Article
Materials Science, Multidisciplinary
Yufeng Ding, Chengrong Wei, Huimin Su, Shuoyan Sun, Zhiyong Tang, Zhaona Wang, Guixin Li, Dahe Liu, Shangjr Gwo, Junfeng Dai, Jinwei Shi
Summary: This study presents a hybrid structure that combines a chirped surface plasmon metasurface with a monolayer transition metal dichalcogenide to achieve coherent second harmonic generation covering the entire visible light spectrum. The device demonstrates continuous resonance tuning and space-frequency locking, showing the potentials of a 2D material-plasmon hybrid metasurface for constructing an efficient broadband tunable on-chip coherent light source.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Optics
Zhi-Xiang LI, Dong Zhu, Pei-Cheng Lin, Peng-Cheng Huo, Hong-Kuan Xia, Ming-Ze Liu, Ya-Ping Ruan, Jiang-Shan Tang, Miao Cai, Hao-Dong Wu, Chao-Ying Meng, Han Zhang, Peng Chen, Ting Xu, Ke-Yu Xia, Li-Jian Zhang, Yan-Qing Lu
Summary: In this work, we demonstrate the generation of high-dimensional entanglement using a single dielectric metasurface. By modulating the multiple degrees of freedom of photons, we encode path, spin angular momentum, and orbital angular momentum information. Experimental results confirm the nonlocal correlations between the photons and quantum state tomography is performed. This scheme offers potential for on-chip quantum state manipulation in integrated quantum communication.
PHOTONICS RESEARCH
(2022)
Article
Optics
Ko-Han Shih, C. Kyle Renshaw
Summary: A method for designing multi-metasurface layouts for optical aberration correction is presented. All-dielectric metasurfaces are combined with conventional refractive optics to form a hybrid lens. This approach reduces diffraction loss by optimizing metasurfaces to control optical aberrations.
Article
Nanoscience & Nanotechnology
Yang Li, Guanqing Zhang, Yutao Tang, Xuecai Zhang, Wenfeng Cai, Yanjun Liu, Tun Cao, Guixin Li
Summary: A metal-silicon hybrid metasurface is proposed to generate strong third harmonic signals from an amorphous silicon film. By integrating the film into a gold plasmonic nanocavity and controlling the periods of the gold meta-atoms, the efficiency of the third harmonic generation process is greatly enhanced and provides new routes for developing silicon photonic devices with high optical nonlinearity.
Article
Optics
Jaeyeon Yu, Seongjin Park, Inyong Hwang, Daeik Kim, Frederic Demmerle, Gerhard Boehm, Markus-Christian Amann, Mikhail A. Belkin, Jongwon Lee
Summary: Nonlinear polaritonic metasurfaces, created by coupling intersubband nonlinearities in semiconductor heterostructures with optical modes in nanoresonators, have demonstrated efficient frequency mixing at very low pumping intensities. This electrically tunable nonlinear metasurface combines a plasmonic nanocavity and a quantum-engineered semiconductor heterostructure, enabling spectral tuning, dynamic intensity modulation, and dynamic beam manipulation for second-harmonic generation. This work paves the way for electrically reconfigurable flat nonlinear optical elements with versatile functionalities.
Article
Multidisciplinary Sciences
Shingo Toyoda, Manfred Fiebig, Taka-hisa Arima, Yoshinori Tokura, Naoki Ogawa
Summary: Mirror symmetries play a crucial role in fundamental properties and conservation laws, with potential magnetoelectric cross-coupling when both spatial inversion and time reversal are broken. The giant nonreciprocal optical response observed in SHG of CuB2O4 is due to interference between magnetic-dipole and electric-dipole contributions, showing the potential for nonreciprocal nonlinear optical functionalities in multiferroics and magnetoelectrics. Resonantly enhanced magnetic-dipole transitions contribute significantly to the nonreciprocity, maximizing the effect despite the inherently weaker nature compared to electric-dipole transitions.
Article
Materials Science, Multidisciplinary
Tingting Liu, Xinyuan Fang, Shuyuan Xiao
Summary: Engineering nonlinear optical processes in dielectric nanostructures using chalcogenide phase-change material allows for efficient tuning of second-harmonic generation processes. The nonlinear SHG signal from nanoantennas can be enhanced and modulated by optically induced Mie-type resonances and the amorphous-to-crystalline phase change in GST. By adjusting the refractive index of GST, a maximum modulation depth of up to 540% is demonstrated, showing the potential for control of optical nonlinearity and smart designing of tunable nonlinear optical devices.
Article
Materials Science, Multidisciplinary
Yousaf Murtaza Rind, Nasir Mahmood, Muhammad Qasim Mehmood, Tauseef Tauqeer, Muhammad Zubair, Yehia Massoud
Summary: Introduces all-dielectric transmissive metasurfaces based on the photonic spin Hall effect, which provide independent control of photons through phase multiplexing, with minimal noise and cross-talk. Demonstrates the functionality through multifocal metalenses that generate high-intensity focused spots under different polarized incidences. This research advances compact multifunctional device design in fields such as microscopy, communication, data storage, and imaging.
OPTICAL MATERIALS EXPRESS
(2023)
Article
Nanoscience & Nanotechnology
Rabindra Biswas, Asish Prosad, Lal A. S. Krishna, Sruti Menon, Varun Raghunathan
Summary: This study demonstrates the enhancement of second harmonic generation (SHG) from multilayer structures of gallium selenide (GaSe) flakes integrated with Fabry-Perot structures using hybrid-genetic optimization (HGA). The HGA technique significantly speeds up the design process and achieves 128-fold and 400-fold SHG enhancement in single and double GaSe structures, respectively, compared to a reference sample. The SHG conversion efficiencies obtained from the HGA structures are significantly higher than previous reports on 2D material integrated resonant metasurfaces or Bragg cavities.
Article
Chemistry, Multidisciplinary
Zhihang Guo, Junzi Li, Jiechun Liang, Changshun Wang, Xi Zhu, Tingchao He
Summary: This study synthesized two pairs of lead-free chiral HMHs and explored their performance in terms of optical activity and second-harmonic generation, providing insights into regulating the optical activity of chiral HMHs.
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)
Article
Chemistry, Multidisciplinary
Yu Chu, Hongshan Wang, Tudi Abutukadi, Zhi Li, Miriding Mutailipu, Xin Su, Zhihua Yang, Junjie Li, Shilie Pan
Summary: An unprecedented wide bandgap Hg-based IR NLO material Zn2HgP2S8 (ZHPS) with diamond-like structure is rationally designed and fabricated by a tetrahedron re-organization strategy with the aid of structure and property predictions. ZHPS exhibits a wide bandgap of 3.37 eV, which is the largest one among the reported Hg-based chalcogenide IR NLO materials and first breaks the 3.0 eV bandgap wall in this system, resulting in a high laser-induced damage threshold (LIDT) of similar to 2.2 x AgGaS2 (AGS). Meanwhile, it shows a large NLO response (1.1 x AGS), achieving a good balance between bandgap (>= 3.0 eV) and NLO effect (>= 1 x AGS) for an excellent IR NLO material.
Article
Optics
Marc Jankowski, Carsten Langrock, Boris Desiatov, Marko Loncar, M. M. Fejer
Summary: We propose a new approach to supercontinuum generation and carrier-envelope-offset detection based on saturated second-order nonlinear interactions in dispersion-engineered nanowaveguides. The technique developed here broadens the interacting harmonics by forming stable bifurcations of the pulse envelopes due to an interplay between phase-mismatch and pump depletion. The scaling laws suggest that future realization based on this approach could enable supercontinuum generation with orders of magnitude less energy than current state-of-the-art devices.
Article
Nanoscience & Nanotechnology
Jicheng Jin, Jian Lu, Bo Zhen
Summary: Second harmonic dipoles generated in a nonlinear photonic crystal slab can be completely nonradiative, resulting in no energy transfer from the fundamental frequency to the second harmonic even when the phase-matching condition is satisfied - a phenomenon known as resonance-forbidden second-harmonic generation. Through numerical simulation, two mechanisms for achieving this phenomenon have been identified: symmetry protection and parameter tuning. The finite-size effect and the topological origin of this phenomenon are also discussed.
Article
Physics, Applied
Zhenkun Lin, Yuning Zhang, K. W. Wang, Serife Tol
Summary: This study presents a concept of nonlinear acoustic metasurface that utilizes the nonlinearity of locally resonant unit cells for wavefront control. Through numerical and experimental validation, the study explores nonlinear phenomena such as wave steering, wave focusing, and self-bending propagation. The proposed nonlinear metasurface effectively achieves significant second-harmonic generation and separation for wavefront control of acoustic waves, offering advanced technologies for manipulating acoustic waves.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Huatian Hu, Wen Chen, Xiaobo Han, Kai Wang, Peixiang Lu
Summary: Chiral single photons are a new research frontier in quantum optics, providing additional degrees of freedom for binary information encoding and nonreciprocal information transmission. A proposed emitter-coupled nanobar-on-mirror antenna platform offers significant local chirality and giant Purcell factor for efficient single photon conversion and emission.
Article
Nanoscience & Nanotechnology
Nan Deng, Hua Long, Kun Wang, Xiaobo Han, Bing Wang, Kai Wang, Peixiang Lu
Summary: In this study, the optical anisotropy of tungsten disulfide (WS2) flakes was characterized with scattering-type scanning near-field optical microscopy. The use of an Au substrate enhanced the contrast of the near-field fringes. The refractive indices of WS2 were determined through near-field imaging and theoretical calculations, and a high birefringence value was observed. This work provides experimental evidence for the potential application of WS2 in optoelectronic integrated circuits in the visible region.
Article
Optics
Xiaohong Li, Weiwei Liu, Yan Gao, Yan Qin, Hua Long, Kai Wang, Bing Wang, Peixiang Lu
Summary: In this study, we demonstrate the two-photon pumped amplified spontaneous emission (ASE) in 2D RPPs flakes at room temperature. The RPPs flakes display tunable emission wavelengths and show excellent performance in two-photon pumped emission. Furthermore, we observe pump-wavelength-dependent frequency upconversion process in RPPs.
Article
Physics, Applied
Qingjie Liu, Zhinan Yan, Yingquan Ao, Bing Wang
Summary: This article reviews the current developments of Fano-resonant graphene metamaterials based on graphene plasmon and discusses their applications in sensors, switches, modulators, and slow-light devices.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Optics
Weiwei Liu, Yicong Zhang, Zhihua Deng, Jianghua Ye, Kai Wang, Bing Wang, Dingshan Gao, Peixiang Lu
Summary: A novel anti-PT-symmetric system is designed and constructed on a silicon-on-insulator chip, enabling on-chip chiral switching between symmetry-broken eigenmodes. The achieved chiral mode switching exhibits desirable performance features for practical applications in optical communication.
LASER & PHOTONICS REVIEWS
(2022)
Article
Nanoscience & Nanotechnology
Yang Chen, Shuhang Qian, Kai Wang, Xiangyuan Xing, Andrew Wee, Kian Ping Loh, Bing Wang, Dong Wu, Jiaru Chu, Andrea Alu, Peixiang Lu, Cheng-Wei Qiu
Summary: Valleytronics, a promising technology for energy-efficient signal transport on chip, faces challenges in achieving high-fidelity, high-directionality, and room-temperature valley transport. In this study, a nanophotonic circuit is demonstrated to unidirectionally route valley indices using the chirality of photons, with 98% valley fidelity and a circulation directionality of 0.44 +/- 0.04 at room temperature. This research opens up possibilities for large-scale valleytronic networks and hybrid spin-valley-photon ecosystems at the nanoscale.
NATURE NANOTECHNOLOGY
(2022)
Article
Optics
Shan Li, Shaolin Ke, Bing Wang, Peixiang Lu
Summary: This study demonstrates stable Dirac points in low dimensions by utilizing non-Hermiticity in an optical lattice. The stability of Dirac points is maintained even with dissipation variations, and they can develop into nodal rings in two dimensions. The research opens up possibilities for controlling the flow of light to aid dissipation while maintaining high stability of energy.
Article
Optics
Lingzhi Zheng, Bing Wang, Chengzhi Qin, Lange Zhao, Shuyue Chen, Weiwei Liu, Peixiang Lu
Summary: A waveguide coupler capable of both phase and intensity modulation is proposed to create a non-Hermitian Su-Schrieffer-Heeger lattice in the frequency dimension. The manipulation of on-site potential and anisotropic coupling of supermodes in waveguides is achieved by varying the modulation period and phase. Additionally, an artificial electric field associated with the modulation phase is introduced. The study demonstrates Zener tunneling in the non-Hermitian system, showcasing irreversible unidirectional conversion between odd and even supermodes.
Article
Chemistry, Analytical
Chen Niu, Zhenlin Hu, Xuemei Cheng, Aojun Gong, Kai Wang, Deng Zhang, Shenglin Li, Lianbo Guo
Summary: The study aims to address the problem of attributing single particle sources of atmospheric aerosols in air pollution research. A new technique combining optical trapping with spectroscopy methods was proposed to analyze the source of single aerosol particles. The results showed that the combination of gated Raman spectroscopy and laser-induced breakdown spectroscopy (LIBS) in a levitated micron aerosol allowed for precise qualitative evaluations of different mineral aerosols and coal aerosols from various regions. Machine learning algorithms were also employed to improve the accuracy of the analysis. This research has significant implications for online aerosol analysis, aerosol monitoring, and early warning systems.
ANALYTICAL CHEMISTRY
(2023)
Article
Optics
Wenhui Yu, Xiang LI, Bing Wang, Junle Qu, Liwei Liu
Summary: Optical diffraction tomography (ODT) is a high-resolution imaging technique that allows imaging of the endogenous structure of matter. This article presents the theoretical basis and experimental considerations for ODT of second-order nonlinear structures in weak scattering media. The proposed method shows promising applications in nonlinear microscopy.
Article
Multidisciplinary Sciences
Shulin Wang, Chengzhi Qin, Weiwei Liu, Bing Wang, Feng Zhou, Han Ye, Lange Zhao, Jianji Dong, Xinliang Zhang, Stefano Longhi, Peixiang Lu
Summary: This study demonstrates higher-order dynamic localization of photons in a synthetic temporal mesh lattice and discusses the idea of tunable temporal cloaking by combining different-order localizations.
NATURE COMMUNICATIONS
(2022)
Article
Optics
He Huang, Yaoshuai Li, Chengzhi Qin, Wenwan Li, Lange Zhao, Chen Liu, Bing Wang, Chi Zhang, Peixiang Lu
Summary: In this study, the spectral self-imaging effect for a frequency comb is demonstrated using a four-wave mixing time lens. The time lens is created by applying a temporal quadratic phase modulation to the input signal pulses, which results in a frequency comb in the Fourier spectrum. The modulation is achieved by a Gaussian pump pulse in an external single-mode fiber. When both the signal and pump pulses are injected into a highly nonlinear fiber, four-wave mixing Bragg scattering occurs, leading to periodic revivals of the input frequency comb as the pump pulse propagates periodically. The study also reveals the impact of the envelope width of input pulses on the output spectrum width.
Article
Multidisciplinary Sciences
Shulin Wang, Chengzhi Qin, Lange Zhao, Han Ye, Stefano Longhi, Peixiang Lu, Bing Wang
Summary: This paper introduces a new class of reconfigurable linear optics circuits harnessing Floquet LZT, which has versatile applications in temporal beam control, signal processing, quantum simulations, and information processing.