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
Jiayi Wang, Zhuojun Liu, Jin Xiang, Bo Chen, Yuming Wei, Wenjing Liu, Yi Xu, Sheng Lan, Jin Liu
Summary: By utilizing the magnetic dipole (MD) Mie resonance, UV SHG from the LN nanosphere is significantly enhanced under the excitation of an fs laser at 750 nm, with a measured conversion efficiency of 4.45 x 10(-8). The single LN nanospheres achieved in this work could serve as Mie resonators for building nonlinear nanophotonic devices such as frequency converters and quantum light sources.
Article
Nanoscience & Nanotechnology
Tianzhu Zhang, Quanbing Guo, Zhifeng Shi, Shunping Zhang, Hongxing Xu
Summary: Efficient nonlinear optical process at the nanoscale is in high demand for integrating photonic devices. With coherent plasmon-exciton coupling, we achieved more than 3000-fold enhancement in second harmonic generation in a hybrid nanostructure. Polarimetric and layer-dependent measurements reveal the contributions of both plasmon and exciton components in the nonlinear interaction. Our work provides a new approach to enhance nonlinear conversion efficiency and sheds light on the coherent control of plasmon-exciton interaction.
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
Physics, Applied
Haiyuan Wei, Ziying Tang, Yan Shen, Huying Zheng, Yaqi Wang, Runchen Wang, Hai Zhu, Shichen Su, Yunliang Zhu, Jie Zhou, Zhi Ren Qiu
Summary: In this study, the progress of nanoengineering on noble metals and the extreme nonlinear optics within nanometric volumes are explored. Plasmonic nanostructures are found to offer a unique route for enhancing high-order harmonic generation and other nonlinear optical progress. The researchers demonstrated a strong third harmonic emission in zinc oxide microbelts through a strong localization of electromagnetic field caused by localized surface plasmon resonances. The intensity of third-harmonic generation was enhanced significantly in a composite of microbelts and Au nanoparticles, compared to the bare microbelts. Additionally, the polarization characteristics of the third-harmonic generation in the same system were improved significantly.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Junjun Shi, Xiaobo He, Wen Chen, Yang Li, Meng Kang, Yangjian Cai, Hongxing Xu
Summary: A dual cavity resonance scheme with remote excitation is developed to significantly enhance SHG in a nanobelt system. The enhancement is achieved through the cooperation of plasmonic and FP cavity modes.
Article
Chemistry, Multidisciplinary
Yun Zhao, Zhaoxi Chen, Cheng Wang, Yuanmu Yang, Hong-Bo Sun
Summary: In this experiment, efficient second-harmonic generation (SHG) and high-harmonic generation (HHG) were demonstrated from a LiNbO3 metasurface enhanced by guided-mode resonance. The metasurface showed high SHG efficiency and a wide range of HHG. This work may enable the development of compact coherent white-light sources in the deep ultraviolet region for spectroscopy and imaging applications.
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, Physical
Francois Aguillon, Andrei G. Borisov
Summary: In this work, the impact of atomic scale lattice imperfections on the nonlinear response of graphene nanoflakes enhanced by resonance between electromagnetic fields and localized plasmon is investigated theoretically. Using the many-body time-dependent density matrix approach, it is found that a single defect in nanoflakes with thousands of carbon atoms can significantly affect the nonlinear hyperpolarizability and override symmetry constraints. This effect cannot be captured by the relaxation time approximation in quantum or classical frameworks. The results of this study have important implications for the design of nonlinear graphene devices.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Yoshito Y. Tanaka, Tomoya Kimura, Tsutomu Shimura
Summary: A pair of V and Y-shaped gold nanoparticles are able to emit second harmonic (SH) radiation perpendicularly to the incident light direction, and the phase of this emission can be modulated by altering the shape of the Y-particle. This approach can be used to engineer directional nonlinear nanoantennas and nonlinear metamaterials.
Article
Physics, Applied
Lingrui Chu, Ziqi Li, Han Zhu, Feng Ren, Feng Chen
Summary: In this study, we demonstrate intense second-harmonic emission on embedded silver nanoparticle arrays fabricated by ion implantation. The interparticle coupling effect enhances the local field at the nanogap, amplifying the second-harmonic emission. The intensity of second-harmonic emission in these arrays is comparable to that of two-dimensional transition metal dichalcogenides and is independent of the incident polarization angles. This work provides a promising strategy for the rapid fabrication of low-cost nonlinear optical nanostructures.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Xian-Xin Wu, Wen-Yu Jiang, Xiao-Feng Wang, Li-Yun Zhao, Jia Shi, Shuai Zhang, Xinyu Sui, Zhe-Xue Chen, Wen-Na Du, Jian-Wei Shi, Qian Liu, Qing Zhang, Yong Zhang, Xin-Feng Liu
Summary: We have developed an efficient inch-scale SHG source through a solution-processed method by assembling gold nanoparticles with porous anodic alumina templates. Our device achieves multiresonance in both visible and near-infrared regions, providing strong electric field enhancement at the gap region. The SHG radiation produced is polarization-independent and shows wide-angle nonlinear response thanks to the unique geometry of the nanostructure.
Article
Optics
Gia Quyet Ngo, Emad Najafidehaghani, Ziyang Gan, Sara Khazaee, Malte Per Siems, Antony George, Erik P. Schartner, Stefan Nolte, Heike Ebendorff-Heidepriem, Thomas Pertsch, Alessandro Tuniz, Markus A. Schmidt, Ulf Peschel, Andrey Turchanin, Falk Eilenberger
Summary: This study demonstrates a method to achieve second-harmonic generation in functionalized optical fibers by directly growing highly nonlinear MoS2 monolayers on the fiber's core. The approach is scalable and can be generalized to other materials and waveguide systems.
Article
Optics
Xiyuan Lu, Gregory Moille, Ashutosh Rao, Daron A. Westly, Kartik Srinivasan
Summary: The research demonstrates efficient second-harmonic generation in silicon photonics through a combination of effective chi((2)) nonlinearity, resonant enhancement, and perfect phase matching. The breakthrough shows significantly higher conversion efficiency and output power than previous works, paving the way for further integration of self-referenced frequency combs and optical frequency references in the field.
Article
Materials Science, Multidisciplinary
Di Liu, Yanyan Huo, Yingying Ren, Yangjian Cai, Tingyin Ning
Summary: In this study, we numerically investigate the second harmonic generation (SHG) in hybrid plasmonic-photonic structures. We observe symmetry-protected bound states in the continuum (BICs) at normal incidence, and Friedrich-Wintgen BICs due to the coupling between localized surface plasmon resonances (LSPRs) and waveguide modes at oblique incidence. Our study shows significantly enhanced SHG near the BICs, which can be attributed to the enhanced local field due to hybrid modes of LSPRs and photonic modes.
RESULTS IN PHYSICS
(2023)
Article
Physics, Multidisciplinary
Jian Zeng, Zhi-Yuan Li
Summary: This paper presents a new quantum model to describe the optical response and spectral lineshape of a strongly coupled system. The model accurately predicts the experimental observation of Rabi splitting. This quantum theory provides valuable insights for the study of microscopic strongly coupled systems and has potential applications in quantum information processing, nano-optical integrated circuits, and polariton chemistry.
Article
Optics
Shanshan Chen, Chang-Yin Ji, Yu Han, Xing Liu, Yongtian Wang, Juan Liu, Jiafang Li
Summary: In this study, an abrupt sign reversal of circular dichroism (CD) between artificial plasmonic diastereoisomers was demonstrated. The sign of CD response was reversed by engineering the deformation height of nanostructures. The electromagnetic multipolar analysis revealed that the sign of CD was determined by phase-controlled excitations of electric quadrupole modes with handedness dependence. This research is significant for exploring profound chiroptics and applications in chirality switching, chiral biosensing, and chiral separation.
Article
Physics, Multidisciplinary
Ya-Ting Qiu, Li-Hong Hong, Zhi-Yuan Li
Summary: This work theoretically and systematically investigates the second harmonic generation (SHG) in a lithium niobate (LN) crystal by considering the transmission and reflection of TE-polarized pump light at the air-crystal interface. The physical process of light beam transport and nonlinear optical polarization generation in the crystal is described, and the reflection coefficient and transmission coefficient of pump light are derived. The conversion efficiency of the second-harmonic wave is found to depend on the transmission coefficient and other physical quantities, such as the length of the crystal and the amplitude of pump light, under the transmission and reflection models. The proposed analytical theory and formulation provide an accurate tool for evaluating the SHG energy conversion efficiency in practical situations and can be applied to other nonlinear optics problems.
Article
Physics, Applied
Lihong Hong, Baoqin Chen, Chenyang Hu, Peng He, Zhi-Yuan Li
Summary: In this study, ultrabroadband rainbow Cherenkov second-harmonic generation (UBR CSHG) was observed in a single periodically poled lithium niobate (PPLN) nonlinear crystal. The experimental results demonstrate the rich physics of nonlinear optical interactions and suggest the possibility of engineering broadband nonlinear frequency conversion for applications in compact colored laser sources.
PHYSICAL REVIEW APPLIED
(2022)
Article
Materials Science, Multidisciplinary
Xiaorong Hong, Qinghua Liang, Xing Liu, Chang-Yin Ji, Jiafang Li
Summary: Fractal and fractal-like designs have recently become highly interesting in scientific research. This study proposes and demonstrates fractal-like nano-kirigami structures with rotational symmetries, which can change their topological morphologies by growing fans and coiling units. The experimental manipulation of these structures is achieved through capillary force-induced 3D deformation process. The fractal-like designs allow for strong fractal dependence in structural deformations, enabling tailoring of stress threshold and reflection spectrum by adjusting the number of fans and coiling units. Furthermore, electrostatic forces are used to demonstrate the modulation of fractal nano-kirigami when external voltage is applied. These fractal nano-kirigami structures also have the potential to generate fractal-dependent optical vortices conveniently. The unique fractal design strategy presented in this work opens up new possibilities for functional 3D micro/nano structures with improved optical tunability and customization.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Xing Liu, Qinghua Liang, Xiaochen Zhang, Chang-Yin Ji, Jiafang Li
Summary: The nano-kirigami method allows for a wide range of structural geometries in optical micro/nano-devices, enhancing their functionalities. However, the current methodologies are limited, which hampers the utilization of chiral nano-kirigami structures in the visible wavelength region. In this study, various nano-kirigami strategies are comprehensively explored to demonstrate a bio-inspired nano-cilia metasurface with enhanced circular dichroism at visible wavelengths. By using electron-beam lithography and focused ion beam lithography, on-chip nano-cilia metasurfaces are successfully realized and validate the giant circular dichroism observed in simulations. This work expands the platform of micro/nano-scale manufacturing and provides an effective method for creating versatile bioinspired nanostructures with significant chiroptical responses.
Review
Materials Science, Biomaterials
Mingliang Ren, Bolin Yao, Bing Han, Cong Li
Summary: Immunotherapy has become a crucial therapy for cancer, and CAR-T immunotherapy has achieved remarkable success in hematological malignancies. However, applying CAR-T therapy to solid tumors faces challenges such as limited tumor accessibility, immunosuppressive tumor microenvironment, and antigen heterogeneity. Therefore, it is necessary to dynamically evaluate CAR-T cells' interactions with solid tumors, and nuclear imaging techniques like PET and SPECT can provide real-time evaluation of therapeutic responses.
Article
Physics, Multidisciplinary
Yafeng Huang, Junwei Xu, Ximin Tian, Pei Ding, Zhanjun Yu, Jie Li, Yaning Xu, Shenglan Zhang, Xiaolong Ma, Xiangyang Duan, Zhi-yuan Li
Summary: This paper proposes a design strategy based on a single-cell-designed approach to achieve spin-multiplexing and varifocal performance using pure PB phases. This novel design avenue shows great potential in applications such as imaging, optical storage, and optical interconnections.
Article
Physics, Applied
Zitao Ji, Jianfeng Chen, Zhi-Yuan Li
Summary: Topological photonics has shown great potential in manipulating electromagnetic waves and light. While there have been numerous studies on chiral topological photonic states, the achievements of antichiral topological photonic states have been limited. This Perspective reviews recent progress in the field, including basic concepts, properties, and applications of antichiral topological photonic states in magnetic photonic systems. The article also provides an outlook on emerging frontier topics, promising opportunities, fundamental challenges, and potential applications for antichiral magnetic topological photonics.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Optics
Jianbo Pan, Yidong Zheng, Jianfeng Chen, Zhi-Yuan Li
Summary: This article introduces the problem of electromagnetic wave transmission in a magneto-optical medium and describes several interesting physical images and classical physical variables using a simple and rigorous electromagnetic field solution approach. This theory can help deepen and broaden our understanding of basic electromagnetics, optics, and electrodynamics, and may provide insight into new ways and methods for high technologies in optics and microwaves.
Article
Optics
Lihong Hong, Chenyang Hu, Yuanyuan Liu, Huijun He, Liqiang Liu, Zhiyi Wei, Zhi-Yuan Li
Summary: In this study, a high-efficiency supercontinuum white laser with large bandwidth and high pulse energy was generated using a single nonlinear crystal. By exploiting the synergistic effects of high-harmonic generation and self-phase modulation, a 2.8-octave-spanning UV-Vis-IR supercontinuum white laser was achieved. This breakthrough has significant implications for various applications in basic science and high technology.
Article
Optics
Huakang Yu, Yipeng Lun, Jintian Lin, Yantong Li, Xingzhao Huang, Bodong Liu, Wanling Wu, Chunhua Wang, Ya Cheng, Zhi-yuan Li, Jacob B. Khurgin
Summary: This study presents a new on-chip diagnostic tool, T-FROG, for real-time full characterization of waveguided ultrashort optical pulses. Implemented on a thin-film lithium niobate platform, T-FROG accurately characterizes various properties of waveguided femtosecond pulses. In contrast to traditional techniques, T-FROG provides significant improvement by directly capturing temporal amplitude and phase profiles of ultrafast optical pulses inside photonic integrated circuits. The real-time in situ characteristics and dynamics of optical pulses offered by T-FROG show promise for their potential applications in the design, testing, and optimization of ultrafast photonic integrated circuits.
LASER & PHOTONICS REVIEWS
(2023)
Article
Optics
Xiaobin Li, Zhi-yuan Li, Wenyao Liang
Summary: The proposed research presents a tunable topological slow-light state in a photonic crystal waveguide using a unified magnetic field. The waveguide offers a compact structure, high maneuverability, and strong immunity to defects.
Article
Optics
Yuhao Huang, Gangchao Tang, Zhi-yuan Li, Wenyao Liang
Summary: This study presents mode conversion in different magneto-optical photonic crystal waveguides. By adjusting the geometric parameters, odd-mode and even-mode waveguides are designed, which can convert other modes into odd or even modes with almost no power loss. The waveguides are also robust against backscattering and can be used to efficiently separate odd and even modes.
Article
Optics
Qinglan Ling, Qinghua Liang, Xiaochen Zhang, Honglian Guo, Shuai Feng, Chang-Yin Ji, Jiafang Li
Summary: The study demonstrates the observation of chiral surface lattice resonances (SLRs) that are formed by the coupling of chiral toroidal electric dipole (TED) moment and Rayleigh anomaly (RA) mode. By engineering the rotational symmetry of a propeller metasurface, the electric dipole (electric quadrupolar) chiral SLRs evolve into TED-associated chiral SLRs. The excitation amplitude of the TED moment can be tailored by controlling the stereo twisted height of the propeller and the spin of the incident light.
