Article
Materials Science, Multidisciplinary
Bryson Krause, Dhananjay Mishra, Jiyang Chen, Christos Argyropoulos, Thang Hoang
Summary: This study demonstrates enhanced second-harmonic generation and second-order nonlinear exciton-polariton strong coupling response using plasmonic nanopatch antennas (NPAs), providing important insights for nonlinear control of light-matter interactions in optical engineering and information processing.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Hani Barhum, Cormac McDonnell, Tmiron Alon, Raheel Hammad, Mohammed Attrash, Tal Ellenbogen, Pavel Ginzburg
Summary: Large-scale kainic acid single crystals were synthesized and studied for their linear and nonlinear optical properties. The non-centrosymmetric zwitterionic crystallization, molecular structure, and inter-molecular arrangement enhance the second-order optical nonlinearity of the crystal. The crystals exhibit good transparency in a broad spectral range and show enhanced second-harmonic generation and broadband THz generation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Optics
Alexander W. A. Murphy, Zichen Liu, Andrey V. Gorbach, Adelina Ilie, Ventsislav K. Valev
Summary: The study presents the first hyperspectral multiphoton analysis of densely-packed stacks of twisted and/or fused WS2 nanosheets, known as nanomesh, which exhibits scalable, efficient, and broadband optical properties due to double resonances induced by internal defects. This makes the nanomesh a prime candidate for integration into quantum optical technologies.
LASER & PHOTONICS REVIEWS
(2021)
Article
Optics
Ying Xie, Hao Yu, Jiahui Wei, Haohai Yu, Huaijin Zhang
Summary: Materials based on group IV chalcogenides have extensive technological importance due to their unique chemical bonding and off-centering of in-layer sublattices. In this study, large-area SnS multilayer films were fabricated and unexpectedly strong second-harmonic generation (SHG) response was observed. The results suggest that multilayer SnS could be a promising nonlinear material with potential applications in optics and photonics.
Article
Chemistry, Multidisciplinary
Bin Zhang, Jan E. Stehr, Ping-Ping Chen, Xingjun Wang, Fumitaro Ishikawa, Weimin M. Chen, Irina A. Buyanova
Summary: This study demonstrates highly efficient second-harmonic generation in subwavelength wurtzite (WZ) GaAs nanowires, providing an effective strategy for enhancing and manipulating the nonlinear optical response in nanowires through lattice engineering.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Multidisciplinary Sciences
Rabindra Biswas, Medha Dandu, Asish Prosad, Sarthak Das, Sruti Menon, Jayanta Deka, Kausik Majumdar, Varun Raghunathan
Summary: Strong second-harmonic generation (SHG) has been observed from the 2H polytype of multilayer SnSe2 in the absence of excitonic resonances, with significant differences in SHG and Raman spectra between different polytypes and thickness-dependent behaviors. The enhanced nonlinear optical response at 1040 nm excitation is attributed to the near band-edge enhancement of nonlinear processes. The comparison of SHG from SnSe2 and MoS2 highlights the importance of considering the optical properties of 2D materials in nonlinear optical applications based on the wavelength range of interest.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Kunze Lu, Manlin Luo, Weibo Gao, Qi Jie Wang, Hao Sun, Donguk Nam
Summary: Despite the centrosymmetric nature of graphene, strain engineering can be used to manipulate its lattice arrangement and induce sublattice polarization, activating second harmonic generation (SHG). The SHG signal in strained graphene is boosted 50-fold at low temperatures due to resonant transitions between strain-induced pseudo-Landau levels. The second-order susceptibility of strained graphene exceeds that of hexagonal boron nitride with intrinsic broken inversion symmetry, opening up possibilities for high-efficiency nonlinear devices.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Jiaxing Du, Jianwei Shi, Chun Li, Qiuyu Shang, Xinfeng Liu, Yuan Huang, Qing Zhang
Summary: Researchers demonstrated a directional second harmonic generation (SHG) amplifier formed by MoS2/WS2 monolayer heterostructures, achieving significant enhancement of SHG and improved radiation angle, attributed to the excitation and emission field concentration induced by a vertical Fabry-Perot microcavity.
Article
Chemistry, Multidisciplinary
Chao Wu, Xingxing Jiang, Lin Lin, Yilei Hu, Tianhui Wu, Zheshuai Lin, Zhipeng Huang, Mark G. Humphrey, Chi Zhang
Summary: The study presents the synthesis of a polar NLO vanadate Cs4V8O22 (CVO) with excellent optical properties and strong second-harmonic generation effects achieved through hydrothermal synthesis.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Yuan Zhang, Yangchun Tan, Yangda Dong, Liyufeng Dai, Chuanlai Ren, Fengyuan Zhang, Lingping Zeng, Feng An, Changjian Li, Boyuan Huang, Gaokuo Zhong, Jiangyu Li
Summary: The Materials Genome Initiative aims to accelerate the discovery, development, manufacture, and deployment of advanced materials. This study introduces a high-throughput scanning second-harmonic-generation microscope that enables rapid screening and probing of polar materials. The technique is applied to investigate ferroelectrics and demonstrate its high-throughput capabilities using compositional-gradient and thickness-gradient films.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Qing Leng, Huanhuan Su, Jianqiang Liu, Lin Zhou, Kang Qin, Qianjin Wang, Junqi Fu, Shan Wu, Xuejin Zhang
Summary: The study investigates the second-harmonic generation of monolayer transition metal dichalcogenides on suspended silver film, showing a significant enhancement of the SHG signal. The enhancement is attributed to the electric field amplification induced by symmetric surface plasmon polaritons (SPPs) in the silver grating.
Article
Chemistry, Multidisciplinary
Zhuojun Liu, Jiayi Wang, Bo Chen, Yuming Wei, Wenjing Liu, Jin Liu
Summary: Two-dimensional layered materials like GaSe have shown promise as novel nonlinear optical materials, but their nonlinear responses are limited by short interaction lengths with light. By coupling 2D GaSe flakes to silicon metasurfaces, a significant enhancement of second-harmonic generation (SHG) has been achieved, opening up new possibilities for high-power coherent light sources.
Article
Optics
Hua Lu, Shouhao Shi, Dikun Li, Liping Hou, Shuwen Bo, Jianxu Zhao, Fajun Xiao, Dong Mao, Jianlin Zhao
Summary: Topological insulators (TIs) are a new state of matter attracting broad attention in the optics field. They have topologically-protected conducting surface states surrounding insulating bulk and exhibit prominent third-order optical nonlinearities in an ultrawide frequency range. In this study, an optical Tamm state is observed between an Sb2Te3 TI nanofilm and a 1D photonic crystal, and a self-enhancement behavior of optical nonlinearity is demonstrated in the TI nanofilm.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Wei-Jie Xie, Ru-Ling Tang, Sheng-Nan Yan, Nan Ma, Chun-Li Hu, Jiang-Gao Mao
Summary: Discovering new DUV nonlinear optical materials is a current research focus. However, integrating stringent performances, such as wide band gap and large NLO coefficient, into a crystal is challenging due to their natural incompatibility. This study proposes a boron-rich closed-loop strategy and successfully designs and synthesizes a new barium borate material, Ba4B14O25, which exhibits excellent NLO properties and holds promise as a DUV-transparent NLO candidate.
Article
Chemistry, Multidisciplinary
Emma Berger, Sasawat Jamnuch, Can B. Uzundal, Clarisse Woodahl, Hari Padmanabhan, Angelique Amado, Paul Manset, Yasuyuki Hirata, Yuya Kubota, Shigeki Owada, Kensuke Tono, Makina Yabashi, Cuixiang Wang, Youguo Shi, Venkatraman Gopalan, Craig P. Schwartz, Walter S. Drisdell, Iwao Matsuda, John W. Freeland, Tod A. Pascal, Michael Zuerch
Summary: The coexistence of ferroelectricity and metallicity in LiOsO3 is a surprising phenomenon, where the novel technique of XUV-SHG reveals sensitivity to the broken inversion symmetry in the polar metal phase. This opens up possibilities for studying symmetry-breaking structural phase transitions with element specificity on femtosecond time scales.
