Article
Multidisciplinary Sciences
Peiwen Liu, Chris Eckberg, Lei Pan, Peng Zhang, Kang L. Wang, Gunter Lupke
Summary: This study observes the phenomena of photo-induced magnetization dynamics in a magnetically doped topological insulator/antiferromagnet heterostructure, achieving a significantly enhanced perpendicular magnetic anisotropy.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Physical
Chi Zhang, Guochao Lu, Yao Zhang, Zhishan Fang, Haiping He, Haiming Zhu
Summary: This study reports 3D/2D perovskite/TMD type II heterostructures, which effectively enhance the light absorption and photocarrier lifetime of monolayer semiconductors by coupling solution processed CsPbBr3 film with MoS2 and WS2 monolayers.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Faizan Ahmad, Rachana Kumar, Sunil Singh Kushvaha, Mahesh Kumar, Pramod Kumar
Summary: This study analyzed the n-GaN/p-Bi2Se3 topological heterojunction using Raman spectroscopy and ultrafast transient absorption spectroscopy, exploring the surface states, energy levels, charge transfer, and carrier relaxation processes. Electrical measurements were also conducted to investigate the influence of interface states on the electrical and optical performance.
NPJ 2D MATERIALS AND APPLICATIONS
(2022)
Article
Chemistry, Physical
Prince Sharma, Archit Bhardwaj, Rahul Sharma, V. P. S. Awana, Tharangattu N. Narayanan, Karthik V. Raman, Mahesh Kumar
Summary: In this research, bismuth selenide thin films of various thicknesses were grown using molecular beam epitaxy, and a comprehensive study was conducted using reflectance spectroscopy and transient reflectance ultrafast spectroscopy, highlighting that the resonant feature in 10 nm films depends on the probe-and pump-dependent effects.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Minggang Xie, Chunguang Li, Siqi Zhang, Zhe Zhang, Yuxin Li, Xiao-Bo Chen, Zhan Shi, Shouhua Feng
Summary: The development of fast charging materials is crucial for large-scale and sustainable energy storage. This study presents a novel Bi2Se3-ZnSe heterostructure as an excellent fast charging material for Na+ storage. The introduction of ultrathin Bi2Se3 nanoplates with topological insulator metallic surfaces greatly reduces charge transfer resistance and improves overall electrical conductivity. The composite exhibits excellent high-rate performance and electrochemical stability, making it a promising alternative for further exploration of topological insulators and advanced heterostructures.
Article
Chemistry, Inorganic & Nuclear
Yu Zhong, Yue-E Huang, Tao Deng, Yi-Tong Lin, Xiao-Ying Huang, Zhong-Hua Deng, Ke-Zhao Du
Summary: In this study, Bi3+/Te4+ co-doped Cs2SnCl6 with dual emission spectrum was successfully prepared using a modified solution method, leading to adjustable emission color and intensity ratio. The energy transfer distance and efficiency between the two dopants were investigated, and a single-phase white light-emitting diode was fabricated, enriching the research on composition engineering in halide perovskites.
INORGANIC CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
J. Reimann, K. Sumida, M. Kakoki, K. A. Kokh, O. E. Tereshchenko, A. Kimura, J. Guedde, U. Hoefer
Summary: We investigated the ultrafast population dynamics of Sb2Te3 in two-dimensional momentum space using time-and angle-resolved two-photon photoemission spectroscopy. By using linearly polarized mid-infrared pump pulses, we were able to directly excite the material across the Dirac point. Our experiments revealed a strong enhancement of this resonant excitation within the Dirac cone along three specific directions, resulting in a macroscopic photocurrent when the plane of incidence is aligned in a certain direction. We also demonstrated that doping the Sb2Te3 with vanadium atoms significantly enhances inelastic electron scattering while having minimal impact on elastic scattering near the Dirac cone.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Multidisciplinary
Chaochao Qin, Jie Li, Jian Song, Shuhong Ma, Jicai Zhang, Guangrui Jia, Zhaoyong Jiao, Zunlue Zhu, Yuhai Jiang, Zhongpo Zhou
Summary: This study investigates the effect of donor sizes on energy transfer from perovskite nanocrystals to chromophore molecules. Both single energy transfer and triplet transfer mechanisms have been observed between CsPbBr3 quantum dots and Rhodamine B dye. The ability to adjust optical properties via particle-size controlling provides a unique platform for perovskite-chromophore hybrid systems.
RESULTS IN PHYSICS
(2023)
Article
Chemistry, Physical
Anisha Mohapatra, Neha Singh, Anupriya Singh, Chun-Yen Lee, Yu-Jung Lu, Yu-Tai Tao, Chih-Hao Lee, Chih Wei Chu
Summary: The study successfully achieved printing of perovskite films using grafting-assisted PDMS modification technique, demonstrating outstanding optoelectronic performance. This technique overcame the issue of fast hydrophobicity gain in current PDMS surface modification processes, offering a promising avenue for fabricating large-area solution-processable perovskite/perovskite heterostructures.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Daniel A. Bonilla, Jorge David Castano-Yepes, A. Martin-Ruiz, Enrique Munoz
Summary: In this research, the electromagnetic coupling of a heterostructure made of a topological insulator and a single graphene layer with ionized impurities is studied. The topological effects of the magnetoelectric polarizability of the topological insulator and its relative dielectric permittivity are explored on the electrical conductivity of graphene at low temperatures.
Article
Engineering, Electrical & Electronic
Takumi Sato, Katsuaki Sugawara, Takemi Kato, Yuki Nakata, Seigo Souma, Kunihiko Yamauchi, Tamio Oguchi, Takashi Takahashi, Takafumi Sato
Summary: By fabricating TI/TI heterostructures, a method free from introducing crystal impurities through chemical substitution can be implemented, and the evolution of band structures can be observed by angle-resolved photoemission spectroscopy, thus manipulating Dirac fermions in TIs.
ACS APPLIED ELECTRONIC MATERIALS
(2021)
Article
Physics, Multidisciplinary
Yuxin Liu, Xuefan Niu, Rencong Zhang, Qinghua Zhang, Jing Teng, Yongqing Li
Summary: An experimental study of electron transport properties of MnSe/(Bi,Sb)(2)Te-3 heterostructures was conducted, showing a strong magnetic proximity effect on the Hall effect and longitudinal resistances. The gate voltage was found to significantly modify the anomalous Hall conductance, indicating that heterostructures based on antiferromagnetic insulators provide a promising platform for investigating a wide range of topological spintronic phenomena.
CHINESE PHYSICS LETTERS
(2021)
Article
Physics, Multidisciplinary
Oliver J. Clark, Friedrich Freyse, Irene Aguilera, Alexander S. Frolov, Andrey M. Ionov, Sergey I. Bozhko, Lada V. Yashina, Jaime Sanchez-Barriga
Summary: The study investigates the ultrafast response of the Sb(111) spin-polarized surface state to femtosecond-laser excitation, revealing a giant mass enhancement and a kink structure above the Fermi level in its energy-momentum dispersion. The kink structure, arising from the direct coupling of the surface state to the bulk continuum, shows a significant abrupt change in group velocity. Experimental verification of the topological nature of the surface state is achieved, with implications for future applications in ultrafast spintronics.
COMMUNICATIONS PHYSICS
(2021)
Article
Chemistry, Physical
Ping Li, Xue-Song Zhou, Zhi-Xin Guo
Summary: This study proposes a method to efficiently control 2D magnets with a small electric field in a multiferroic heterostructure. The feasibility of this strategy is demonstrated in the bilayer CrI3/BiFeO3(001) heterostructure using first-principles calculations. The heterostructure exhibits strong magnetoelectric coupling, allowing efficient switching between ferromagnetic and antiferromagnetic states of the bilayer CrI3 by the polarized states of BiFeO3(001).
NPJ COMPUTATIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Heng Zhang, Elke Debroye, Shuai Fu, Miriam C. Rodriguez Gonzalez, Indy du Fosse, Jaco J. Geuchies, Lei Gao, Xiaoqing Yu, Arjan J. Houtepen, Steven De Feyter, Johan Hofkens, Mischa Bonn, Hai I. Wang
Summary: It is reported that hole-transfer processes dominate the ultrafast charge transfer across strongly coupled double-perovskite Cs2AgBiBr6/graphene (DP/Gr) heterostructures following optical excitation. The transfer direction and efficiency of the holes depend on the excitation wavelength. Low-energy excitation allows photoexcited hot holes in Gr to inject into in-gap defect states in DPs, while above-bandgap excitation reverses the hole-transfer direction, leading to hole transfer from the valence band of DPs to Gr. Increasing the excitation photon energy enhances the charge transfer efficiency, revealing the positive role of excess energy in interfacial charge transfer.
ADVANCED MATERIALS
(2023)
Article
Optics
Wenyou Gou, Jianghua Zhang, Zhuohang Zhang, Xiangai Cheng, Tian Jiang
Summary: This paper investigates a microwave photonics scanning channelizer with digital image-reject mixing and linearization, utilizing a cascaded distributed feedback semiconductor laser (DFB) operating at stable locking dynamics with flat optical frequency comb (OFC) injection. The proposed channelizer offers high-quality coherent optical local oscillator with ultra-broadband tuning capability by demultiplexing and amplifying individual comb from densely spaced OFC. It also employs digital Hartley structure image-reject mixing (IRM) and digital linearization technique to compensate for amplitude and phase imbalances, resulting in high image rejection ratio (IRR) and improved spurious free dynamic range (SFDR).
OPTICS COMMUNICATIONS
(2023)
Article
Optics
D. E. N. G. H. U. Song, K. E. Yin, R. U. N. L. I. N. Miao, C. H. E. N. X. Zhang, Z. H. O. N. G. J. I. E. Xu, T. I. A. N. Jiang
Summary: In this paper, the characteristics of dispersion-managed, polarization-maintaining (PM) 1-GHz mode-locked fiber lasers were investigated both experimentally and numerically. Three compact and robust 1-GHz fiber lasers operating at different dispersion regimes were demonstrated. The long-term stability of the lasers without external control was also proved. A numerical model was constructed to analyze the mode-locking dynamics, and pulse evolution simulations were carried out, showing agreement with experimental results.
Article
Optics
Jun Zhang, Qiuquan Yan, Hengzhu Liu, Yuhua Tang, Tong Zhou, Tian Jiang
Summary: Optical neural networks utilize optical neurons to achieve complex functions. The proposed deep reinforcement coherent optical neuron control (DRCON) method improves convergence rate and effective number of bits, showing promise for large-scale optical neural network control.
Article
Chemistry, Multidisciplinary
Yuze Hu, Mingyu Tong, Siyang Hu, Weibao He, Xiang'ai Cheng, Tian Jiang
Summary: By using theoretical analysis, numerical simulation, and experimental realization, an achromatic Fano metasurface with high contrast, broadband response, and ultrafast switching rate is successfully achieved. The physics of inter-mode coupling is developed to design the Fano metasurface based on a complete phase diagram. Unlike conventional Fano metasurfaces, the cross-polarized inter-metaatoms coupling is discovered as a superior ability for high-efficiency broadband achromatic polarization conversion.
Article
Engineering, Electrical & Electronic
Wenyou Gou, Jianghua Zhang, Zhuohang Zhang, Wei Dong, Xiangai Cheng, Tian Jiang
Summary: This article experimentally demonstrates a photonic microwave signals generation scheme for background-free phase-coded (PC) radar pulse with multioctave tuning. An optical frequency comb (OFC) demultiplexing technology based on optical injection locking (OIL) provides a power-equalized coherent optical local oscillator (LO) with ultra-broadband tuning capability. The scheme features a flat frequency response over an ultra-wideband frequency range without needing a broadband modulator and radio frequency (RF) synthesizer. A proof-of-concept experiment shows that the power fluctuation of 0.5 Gbps background-free PC pulses is lower than 3.12 dB within 3 similar to 24 GHz carrier frequency. The pulse compression performance and system stability are also investigated.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Suyiming Luo, Haolin Ding, Shihe Yi, Lin He, Tian Jiang
Summary: With the increase of flight speed, aero-optical effects induced by the turbulent boundary layer near the optical window become increasingly significant. The influence of the optical aperture size on the aero-optical effects of supersonic (Mach 3.0) turbulent boundary layer (SPTBL) was studied, and the underlying mechanisms were analyzed. The results showed that the optical aperture size affects the beam jitter, beam offset, and beam spread, which are caused by turbulent structures of different scales.
Article
Chemistry, Physical
Yan Kang, Yabo Chen, Yinlong Tan, Hao Hao, Cheng Li, Xiangnan Xie, Weihong Hua, Tian Jiang
Summary: Activation of artificial synapses through Sn intercalation in a-MoO3 allows for efficient response to light stimuli and persistent photoconductivity. The resulting Sn-MoO3 device exhibits high paired pulse facilitation and tunable synaptic plasticity, showing great potential for neuromorphic computing. The extensible artificial neural network (ANN) based on Sn-MoO3 synapses demonstrates superior performance in pattern recognition.
JOURNAL OF MATERIOMICS
(2023)
Article
Engineering, Electrical & Electronic
Yin Li, Qiaosong Cai, Jie Yang, Tong Zhou, Yuanxi Peng, Tian Jiang
Summary: We propose and demonstrate a deep learning-assisted photonic approach for high-precision angle-of-arrival (AOA) measurement suitable for long-baseline direction finding. The system utilizes a non-uniform linear array and a dual-drive Mach Zehnder modulator for AOA-to-Voltage mapping. A deep neural network with long-short term memory is then employed for post-processing to improve AOA estimation performance.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
Ke Wei, Qirui Liu, Yuxiang Tang, Yingqian Ye, Zhongjie Xu, Tian Jiang
Summary: Controlling light-matter interaction at micro- and nano-scale is important for modern optics and optoelectronics. The study explores a new cooperative coupling between plasmon and different excitonic complexes in WS2-silver nanocavities, resulting in the creation of plasmon-excitontrion-charged biexciton four coupling states. The demonstration of the charged biexciton polariton showcases high nonlinearity and potential for energy-efficient optical switching and information processing.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Wenyou Gou, Xin Zhang, Wei Dong, Zhuohang Zhang, Taolin Liu, Jianghua Zhang, Tian Jiang
Summary: In this article, a photonic multiformat microwave signal generator with immunity to chromatic dispersion-induced power fading is proposed and demonstrated. The system utilizes a dual-parallel Mach-Zehnder modulator driven by a baseband signal to perform multiformat modulation of the optical signal. An active demultiplexer based on optical injection locking is used to filter and amplify individual comb lines from the optical frequency comb, generating the microwave signal. The system features an ultra-wideband frequency tuning range and eliminates the need for a broadband modulator and RF synthesizer. The proof-of-concept experiment successfully generates multiformat waveforms and eliminates CDIP in long-range transmission.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Chemistry, Multidisciplinary
Bo Tian, Jingyao Jiang, Zebo Zheng, Ximiao Wang, Shaojing Liu, Wuchao Huang, Tian Jiang, Huanjun Chen, Shaozhi Deng
Summary: Optical skyrmions have been successfully demonstrated using different field vectors, but the study of their generation, control, and correlation with electromagnetic fields is still in its infancy. In this study, we propose that evanescent TM-polarized EM fields with rotational symmetry are actually Neel-type optical target skyrmions of electric field vectors. Our proposal was verified by numerical simulations and real-space nano-imaging experiments on a graphene monolayer, showing that the target skyrmions can be as small as & SIM;100 nm in diameter. These findings not only increase our understanding of the formation mechanisms of EM topological textures, but also provide guidelines for constructing EM skyrmions with potential impacts on future information technologies.
Article
Optics
Yihao Luo, Jun Zhang, Shiyin Du, Qiuquan Yan, Zeyu Zhao, Zilong Tao, Tong Zhou, Tian Jiang
Summary: This article introduces the importance of material design and fiber beams, as well as the application of deep learning algorithms in material design. Through deep learning algorithms, the performance and response of materials can be effectively simulated, achieving efficient material design.
CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG
(2023)
Article
Optics
Liu Qirui, Tang Yuxiang, Wei Ke, Jiang Tian
Summary: This paper reviews the progress in the field of magneto-optical research on antiferromagnets. The interactions between laser and two-dimensional antiferromagnets are discussed, including the macroscopic magneto-optical effect and microscopic elementary excitation quasiparticle. The properties and characteristics of typical van der Waals antiferromagnets are introduced, and various magneto-optical effects and their applications in antiferromagnetic materials are discussed. The prospects for further research and the application of two-dimensional antiferromagnets in magneto-optical and related fields are summarized.
CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG
(2023)
Article
Automation & Control Systems
Jun Zhang, Zilong Tao, Qiuquan Yan, Shiyin Du, Yuhua Tang, Hengzhu Liu, Ke Wei, Tong Zhou, Tian Jiang
Summary: This study aims to demonstrate that hardware can inspire algorithm design for photonic convolutional neural networks. The authors developed a dual optical frequency comb neuron (DOFCN) architecture to perform nonlinear activation and vector convolution without dispersion and large-scale modulator arrays. The proposed DOFCN-based composite vector convolutional neural networks (CVCNNs) showed improved classification accuracy and regression residuals compared to standard CNN.
ADVANCED INTELLIGENT SYSTEMS
(2023)
Article
Optics
Denghui Song, Ke Yin, Runlin Miao, Chenxi Zhang, Zhongjie Xu, Tian Jiang
Summary: This paper investigates the characteristics of dispersion-managed, polarization-maintaining 1-GHz mode-locked fiber lasers both experimentally and numerically. Three compact and robust 1-GHz fiber lasers operating at different dispersion regimes were demonstrated. The net dispersion of the cavity is adjusted by changing the types of PM erbium-doped fibers and SESAMs. The long-term stability of the lasers is proved without external control.
