Article
Physics, Multidisciplinary
Karim Achouri, Andrei Kiselev, Olivier J. F. Martin
Summary: We present a frequency-domain modeling technique for second-order nonlinear metasurfaces, derived from the generalized sheet transition conditions (GSTCs). By extending the GSTCs to include effective nonlinear polarizations, the effective nonlinear susceptibilities of a given metasurface can be retrieved and its nonlinear scattering responses can be predicted under arbitrary illumination conditions. The proposed model can serve as a design platform for implementing complex nonlinear metasurface based applications.
NEW JOURNAL OF PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Fan Yang, Cristian Ciraci
Summary: We present a theoretical study on second-harmonic generation from a singular metasurface, which strongly interacts with incident light and generates intense surface polarization, resulting in the generation of second-harmonic field. By using transformation optics, the calculation of nonlinear optical response is simplified, and the dependence on the incident angle is weak, making it potentially useful for all-angle harmonic generation. Furthermore, we investigate the symmetry dependence of second-harmonic generation in the far field and demonstrate an enhanced conversion efficiency under normal incidence by breaking the surface inversion symmetry.
Article
Multidisciplinary Sciences
Mudassar Nauman, Jingshi Yan, Domenico de Ceglia, Mohsen Rahmani, Khosro Zangeneh Kamali, Costantino De Angelis, Andrey E. Miroshnichenko, Yuerui Lu, Dragomir N. Neshev
Summary: Researchers have successfully demonstrated enhanced single-beam second- and third-harmonic generation in a metasurface made of crystalline transition-metal-dichalcogenide material, offering the highest refractive index. The resonances of the metasurface allow for tuning of the unidirectional second-harmonic radiation in a forward or backward direction, presenting new opportunities for metasurface-based nonlinear light sources.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Lun Qu, Lu Bai, Chunyan Jin, Qiang Liu, Wei Wu, Bofeng Gao, Juntao Li, Wei Cai, Mengxin Ren, Jingjun Xu
Summary: Metasurfaces is an intriguing framework for nonlinear optics, offering compact design and flexibility in manipulating light. However, the nonlinearity is often limited due to the short interaction lengths with light. In this study, we demonstrate a record high efficiency of second harmonic generation using LN membrane metasurfaces, significantly improving the efficiency of nonlinear metasurfaces.
Review
Optics
Polina Vabishchevich, Yuri Kivshar
Summary: Nonlinear optics is well-established in studying the interaction between light and macroscopic nonlinear media, but the emerging field of optical metasurfaces provides a new platform for investigating nonlinear phenomena in planar geometries. Nonlinear optical metasurfaces introduce new functionalities to nonlinear optics by utilizing mode-matching, resonances, and relaxed phase-matching conditions. This review highlights recent advances in nonlinear metasurface photonics, including multi-frequency and cascading effects, asymmetric and chiral frequency conversion, nonperturbative nonlinear regimes, and nonlinear quantum photonics, enabled by the physics of Mie resonances and optical bound states in the continuum.
PHOTONICS RESEARCH
(2023)
Article
Optics
Junjun Ma, Fei Xie, Weijin Chen, Jiaxin Chen, Wei Wu, Wei Liu, Yuntian Chen, Wei Cai, Mengxin Ren, Jingjun Xu
Summary: LN metasurfaces with controllable SHG properties have been experimentally demonstrated, showing distinct enhancements for the SHG efficiency at Mie resonances. By changing geometric parameters and resonances of metasurfaces, authors manage to selectively boost the SHG efficiency at different wavelengths, paving the way for developing novel compact nonlinear light sources with high flexibility for applications like biosensing and optical communications.
LASER & PHOTONICS REVIEWS
(2021)
Review
Nanoscience & Nanotechnology
Luca Carletti, Marco Gandolfi, Davide Rocco, Andrea Tognazzi, Domenico de Ceglia, Maria Antonietta Vincenti, Costantino De Angelis
Summary: Optically resonant dielectric and semiconductor metasurfaces are promising areas of research in nanophotonics and light-matter interaction, with recent focus on active tuning of linear response and nonlinear effects. Dynamic nonlinear metasurfaces based on these materials could potentially meet the demand for integrated on-chip components with essential functionalities.
Article
Nanoscience & Nanotechnology
Chenglong Zheng, Jie Li, Guocui Wang, Jingyu Liu, Jitao Li, Zhen Yue, Hongliang Zhao, Xuanruo Hao, Yating Zhang, Yan Zhang, Jianquan Yao
Summary: The study introduces a silicon bifunctional metasurface capable of independent amplitude and phase modulation in two circular polarized channels, demonstrating versatility and flexibility with results consistent with theoretical expectations. The proposed method has applications in dynamic holography, dynamic display, and other fields.
Article
Materials Science, Multidisciplinary
Liangui Deng, Zile Li, Zhiqiang Guan, Jin Tao, Gongfa Li, Xiaoli Zhu, Qi Dai, Rao Fu, Zhou Zhou, Yan Yang, Shaohua Yu, Guoxing Zheng
Summary: It is shown that a bilayer metasurface can achieve arbitrary complex-amplitude modulation by arranging the orientation angles of nanostructures, increasing the lateral resolution and simplifying the design and fabrication process.
ADVANCED OPTICAL MATERIALS
(2023)
Review
Nanoscience & Nanotechnology
Sylvain Gennaro, Raktim Sarma, Igal Brener
Summary: This review summarizes the research on controlling optical wavefronts and enhancing nonlinear effects using metasurfaces with arrays of nanoscale resonators. The study focuses on the generation of harmonic light in GaAs metasurfaces and all-dielectric metasurfaces coupled to intersubband transitions in III-V semiconductor heterostructures. The review concludes by discussing the potential of metasurfaces as a platform for on-chip quantum light generation.
Article
Chemistry, Multidisciplinary
Yoonsoo Rho, SeokJae Yoo, Daniel B. Durham, DongJun Kang, Andrew M. Minor, Costas P. Grigoropoulos
Summary: Nonlinear optical response is a useful tool for studying the properties of materials, but its weak signal and limited reach make it difficult to probe deep-subwavelength-scale nonlinear optics. In this study, we propose a new method using an SHG-active plasmonic nanotip to achieve efficient second harmonic generation (SHG) nanoscopy. Our simulations suggest that enhancing the nonlinear response of the sample or suppressing the tip's response can lead to a high near-field SHG contrast, providing evidence of quantum mechanical nonlinear energy transfer. Furthermore, this technique can be used to study nanoscale corrosion and other physicochemical phenomena.
Article
Engineering, Electrical & Electronic
Ying Wang, Jun Xiao, Ting-Fung Chung, Zhaoyu Nie, Sui Yang, Xiang Zhang
Summary: This research reveals that electrically induced transitions between hexagonal and monoclinic phases of molybdenum ditelluride can be used to directly modulate the second-order susceptibility, enabling the fabrication of a second-harmonic-generation modulator with a high on/off ratio and broad bandwidth capabilities.
NATURE ELECTRONICS
(2021)
Article
Optics
Sergey S. Kruk, Lei Wang, Basudeb Sain, Zhaogang Dong, Joel Yang, Thomas Zentgraf, Yuri Kivshar
Summary: Assembling dissimilar nonlinear dielectric resonators into translucent metasurfaces, the asymmetric parametric generation of light in nonlinear metasurfaces is demonstrated, paving the way for innovative nanophotonic component designs.
Article
Nanoscience & Nanotechnology
Sander A. . Mann, Heedong Goh, Andrea Alu
Summary: Enabling strong nonlinear optical phenomena requires carefully designed photonic devices to maximize light-matter interactions. Topology optimization has been widely used in optimizing photonic devices due to its efficiency in dealing with large parameter spaces. However, the application of topology optimization in nonlinear effects in dielectric structures is limited.
Article
Physics, Multidisciplinary
Timo Stolt, Jeonghyun Kim, Sebastien Heron, Anna Vesala, Younghwan Yang, Jungho Mun, Minkyung Kim, Mikko J. Huttunen, Robert Czaplicki, Martti Kauranen, Junsuk Rho, Patrice Genevet
Summary: This study demonstrates phase-matched second-harmonic generation (SHG) from three-dimensional metamaterials consisting of stacked metasurfaces. By utilizing phase engineering of metasurfaces at interacting wavelengths, they achieved phase-matched SHG in the unconventional backward direction, with SHG signal scaling superlinearly with the number of layers. Their results inspire further research to achieve higher conversion efficiencies and address more complex wave fronts.
PHYSICAL REVIEW LETTERS
(2021)
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
Optics
Xi Zhao, Zhancheng Li, Jiaqi Cheng, Wenwei Liu, Shiwang Yu, Yuebian Zhang, Hua Cheng, Jianguo Tian, Shuqi Chen
Summary: This study utilizes dielectric bilayer polyatomic metasurfaces to achieve the maximum optical intrinsic chirality over a wide bandwidth range, providing a new method for spin-selective optical wave manipulation.
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
Nanoscience & Nanotechnology
Yuttana Intaravanne, Muhammad Afnan Ansari, Hammad Ahmed, Narina Bileckaja, Huabing Yin, Xianzhong Chen
Summary: In this paper, a microscope with multiple functionalities is proposed and developed based on spatial multiplexing and polarization splitting. A novel geometric metasurface is used to achieve spiral phase profile and phase gradient profiles, enabling simultaneous imaging with different optical properties. Experimental results validate its capabilities in edge imaging, polarimetric imaging, and conventional microscope imaging.
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
Materials Science, Multidisciplinary
Yuttana Intaravanne, Muhammad Afnan Ansari, Hammad Ahmed, Xianzhong Chen
Summary: Polarization and wavelength are important properties of light. Engineered polarization and wavelength profiles have gained interest due to their unique optical features. Traditional methods for simultaneous polarization and wavelength control suffer from limitations, but metasurfaces offer promising solutions. This study proposes and realizes polarization digital numbers with ten different wavelengths, using a geometric metasurface for wavelength multiplexing, phase multiplexing, and polarization rotation. The use of deep learning enhances digital number identification accuracy. This work provides more design flexibility by simultaneously controlling wavelength and polarization, with potential applications in virtual reality, image steganography, and anti-counterfeiting.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
Ruoxing Wang, Muhammad Afnan Ansari, Hammad Ahmed, Yan Li, Wenfeng Cai, Yanjun Liu, Songtao Li, Jianlong Liu, Li Li, Xianzhong Chen
Summary: Researchers have developed and demonstrated a compact high-resolution spectrometer with a multi-foci metalens, which uses wavelength and phase multiplexing to accurately map wavelength information to focal points on the same plane.
LIGHT-SCIENCE & APPLICATIONS
(2023)
Article
Physics, Multidisciplinary
Hong Liang, Hammad Ahmed, Wing Yim Tam, Xianzhong Chen, Jensen Li
Summary: In this study, a geometric phase metasurface is used to remotely and continuously control the vortex states of a heralded photon. Metasurfaces, which utilize engineered nanostructures, offer control over different dimensions of light and have versatile applications. By selecting the polarization of the heralding photon, the orbital angular momentum (OAM) of the signal photon can be remotely controlled. This research has important implications for quantum communication and information processing.
COMMUNICATIONS PHYSICS
(2023)
Article
Multidisciplinary Sciences
Hammad Ahmed, Muhammad Afnan Ansari, Yan Li, Thomas Zentgraf, Muhammad Qasim Mehmood, Xianzhong Chen
Summary: A metasurface is used to generate hybrid grafted perfect vector vortex beams with dynamic control. These beams have spatially variant rates of polarization change due to the involvement of more topological charges. The ability to dynamically control perfect vector vortex beams has not been reported before, and this study demonstrates their generation and control using a multifunctional metasurface and a rotating half waveplate.
NATURE COMMUNICATIONS
(2023)
