Article
Chemistry, Physical
Qun Xie, Linhui Guo, Zexuan Zhang, Panpan Gao, Mei Wang, Feng Xia, Kun Zhang, Peng Sun, Lifeng Dong, Maojin Yun
Summary: A monolayer terahertz graphene metasurface has been designed to achieve tunable plasmon-induced transparency effect in two perpendicular polarization directions based on surface plasmon polariton resonance. By adjusting the Fermi levels of graphene, penta-frequency and dual-frequency switches can be easily implemented, with excellent performances and high sensitivity. The designed metasurface also exhibits a good slow light effect, making it potentially useful for applications in switches, sensors, and slow-light devices.
APPLIED SURFACE SCIENCE
(2022)
Article
Physics, Applied
Li Han, Lin Wang, Huaizhong Xing, Xiaoshuang Chen
Summary: The study investigates plasmon-induced transparency phenomena in the mid-infrared caused by the coupling behavior between dipole and higher-order modes in graphene and black phosphorus nanoribbons. It shows that the transparent windows can be adjusted flexibly by varying the carrier concentration, and the carrier mobility and refractive index of the substrate are key factors affecting destructive interference. Obvious group delays near the transparent windows allow for achieving the slow light effect and help in understanding efficient exploration of surface plasmons with integrated properties from a family of two-dimensional materials.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Zhihui He, Lingqiao Li, Huqiang Ma, Lihui Pu, Hui Xu, Zao Yi, Xinliang Cao, Wei Cui
Summary: The study presents a highly sensitive sensor based on a graphene metasurface that can achieve tunable graphene plasmon-induced transparency in the terahertz band, providing high sensitivity and figure of merit for sensor performance.
RESULTS IN PHYSICS
(2021)
Article
Optics
Tao Zhou, Suguo Chen, Xiaoju Zhang, Xiang Zhang, Hui Hu, Yue Wang
Summary: In this work, a study of bright-bright mode electromagnetically induced transparency based on carbon nanotube films terahertz metasurface is presented. The formation mechanism of the transparent window is analyzed, and the sensing performance and slow light characteristics of the proposed metasurface are investigated. This study provides opportunities for electromagnetically induced transparency applications.
Article
Materials Science, Multidisciplinary
Naixing Feng, Jianxiang Yin, Huan Wang, Xuan Wang, Yuxian Zhang, Zhixiang Huang
Summary: Monolayer black phosphorus has the ability to excite infrared absorption, making it useful in optoelectronics. By designing patterned monolayer black phosphorus, we have achieved high infrared absorption, which is significant for various applications.
Article
Optics
Li Huang, Zhongpeng Jia, Bin Tang
Summary: In this study, a black phosphorus-based metamaterial is proposed, which can achieve tunable anisotropic plasmon-induced transparency effect by adjusting the carrier density and geometric parameters. The proposed metamaterial has potential applications in designing photonic devices in the mid-infrared region.
Article
Physics, Applied
Hong Wang, Yuting Zhang, Fangrong Hu, Mingzhu Jiang, Longhui Zhang, Wentao Zhang, Jiaguang Han
Summary: In this paper, an active dual-control electromagnetically induced transparency (EIT) analog is realized by using vanadium dioxide (VO2) metasurface on a sapphire substrate. The insulator-to-metal-transition (IMT) of VO2 can result in the reconstruction of the metasurface and control the EIT resonance when electrically stimulated. Experimental results show a modulation depth of 87.7% and a group delay of 2.7 ps at the central frequency of 0.56THz. This work paves a way for the development of THz modulators, switches, and slow light devices.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Mingming Chen, Xue-Xia Yang
Summary: A high-transmission and large group delay terahertz triple-band electromagnetically induced transparency (EIT) effect is achieved in a metal-perovskite hybrid metasurface. The results show that three transparent windows have transmission amplitudes of 0.83, 0.9, and 0.89, and maximum group delays of 7.64 ps, 4.07 ps, and 4.27 ps, respectively. By adjusting the conductivity of perovskite, the triple-band EIT effect and the slow light effect can be dynamically controlled with significant modulation depths.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Boxun Li, Yi Wei, Lili Zeng, Mingliang Liu, Ruquan Wen, Xingjiao Zhang, Chaosheng Deng
Summary: In this work, a perfect absorber based on a black phosphorus (BP) and bowtie shaped cavity is proposed, which exhibits high tunability and excellent optical performance. The absorption spectrum can be adjusted by changing the structural parameters, and the optical properties of BP can be controlled by applying an external electric field. The absorption and Q-factor can also be flexibly tuned by varying the polarization direction of incident light. This absorber has promising applications in optical switches, sensing, and slow light, providing new perspectives for the practical application of BP and possibilities for more applications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Optics
Rongrui Shi, Cheng Lei, Ting Liang, Taolong Wang, Shilin Liu
Summary: In this study, a tunable dual-plasmon-induced transparency (PIT) in the mid-infrared region was achieved using a new material structure. The dual PIT effect was regulated by changing the carrier concentration, and the effectiveness of the structure was validated through numerical simulations. The proposed structure shows great potential for sensing applications.
Article
Nanoscience & Nanotechnology
Wei Cui, Chunjiang Li, Huqiang Ma, Hui Xu, Zao Yi, Xincheng Ren, Xinliang Cao, Zhihui He, Zhimin Liu
Summary: A graphene-based metasurface for sensing in the terahertz band is proposed, achieving excellent sensing performance through the dual-plasmon induced transparency phenomenon. The results show high sensitivity and Figure of Merit values can be achieved in the terahertz band.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Multidisciplinary Sciences
Jie-Tao Liu, Zhi Liu
Summary: This study demonstrates robust and dynamically polarization-controlled tunable plasmon induced transparency (PIT) resonance in designed finite-array nanostructures metasurface. By analyzing near-field characteristics in reciprocal-space and far-field radiation features in real-space, the interference resonance physics of metasurface for plane-wave optical transmission and reflection is theoretically and thoroughly investigated. The distinctive polarization-selective and Q-tunable PIT shows robust features to performance degradations caused by fabrication flaws or geometry asymmetry-variations, paving way for the development of reconfigurable and flexible metasurface in nanophotonics applications.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Jin Yue, Songlin Chen, Furi Ling, Jianquan Yao
Summary: This study investigates a plasmon-induced transparency (PIT) sample based on a hybrid structure of metasurface/BiFeO3/Si in the terahertz range, demonstrating a distinct transparency window with a modulation depth of 82% achievable through tuning the optical pumping power. The research sheds new light on exploring the multiferroic material BiFeO3 and expanding practical applications of BFO-based functional devices in the terahertz range.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Physics, Multidisciplinary
Jianxing Zhao, Jianhong Zhou
Summary: We propose a graphene and STO integrated terahertz metasurface that can achieve the flexible manipulation of PIT effect through controlling the graphene antennas and adjusting the environmental temperature. This research is beneficial for designing flexibly manipulated THz devices.
Article
Physics, Multidisciplinary
Hu Bao-Jing, Huang Ming, Li Peng, Yang Jing-Jing
Summary: This paper proposes three plasmon-induced transparency (PIT) hybrid models based on the coupling of black phosphorus (BP) nanorods, triggering single-band, dual-band, and triple-band PIT effects by adjusting resonant frequencies and relaxation rates. The resonant frequencies in all models increase as the relaxation rate of BP changes, leading to blue shifts. Additionally, the transmittance at the dip frequency gradually decreases while the depth of depression increases. The single-band PIT model shows improved sensitivity and figure of merit compared to similar sensors, providing a theoretical reference for designing multiband filtering and ultrasensitive sensors.
ACTA PHYSICA SINICA
(2021)
Article
Nanoscience & Nanotechnology
Gordon H. Y. Li, Ryoto Sekine, Rajveer Nehra, Robert M. Gray, Luis Ledezma, Qiushi Guo, Alireza Marandi
Summary: The introduction of energy-efficient hardware accelerators has become necessary in recent years due to the computational demands of deep learning applications. Optical neural networks have shown promise as a potential solution, but their progress has been limited by a lack of energy-efficient nonlinear optical functions. This study demonstrates an all-optical Rectified Linear Unit (ReLU) using a periodically-poled thin-film lithium niobate nanophotonic waveguide, achieving ultra-low energies and near-instantaneous operation. This provides a practical path towards all-optical and energy-efficient nanophotonic deep learning.
Article
Physics, Multidisciplinary
Yuexin Zhang, Jie Tang, Sheng Zhang, Yuanjiang Xiang
Summary: The proposal of higher-order topology in condensed matter physics goes beyond the conventional bulk-boundary principle and leads to intriguing wave propagation properties. Exotic higher-order hinge and corner states have been revealed in lower dimensions through theoretical and experimental models. This concept has also been extended to semimetals and verified in acoustic and photonic systems. However, most existing schemes are limited to C-n-symmetric-like frameworks. In this work, a phononic higher-order Weyl semimetal (HOWSM) is introduced by deforming a traditional two-dimensional lattice with a vertical screw-extending operation, ensuring the emergence of higher-order Weyl points. The structure supports robust hinge wave transmission in a piling sample, providing new approaches for constructing HOWSMs and enriching potential applications in high-performance acoustic devices.
ANNALEN DER PHYSIK
(2023)
Article
Physics, Applied
Guangyuan Li, Xiuhua Yang
Summary: We propose an ultra-sensitive terahertz sensing platform based on the Rayleigh anomaly in hyperbolic metamaterial gratings, which provide super-high quality factor, ultra-high sensitivity, and extremely large figure of merit. This exceptional sensing performance is attributed to the strong local field enhancement and unique characteristics of hyperbolic metamaterial gratings. This work provides a novel strategy to design extremely sensitive sensors in terahertz and other frequency regimes.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Optics
Li Zhongfu, Hsun-Chi Chan, ShiXiang Xu, YuanJiang Xiang
Summary: In this study, two pairs of triply degenerate points (TDPs) are proposed in a 3D metamaterial by breaking the time reversal symmetry. Asymmetric surface states with spin-polarization are revealed based on these TDPs, and a topological chiral beam splitter is demonstrated. The study provides a new platform to study spin-polarization surface states and the enhanced spin photonic Hall effect in metamaterials.
Article
Physics, Applied
Shiwen Chen, Zhongfu Li, Yu Mao, Xiaoyu Dai, Yuanjiang Xiang
Summary: This paper investigates the impact of reflection-type merging BICs on the Goos-Hanchen shift (GH shift) and demonstrates a remarkable enhancement of the GH shift, exceeding five orders of wavelength. The study highlights that even minor fabrication imperfections can result in a significant change in the GH shift, which can serve as a means for detecting manufacturing defects. Furthermore, an ultrasensitive environmental refractive index sensor based on the enhanced GH shift by an isolated BIC is proposed.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Optics
Jie Yang, Sheng Long, Hanyu Wang, Zhide Yu, Biao Yang, Qinghua Guo, Yuanjiang Xiang, Lingbo Xia, Shuang Zhang
Summary: In this study, the coexistence of Dirac points and nodal chain degeneracies in a judiciously designed photonic metacrystal is proposed. The designed metacrystal exhibits nodal line degeneracies lying in perpendicular planes, which are chained together at the Brillouin zone boundary. Interestingly, the Dirac points, which are protected by nonsymmorphic symmetries, are located right at the intersection points of nodal chains. The nontrivial Z2 topology of the Dirac points is revealed by the surface states. The Dirac points and nodal chains are located in a clean frequency range. Our results provide a platform for studying the connection between different topological phases.
Article
Optics
Youquan Deng, Rongbin She, Wenquan Liu, Yuanfu Lu, Guangyuan Li
Summary: In response to the lack of cost-effective multipixel terahertz cameras, terahertz single-pixel imaging has emerged as an alternative solution. This technique illuminates the object with spatial light patterns and records using a single-pixel detector for each pattern. By utilizing physically enhanced deep learning networks, high-efficiency terahertz single-pixel imaging is achieved, enabling the reconstruction of high-quality images with a significantly reduced number of measurements.
Article
Optics
Weipeng Hu, Chao Liu, Xiaoyu Dai, Shuangchun Wen, Yuanjiang Xiang
Summary: This study proposes a method for achieving optimal second harmonic generation (SHG) in a topological cavity by matching the phase distributions of the electric fields of the topological corner state (TCS) and topological edge state (TES). The results show that the intrinsic efficiency can be improved when the phase distributions of the fundamental wave within the TCS and the second harmonic wave within the TES have the same symmetry. With this method, an optimal intrinsic efficiency of 0.165% was achieved.
Article
Optics
Sheng Long, Jie Yang, Hanyu Wang, Zhide Yu, Biao Yang, Qinghua Guo, Yuanjiang Xiang, Lingbo Xia, Shuang Zhang
Summary: In this study, a photonic Dirac-Weyl semimetal is proposed by introducing screw rotation symmetries into a spatial inversion symmetry-lacking system. A realistic metacrystal structure is designed for experimental consideration. The screw rotation symmetries are crucial for the existence of Dirac points, whose Z2 topology is revealed by the (010) surface states. Meanwhile, two pairs of ideal Weyl points at the same frequency are protected by D2d point group symmetries. The Dirac points and Weyl points reside in a clean frequency interval. The proposed photonic Dirac-Weyl semimetal provides a versatile platform for exploring the interaction between Dirac and Weyl semimetals and exploiting possible photonic topological devices.
Article
Optics
Yuexin Zhang, Xiaoyu Dai, Yuanjiang Xiang
Summary: This paper proposes a photonic higher-order topological insulator with a simple multilayer structure. By inserting a metallic pillar, the three-dimensional bandgap is extended, allowing for distinguishable topological modes. The lattice is reconfigurable, and introducing geometrical defects supports vertical disclination states.
LASER & PHOTONICS REVIEWS
(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
Optics
Jipeng Wu, Rongzhou Zeng, Jiaojiao Liang, Di Huang, Xiaoyu Dai, Yuanjiang Xiang
Summary: In this study, a one-dimensional photonic crystal Fabry-Perot cavity containing a multi-Weyl semimetal (mWSM) defect is proposed to investigate spin-dependent perfect absorption. By adjusting different parameters, the perfect absorption wavelength of different spin waves can be conveniently controlled. These studies provide simple and effective approaches to acquire spin-dependent and adjustable perfect absorption.
Article
Engineering, Electrical & Electronic
Changyou Luo, Yongqiang Kang, Xiaoyu Dai, Yuanjiang Xiang
Summary: In this paper, a cavity containing a unique medium is proposed to enhance the Goos-Hanchen shifts of light beams. The Goos-Hanchen shifts can be controlled by adjusting the intensity and detuning of the coherent control field, without modifying the material and structure of the dielectric interface. This work has significant potential for applications in optical devices, optical-beam steering and alignment, optical sensors, and optical switches.
IEEE PHOTONICS JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Qijun Ma, Xue Chen, Qisen Xiong, Leyong Jiang, Yuanjiang Xiang
Summary: The nonreciprocal surface modes in Weyl semimetal and the nonreciprocal photon occupation number on a graphene surface can be used to manipulate the nonreciprocal near-field energy transfer. In this study, the researchers investigated the near-field radiative heat flux transfer between a graphene heterostructure supported by a magnetic WSM and a twist-Weyl semimetal (T-WSM). They found that the transfer of near-field radiative heat flux can be caused by nonequilibrium fluctuations induced by drift currents. Furthermore, the interaction between nonreciprocal surface modes and the nonreciprocal photon occupation number in graphene allows for flexible manipulation of the near-field heat flux size and direction.
Article
Engineering, Electrical & Electronic
Jie Tang, Yuanjiang Xiang
Summary: This study systematically investigates the nonlinear optical response of indium selenide nanosheets and demonstrates their potential and application value in nanophotonic devices by creating logical gates and nonlinear isolators based on them.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
