Universität München, München, 80539, Germany
2.
Department of Physics, Imperial College London, London SW7 2AZ, United Kingdom
3.
MQ Photonics Research Centre, Department of Physics and Astronomy, Macquarie University, Australia

Funds:Supported by China Scholarship Council National Construction High-Level University Public Postgraduate Project (No. 201906120420)

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Author Bio:
Mr Chenhao Li received his B.E.in Electronics Science and Technology from Harbin Institute of Technology in 2017. In 2019, he obtained M.Eng in Physical Electronics from Harbin Institute of Technology. Currently he is a PhD candidate at Ludwig-Maximilians-Universität Münchenin Germany supported by an LMU-CSC scholarship. His current research interests include nanophotonics and nanofabrication andtheir applications. E-mail:chenhao.li@physik.uni-muenchen.de
Dr Haoran Ren gained his PhD in February 2017 at Swinburne University of Technology in Australia. From 2016 to 2018, he was a postdoc at RMIT University in Australia. In October-December 2018, he won a Victoria Fellowship to visit the National Centre for Scientific Research (CNRS) in France. From 2019 to 2020, he was a former Humboldt Research Fellow at Ludwig Maximilian University of Munich in Germany. In December 2020, Dr Ren relocated his research back to Australia and hold a Macquarie University Research Fellowship. His research interests include nanophotonics, structured light, optical holography, plasmonics, integrated photonics, and optical fibers

Corresponding author:Haoran.Ren@mq.edu.au

摘要

摘要:在过去的二十年中，携带轨道角动量的涡旋光引起了研究人员的广泛兴趣。涡旋光不仅在光与物质相互作用中扮演着重要角色，而且可极大拓宽光学信息的承载容量。与此同时，纳米科技的发展使得纳米光子学成为一个新兴学科，开辟了利用纳米结构和器件对光进行调控的新途径。当纳米技术和涡旋光相结合时，衍生出许多新的思路和概念。本文回顾和总结了基于纳米光子学的涡旋光产生、探测及其应用，并对该研究领域的未来进行了展望。
- 纳米光子学/
- 涡旋光/
- 纳米结构与器件
Abstract:In the last two decades, optical vortices carried by twisted light wavefronts have attracted a great deal of interest, providing not only new physical insights into light-matter interactions, but also a transformative platform for boosting optical information capacity. Meanwhile, advances in nanoscience and nanotechnology lead to the emerging field of nanophotonics, offering an unprecedented level of light manipulation via nanostructured materials and devices. Many exciting ideas and concepts come up when optical vortices meet nanophotonic devices. Here, we provide a minireview on recent achievements made in nanophotonics for the generation and detection of optical vortices and some of their applications.
- nanophotonics/
- optical vortices/
- Nanostructures and devices

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Figure 1.Schematics of the SAM and OAM of light. (a) Left or right circular polarization light with SAM of 1 or −1; (b) Two kinds of light carrying different OAM states with −1, 1 as well as their phase and intensity distribution at bottom row, respectively.

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Figure 2.Nanophotonic generation of optical vortices using metasurfaces. (a) A dynamic phase metasurface imprinted with a spiral phase profile. (b) A spin-to-orbital conversion L-shape metasurface for the generation of optical vortices with $ l=\pm 2 $ . (c) An interleaved geometric metasurface for the simultaneous generation of multiple optical vortices carrying different OAM modes. (d) A J-plate metasurface based on a new concept of arbitrary spin-orbit conversion. The images in (a)-(d) were adapted from Refs.36-39, respectively.

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Figure 3.Generation of OAM-carrying optical vortices via dielectric and plasmonic resonators. (a) An array of OAM vortex WGM emitters. (b) An OAM microlaser. (c) A silicon waveguide-based OAM multiplexer. (d) Principle of a chirality-tunable OAM microlaser. (e) A perovskite BIC metasurface. (f) A plasmonic vortex resonator. (g) Schematic of a plasmonic skyrmion imaged through a time-resolved two-photon photoemission electron microscope. The images in (a)-(g) were adapted from Refs. 41-47, respectively.

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Figure 4.Plasmonic and photocurrent detection of optical vortices. (a) A holographic plasmonic metasurface was used to detect a single OAM mode in the near-field. (b) An ultracompact OAM-demultiplexing chip. (c) A plasmonic topological insulator-based OAM nanometrology chip. (d) Photocurrent detection of incident optical vortices. The images in (a)-(d) were adapted from Refs. 49, 23, 24, 50 respectively.

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Figure 5.Optical trapping and edge-enhancement imaging using optical vortices. (a) A particle trapped by the OAM and SAM of light, respectively. (b) A particle necklace consisting of 26 particles, trapped by a vortex beam. (c) Edge-enhancement imaging based on an optical vortex beam. The images in (a)-(c) were adapted from Refs 27, 95 and 121, respectively.

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Figure 6.Principle of OAM holography. (a) Schematic of an OAM-preserving hologram capable of transferring the OAM property from an OAM incident beam to a holographic image. The inset (right top) shows the OAM property transfer in the spatial frequency domain (k-space). The inset (right bottom) presents the phase (φ) and intensity (I) distributions of single pixels in the reconstructed holographic images, respectively. Pseudo colors are used to visualize different OAM modes. (b) Schematic of an OAM-selective hologram sensitive to a given OAM mode. The inset (right top) shows the OAM conversion from an incident OAM beam to a fundamental spatial mode after passing through an OAM-selective hologram. The inset (right bottom) presents the phase (φ) and intensity (I) distributions of single pixels in the reconstructed holographic images using different OAM modes. High intensity is achieved in each pixel whenever the incident light has a topological charge matching the design of the interface. (c) Schematic of an OAM-multiplexing hologram capable of reconstructing multiple distinctive OAM-dependent holographic images.Fig. 6is adapted from Ref. 122.

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Figure 7.Principle of high-bandwidth twisted light holography based on a complex-amplitude metasurface hologram. (a) Time-dependent OAM incident beams impinge on a large-scale complex-amplitude metasurface hologram to reconstruct two holographic videos consisting of a large number of OAM-dependent image frames. (b) SEM and optical (bottom left inset) images of a fabricated complex-amplitude OAM-multiplexing metasurface hologram. Enlarged SEM images of nanopillars are given on the right side.Fig. 7was adapted from Ref. 123.

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