Article
Physics, Applied
Zhancheng Li, Yifan Jiang, Wenwei Liu, Yuebian Zhang, Hua Cheng, Junjie Li, Jianguo Tian, Shuqi Chen
Summary: We demonstrate that hybrid bilayer plasmonic metasurfaces, fabricated through a simple one-step nanofabrication process, are ideal candidates for realizing intrinsic chiral optical responses and spin-selective transmission. The proposed metasurfaces offer advantages such as compact design, easy control of chiral optical response, and lower fabrication demand, thus expanding the application potential of chiral plasmonic nanostructures in spin nanophotonics, nonlinear optics, and optical sensing.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Shuxia Zhao, Lei Shao, Jianfang Wang, Hai-Qing Lin, Wei Zhang
Summary: The study reveals that optical chirality can be significantly increased by coupling between localized surface plasmon resonances and lattice resonances, even for metasurfaces made of achiral unit cells. Interlayer coupling generally destroys Wood's anomaly and transparency. By utilizing Pancharatnam-Berry phase and propagation phase, chirality-selective transparency can be achieved in a designed structure with a high absorption g-factor close to the upper limit of 2.
PHOTONICS RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Yin Liu, Sze Cheung Lau, Wen-Hui Cheng, Amalya Johnson, Qitong Li, Emma Simmerman, Ouri Karni, Jack Hu, Fang Liu, Mark L. Brongersma, Tony F. Heinz, Jennifer A. Dionne
Summary: In this study, integration of MoS2 monolayers with a chiral silicon disk array metasurface is used to enhance and control the absorption and emission of excitons in two-dimensional transition metal dichalcogenides. The metasurface coupling enhances the intensity and shortens the lifetime of excitons, trions, and defect bound excitons, and also modifies their spectral shape. Furthermore, the degree of polarization of exciton and trion emission from the valley is symmetrically enhanced at 100 K, resulting from the metasurface-enhanced chiral absorption and the metasurface-enhanced exciton emission from the Purcell effect. The combination of Si-compatible photonic design and large-scale integration of 2D materials in this work is a crucial step towards on-chip valleytronic applications at room temperature.
Article
Nanoscience & Nanotechnology
Biyuan Wu, Mingjun Wang, Yasong Sun, Feng Wu, Zhangxing Shi, Xiaohu Wu
Summary: Chirality, as a fundamental property of nature, has potential applications in various fields. In this study, a novel plasmonic chiral metasurface with rectangular holes was systematically investigated, and it was found to exhibit strong circular dichroism in the near-infrared wavelength. The research also revealed the impact of the metasurface structure parameters and the rotation angle of the resonance units on circular dichroism. The chirality can be effectively regulated by changing the orientation of the units. Furthermore, simulations were conducted to reveal the underlying mechanism.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Crystallography
Yaolin Hu, Suxia Xie, Chongjun Bai, Weiwei Shen, Jingcheng Yang
Summary: In this study, a chiral quasi-BIC is proposed by breaking the out-of-plane mirror and in-plane C-2 rotation symmetries in a bilayer metallic metasurface, which enables spin-selective terahertz transmittance. Precise tuning of structural parameters allows for anticipated chiroptical performance, and a high surrounding refractive index sensitivity is achieved.
Article
Materials Science, Multidisciplinary
Shuaijun Liu, Xuan Liu, Yongzhen Wu, Diwei Zhang, Yue Wu, He Tian, Zhigang Zheng, Wei -Hong Zhu
Summary: This study demonstrates the achievement of high-brightness and stable circularly polarized luminescence in chiral liquid crystal-based soft helix devices with a bilayer structure. The introduction of an optimized polyacrylonitrile polymer significantly improves the luminescent efficiency and stability of perovskites while preserving the characteristics of chiral liquid crystals. This technique enables the fabrication of full-color circularly polarized luminescence devices with high g(lum) values.
Article
Automation & Control Systems
Xiaoyue Zhu, Chao Qian, Yuetian Jia, Jieting Chen, Yuan Fang, Zhixiang Fan, Jie Zhang, Dongdong Li, Reza Abdi-Ghaleh, Hongsheng Chen
Summary: Advanced wireless communication is achieved through index modulation with intelligent spatiotemporal metasurfaces, providing a simple and versatile platform for additional data transmission. The experimental demonstration shows the feasibility and potential for future smart cities.
ADVANCED INTELLIGENT SYSTEMS
(2023)
Article
Optics
Xiaoqing Luo, Xiang Du, Rixing Huang, Guangyuan Li
Summary: This study proposes and demonstrates chiral all-dielectric metasurfaces based on Mie surface lattice resonances (SLRs) with high quality factors and strong chirality. The high-Q and strong chirality are achieved by perturbing the lattice and tilting the incidence angle. These findings provide a new direction for realizing high-performance chiral metasurfaces and have great potential in biochemical sensing, emission or lasing, and nonlinear optics.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Sangtae Jeon, Soo Jin Kim
Summary: Circular dichroism (CD) is widely used in chemistry and biology to distinguish enantiomers, where nanostructured platforms can enhance optical chirality for effective chiral detection. Despite this, the underlying physics of optical chirality and resonance in nanostructures are still largely unexplored, making the optimization of chiral detection challenging.
APPLIED SCIENCES-BASEL
(2021)
Article
Multidisciplinary Sciences
Xiao Li, Chuanjie Hu, Yuan Tian, Youwen Liu, Huanyang Chen, Yadong Xu, Yangyang Fu
Summary: Helical dichroism (HD) has been used to explore chiral effects in wave systems, but the weak chiral signals limit its effectiveness. In this study, a new paradigm for achieving maximum HD through non-Hermitian gradient metasurfaces is introduced, demonstrating perfect chirality-selected vortex transmission.
Article
Multidisciplinary Sciences
Yang Chen, Huachun Deng, Xinbo Sha, Weijin Chen, Ruize Wang, Yu-Hang Chen, Dong Wu, Jiaru Chu, Yuri S. S. Kivshar, Shumin Xiao, Cheng-Wei Qiu
Summary: Photons with spin angular momentum possess intrinsic chirality, which has a wide range of applications. Current experimental attempts rely on false/extrinsic chirality, but this study has achieved true/intrinsic chiral response using resonant metasurfaces, achieving near-unity circular dichroism and a high quality factor for visible frequencies.
Article
Multidisciplinary Sciences
Soon Wei Daniel Lim, Joon-Suh Park, Dmitry Kazakov, Christina M. Spaegele, Ahmed H. Dorrah, Maryna L. Meretska, Federico Capasso
Summary: This research achieves the precise positioning of phase singularities using wavefront-shaping devices and metasurface technology, providing simplified and miniaturized solutions for applications such as optical traps and super-resolution microscopes.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Lin Yang, Yang-Yang Ju, Miguel A. A. Medel, Yubin Fu, Hartmut Komber, Evgenia Dmitrieva, Jin-Jiang Zhang, Sebastian Obermann, Araceli G. G. Campana, Ji Ma, Xinliang Feng
Summary: The synthesis of helical bilayer nanographenes with new topology has attracted great interest due to their unique physicochemical properties. In this study, the first helical bilayer nonbenzenoid nanographene (HBNG1) was successfully synthesized from a specially designed precursor. The HBNG1 not only possesses a novel [10]helicene backbone with two embedded heptagons, but also exhibits a highly twisted bilayer geometry with a record small interlayer distance of 3.2 angstrom. The close interlayer distance allows for intramolecular through-space conjugation, as evidenced by spectroelectrochemistry studies and DFT simulations. The chiroptical properties of the P/M enantiomers of HBNG1 were also evaluated using circular dichroism and circularly polarized luminescence.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Nanoscience & Nanotechnology
M. Albooyeh, V. Asadchy, J. Zeng, M. Rajaee, H. Kazemi, M. Hanifeh, F. . Capolino
Summary: By utilizing the fundamental electromagnetic properties of metasurfaces, we have developed a platform for classifying reciprocal bianisotropic metasurfaces and determining their isotropic, anisotropic, bi-isotropic, and bianisotropic properties. We have provided experimental guidelines for identifying each class using macroscopic scattering parameters, such as reflection and transmission coefficients, under plane wave illumination with linear and/or circular polarization. We have also clarified common confusions in the classification of anisotropic and chiral metasurfaces based on circular dichroism measurements.
Article
Optics
Zhonglei Shen, Shuting Fan, Wei Yin, Shengnan Li, Yafei Xu, Liuyang Zhang, Xuefeng Chen
Summary: A concise and general design principle is proposed to develop out-of-plane reflective chiral metasurfaces with maximum circular dichroism. The metasurfaces are fabricated using a simple and scalable three-dimensional printing technique. The experimental results validate the stability and strong chiroptical responses of the proposed metasurfaces. These findings have the potential to overcome the difficulties in design, optimization, and fabrication, and provide promising applications in emerging THz technologies.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Song Gao, Changyi Zhou, Wenwei Liu, Wenjing Yue, Shuqi Chen, Sang-Shin Lee, Duk-Yong Choi, Yang Li
Summary: In this study, a double dielectric metasurface based on two polarization-filtering meta-atoms is proposed as an efficient and simple solution to address the challenges of multilayered metallic metasurfaces in the visible band. The presented double dielectric metasurface exhibits multiple functionalities and significant advantages over traditional metallic metasurfaces in terms of design complexity, efficiency, and fabrication.
LASER & PHOTONICS REVIEWS
(2022)
Article
Physics, Applied
Zhancheng Li, Wenwei Liu, Dina Ma, Shiwang Yu, Hua Cheng, Duk-Yong Choi, Jianguo Tian, Shuqi Chen
Summary: Few-layer metasurfaces, artificial arrays composed of multiple functional layers, have the potential for integrated and miniaturized optical devices. This study presents an inverse design strategy based on deep-learning technology, which reduces the complexity and time cost of structural optimization.
PHYSICAL REVIEW APPLIED
(2022)
Article
Optics
Bo Yang, Dina Ma, Wenwei Liu, Duk-Yong Choi, Zhancheng Li, Hua Cheng, Jianguo Tian, Shuqi Chen
Summary: This research proposes a direct polarization detection method based on colorimetric asymmetrical all-dielectric metasurfaces, which can accurately measure the polarization angles of light. The double-layer nanopillars with independently tunable periods and diameters enable high-performance dual-color palettes, and the polarization detection network based on deep learning can accurately recognize slight polarization variations.
Article
Materials Science, Multidisciplinary
Zhancheng Li, Guangzhou Geng, Jiaqi Cheng, Wenwei Liu, Shiwang Yu, Boyang Xie, Hua Cheng, Junjie Li, Wenyuan Zhou, Jianguo Tian, Shuqi Chen
Summary: This paper investigates the feasibility of using nano rectangular hollow (NRH) metasurfaces to confine and manipulate Mie resonances in the frequency domain through theoretical and experimental analyses. By adjusting the diameter and side length of the NRH, the authors demonstrate the confinement of Mie resonances and manipulation of excitation wavelength. The potential applications of NRH metasurfaces in frequency-selective intensity encoding and optical encryption are presented.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Dina Ma, Zhancheng Li, Wenwei Liu, Guangzhou Geng, Hua Cheng, Junjie Li, Jianguo Tian, Shuqi Chen
Summary: This study proposes a hybrid framework based on a neural network and an evolutionary strategy for the inverse design of nanostructures with desired characteristics. By precisely controlling the resonance wavelength and bandwidth of the nanostructures, crosstalk between different wavelength channels can be eliminated, achieving the concept validation of multicolor meta-holography.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Leixin Liu, Wenwei Liu, Fei Wang, Hua Cheng, Duk-Yong Choi, Jianguo Tian, Yangjian Cai, Shuqi Chen
Summary: This study successfully manipulates the spatial coherence of light fields by loading different random phase distributions onto the wavefront, thereby generating partially coherent light with a predefined degree of coherence. This design strategy can easily be applied to manipulate arbitrary phase-only special beams with the same degree of coherence.
Article
Materials Science, Multidisciplinary
Jiaqi Cheng, Zhancheng Li, Duk-Yong Choi, Shiwang Yu, Wenwei Liu, Haoyu Wang, Yuebian Zhang, Hua Cheng, Jianguo Tian, Shuqi Chen
Summary: A new design strategy based on the collective interference effect in diatomic metasurfaces is proposed to achieve full and subtle intensity manipulation of circularly polarized optical waves. This design approach allows for convenient control of the reflection intensity of circularly polarized waves by changing a single structural parameter in the diatomic metasurface. The proposed approach has been experimentally demonstrated to enable high-level grayscale imaging with subwavelength spatial resolution, showing promise for advanced display and information encryption applications.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yifan Jiang, Wenwei Liu, Zhancheng Li, Duk-Yong Choi, Yuebian Zhang, Hua Cheng, Jianguo Tian, Shuqi Chen
Summary: Optical chirality, which plays an important role in physical photonics, biochemical processes, and molecular recognition, has recently been manipulated through the asymmetric optical responses of chiral nanostructures. This study introduces a design strategy to achieve spin-selective coding metasurfaces using amorphous silicon resonators with C-2 symmetry. The chiral coding metasurface allows for significant chiral transmission and wavefront control, expanding the information capacity in optical systems for both linear and nonlinear regimes.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Physics, Applied
Zhancheng Li, Yifan Jiang, Wenwei Liu, Yuebian Zhang, Hua Cheng, Junjie Li, Jianguo Tian, Shuqi Chen
Summary: We demonstrate that hybrid bilayer plasmonic metasurfaces, fabricated through a simple one-step nanofabrication process, are ideal candidates for realizing intrinsic chiral optical responses and spin-selective transmission. The proposed metasurfaces offer advantages such as compact design, easy control of chiral optical response, and lower fabrication demand, thus expanding the application potential of chiral plasmonic nanostructures in spin nanophotonics, nonlinear optics, and optical sensing.
APPLIED PHYSICS LETTERS
(2023)
