2024

• Record 265 of
  
  Title:Single-photon ranging lidar based on multi-repetition-rate pulse train correlation and accumulation
  
  Author Full Names:Kang, Yan; Wang, Xiaofang; Zhang, Tongyi; Zhao, Wei

  Source Title:OPTICS LETTERS

  Language:English

  Document Type:Letter

  Keywords Plus:LASER; IMAGER

  Abstract:A single-photon lidar based on multi-repetition-rate pulse train correlation and accumulation is proposed, and a ranging experiment is conducted on a 32 m target. By accumulating the correlation ranging results of pulse trains with internal spacings of 80, 100, and 125 ns, the signal-to-noise ratio of the cross correlation function is improved by about three-fold, which enables our method to improve the ranging precisions by more than 20% compared with the single repetition-rate method, and the shorter the acquisition time, the more obvious the advantage will be. Experimental results show that at an acquisition time of 0.01 s, our method can still achieve a ranging precision of 2.59 cm, while the single repetition-rate method can no longer obtain effective ranging results at this time. This method will be of great significance for realizing high -speed, large-scale unambiguous single-photon lidar ranging. (c) 2024 Optica Publishing Group

  Addresses:[Kang, Yan; Wang, Xiaofang; Zhang, Tongyi; Zhao, Wei] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Wang, Xiaofang; Zhang, Tongyi; Zhao, Wei] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

  Affiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; State Key Laboratory of Transient Optics & Photonics; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS

  Publication Year:2024

  Volume:49

  Issue:6

  Start Page:1628

  End Page:1631

  DOI Link:http://dx.doi.org/10.1364/OL.511411

  数据库ID（收录号）:WOS:001224109400008
• Record 266 of
  
  Title:Stable Ultrashort Pulse Generation Using a Coiled and Tapered Few-Mode-Fiber Polarization Controller as a Saturable Absorber
  
  Author Full Names:Zhao, F. Y.; Hu, X. H.; Zou, F. M.; Zhang, T.; Wang, Y. S.; Lan, J. Q.

  Source Title:JOURNAL OF RUSSIAN LASER RESEARCH

  Language:English

  Document Type:Article

  Keywords Plus:NONLINEAR MULTIMODAL INTERFERENCE; HYBRID STRUCTURE; LASER; WAVELENGTH; SOLITON; DISPERSION; GRAPHENE

  Abstract:We present a coiled and tapered graded-index few-mode-fiber (FMF) polarization controller (PC) as a saturable absorber (SA) in an all-fiber laser. We obtain the 845 fs ultrashort pulse with a signal-to-noise ratio (SNR) of 65 dB, using a tapered graded-index FMF of 40 cm in the cavity. The spectrum is centered at 1588.2 nm with a 3 dB spectral bandwidth of 4.04 nm. Furthermore, a Q-switched mode-locked state is observed between 140 and 360 mW of the pump power in the cavity. The results further demonstrate the application of a coiled and tapered graded-index FMF PC as a SA for stable high-energy ultrashort pulse formation and provide a technical method for generating ultrashort pulses.

  Addresses:[Zhao, F. Y.; Zou, F. M.; Lan, J. Q.] Fujian Univ Technol, Sch Elect Elect Engn & Phys, Fuzhou 350118, Fujian, Peoples R China; [Hu, X. H.; Zhang, T.; Wang, Y. S.] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China

  Affiliations:Fujian University of Technology; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; State Key Laboratory of Transient Optics & Photonics

  Publication Year:2024

  Volume:45

  Issue:1

  Start Page:66

  End Page:73

  DOI Link:http://dx.doi.org/10.1007/s10946-024-10189-3

  数据库ID（收录号）:WOS:001185828000001
• Record 267 of
  
  Title:Ultralow-Noise K-Band Soliton Microwave Oscillator Using Optical Frequency Division
  
  Author Full Names:Niu, Rui; Hua, Tian-Peng; Shen, Zhen; Wang, Yu; Wan, Shuai; Sun, Yu Robert; Wang, Weiqiang; Zhao, Wei; Guo, Guang-Can; Zhang, Wenfu; Liu, Wen; Hu, Shui-Ming; Dong, Chun-Hua

  Source Title:ACS PHOTONICS

  Language:English

  Document Type:Article

  Keywords Plus:PHASE NOISE; TRANSMISSION; GENERATION; CRYSTALS; SYSTEM

  Abstract:Compact, low-noise microwave oscillators are required throughout a wide range of applications such as radar systems, wireless networks, and frequency metrology. Optical frequency division via an optical frequency comb provides a powerful tool for low-noise microwave signal generation. Here, we experimentally demonstrate an optical reference down to 26 GHz frequency division based on the dissipative Kerr soliton comb, which is generated on a CMOS-compatible, high-index doped silica glass platform. The optical reference is generated through two continuous wave lasers locked to an ultralow expansion cavity. The dissipative Kerr soliton comb with a repetition rate of 26 GHz acts as a frequency divider to derive an ultralow-noise microwave oscillator, with a phase noise level of -101.3 dBc/Hz at a 100 Hz offset frequency and -132.4 dBc/Hz at a 10 kHz offset frequency. Furthermore, the Allan deviation of the oscillator reaches 6.4 x 10(-13) at a 1 s measurement time. Our system is expected to provide an ultralow-noise microwave oscillator for future radar systems and the next generation of wireless networks.

  Addresses:[Niu, Rui; Shen, Zhen; Wang, Yu; Wan, Shuai; Guo, Guang-Can; Dong, Chun-Hua] Univ Sci & Technol China, CAS Key Lab Quantum Informat, Hefei 230026, Peoples R China; [Niu, Rui; Hua, Tian-Peng; Shen, Zhen; Wang, Yu; Wan, Shuai; Sun, Yu Robert; Guo, Guang-Can; Hu, Shui-Ming; Dong, Chun-Hua] Univ Sci & Technol China, CAS Ctr Excellence Quantum Informat & Quantum Phys, Hefei 230088, Peoples R China; [Niu, Rui; Shen, Zhen; Wang, Yu; Wan, Shuai; Guo, Guang-Can; Hu, Shui-Ming; Dong, Chun-Hua] Univ Sci & Technol China, Hefei Natl Lab, Hefei 230088, Anhui, Peoples R China; [Hua, Tian-Peng; Sun, Yu Robert; Hu, Shui-Ming] Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Peoples R China; [Wang, Weiqiang; Zhao, Wei; Zhang, Wenfu] Xian Inst Opt & Precis Mech CAS, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China; [Wang, Weiqiang; Zhao, Wei; Zhang, Wenfu] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Liu, Wen] Univ Sci & Technol China, Dept Opt & Opt Engn, Hefei 230026, Peoples R China

  Affiliations:Chinese Academy of Sciences; University of Science & Technology of China, CAS; CAS Center for Excellence in Quantum Information & Quantum Physics; Chinese Academy of Sciences; University of Science & Technology of China, CAS; CAS Center for Excellence in Quantum Information & Quantum Physics; Chinese Academy of Sciences; University of Science & Technology of China, CAS; Hefei National Laboratory; Chinese Academy of Sciences; University of Science & Technology of China, CAS; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; State Key Laboratory of Transient Optics & Photonics; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Chinese Academy of Sciences; University of Science & Technology of China, CAS

  Publication Year:2024

  Volume:11

  Issue:4

  Start Page:1412

  End Page:1418

  DOI Link:http://dx.doi.org/10.1021/acsphotonics.3c01247

  数据库ID（收录号）:WOS:001185178500001
• Record 268 of
  
  Title:Domain Adaptation of Anchor-Free object detection for urban traffic
  
  Author Full Names:Yu, Xiaoyong; Lu, Xiaoqiang

  Source Title:NEUROCOMPUTING

  Language:English

  Document Type:Article

  Abstract:Modern detectors are mostly trained under single and limited conditions. However, object detection faces various complex and open situations in autonomous driving, especially in urban street scenes with dense objects and complex backgrounds. Due to the shift in data distribution, modern detectors cannot perform well in actual urban environments. Using domain adaptation to improve detection performance is one of the key methods to extend object detection from limited situations to open situations. To this end, this article proposes a Domain Adaptation of Anchor -Free object detection (DAAF) for urban traffic. DAAF is a crossdomain object detection method that performs feature alignment including two aspects. On the one hand, we designed a fully convolutional adversarial training method for global feature alignment at the image level. Meanwhile, images can generally be decomposed into structural information and texture information. In urban street scenes, the structural information of images is generally similar. The main difference between the source domain and the target domain is texture information. Therefore, during global feature alignment, this paper proposes a method called texture information limitation (TIL). On the other hand, in order to solve the problem of variable aspect ratios of objects in urban street scenes, this article uses an anchor -free detector as the baseline detector. Since the anchor -free object detector can obtain neither explicit nor implicit instance -level features, we adopt Pixel -Level Adaptation (PLA) to align local features instead of instance -level alignment for local features. The size of the object has the greatest impact on the final detection effect, and the object scale in urban scenes is relatively rich. Guided by the differentiation of attention mechanisms, a multi -level adversarial network is designed to perform feature alignment of the output space at different feature levels called Scale Information Limitation (SIL). We conducted cross -domain detection experiments by using various urban streetscape autonomous driving object detection datasets, including adverse weather conditions, synthetic data to real data, and cross -camera adaptation. The experimental results indicate that the method proposed in this article is effective.

  Addresses:[Yu, Xiaoyong] Chinese Acad Sci, Key Lab Spectral Imaging Technol CAS, Xian Inst Opt & Precis Mech, Xian 710119, Shaanxi, Peoples R China; [Yu, Xiaoyong] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Lu, Xiaoqiang] Fuzhou Univ, Coll Phys & Informat Engn, Fuzhou 350108, Peoples R China

  Affiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Fuzhou University

  Publication Year:2024

  Volume:582

  Article Number:127477

  DOI Link:http://dx.doi.org/10.1016/j.neucom.2024.127477

  数据库ID（收录号）:WOS:001221620100001
• Record 269 of
  
  Title:Monolithic PMN-39PT nanograting-assisted second harmonic generation enhancement
  
  Author Full Names:Li, Tianlun; Liu, Xin; Lu, Yang; Gao, Duorui; Zhang, Kai; Gan, Xuetao; Wei, Xiaoyong; Xu, Zhuo; Zhang, Lei

  Source Title:OPTICS EXPRESS

  Language:English

  Document Type:Article

  Keywords Plus:WAVE-GUIDES

  Abstract:Second harmonic generation plays a vital role in frequency conversion which mutually promotes the laser technology and allows the wavebands extension of new coherent source. The monolithic crystals are supposed to be a superior choice for harmonic generation due to long interaction distance, however, the phase-mismatch brought a sharp reduction in the conversion efficiency. Although birefringent phase-matching and quasi-phase-matching techniques are commonly utilized to fill the phase gap in monolithic crystals, these techniques are limited by the natural refractive index of crystal and the domain engineering, respectively. In recent years, subwavelength structures evolve as a flexible scheme to realize phase matching by engineering the geometry features of crystals. Here, structured nanogratings are designed and fabricated on a monolithic PMN-39PT (Pb(Mg1/3Nb2/3)O3-0.39PbTiO3) substrate, a novel ferroelectric crystal with promising optical prospect, for enhancing second harmonic generation, where birefringent or quasi phase-matching is hard to achieve. The nanograting-assisted second harmonic generation enhancement is observed which is not limited by the availability of thin crystalline films. Meanwhile, a boost in the second harmonic signal synchronously promotes the cascading third harmonic generation. This method may provide an alternative solution for enhanced harmonic generation on monolithic substrates and develop potential nonlinear optical materials for frequency conversion.

  Addresses:[Li, Tianlun; Gan, Xuetao] Northwestern Polytech Univ, Sch Microelect, Xian 710072, Peoples R China; [Liu, Xin; Gan, Xuetao; Wei, Xiaoyong; Xu, Zhuo; Zhang, Lei] Xi An Jiao Tong Univ, Key Lab Phys Elect Devices, Minist Educ, Xian 710049, Peoples R China; [Liu, Xin; Wei, Xiaoyong; Xu, Zhuo; Zhang, Lei] Xi An Jiao Tong Univ, Sch Elect Sci & Engn, Shaanxi Key Lab Informat Photon Tech, Xian 710049, Peoples R China; [Lu, Yang] Chinese Acad Sci, CAS Key Lab Nanophoton Mat & Devices, Suzhou 215123, Peoples R China; [Lu, Yang] Chinese Acad Sci, Suzhou Inst Nanotech & Nanob SINANO, Key Lab Nanodevices & Applicat, I Lab, Suzhou 215123, Peoples R China; [Gao, Duorui] Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, CAS, Xian 710119, Peoples R China

  Affiliations:Northwestern Polytechnical University; Xi'an Jiaotong University; Xi'an Jiaotong University; Chinese Academy of Sciences; Chinese Academy of Sciences; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; State Key Laboratory of Transient Optics & Photonics

  Publication Year:2024

  Volume:32

  Issue:6

  Start Page:9237

  End Page:9244

  DOI Link:http://dx.doi.org/10.1364/OE.510869

  数据库ID（收录号）:WOS:001208347200006
• Record 270 of
  
  Title:Theoretical derivation and application of empirical Harvey scatter model
  
  Author Full Names:Ma, Zhanpeng; Wang, Hu; Chen, Qinfang; Xue, Yaoke; Yan, Haoyu; Liu, Jiawen

  Source Title:OPTICS EXPRESS

  Language:English

  Document Type:Article

  Keywords Plus:LIGHT-SCATTERING; SURFACES

  Abstract:Starting from the Rayleigh -Rice perturbation theory, this paper derives the empirical Harvey scatter model and ABg scatter model applied extensively in optical analysis software packages and verifies the shift -invariant behavior of the scattered radiance in direction cosine space. Using data obtained from multi -wavelength laser scatterometer on carbon nanotube black coating and pineblack coating, we establish the polynomial model based on the sine of the scattering angle plus the sine of the specular reflection angle, i.e., sin 0s+sin 00 and the dual -Harvey model based on sin 0s -sin 00 , respectively. The models are in good accordance with the experimental data and further extend the valid range of empirical models. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

  Addresses:[Ma, Zhanpeng; Wang, Hu; Chen, Qinfang; Xue, Yaoke; Yan, Haoyu; Liu, Jiawen] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Ma, Zhanpeng; Wang, Hu; Chen, Qinfang; Xue, Yaoke; Yan, Haoyu; Liu, Jiawen] Xian Space Sensor Opt Technol Engn Res Ctr, Xian 710119, Peoples R China; [Wang, Hu; Yan, Haoyu; Liu, Jiawen] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Xue, Yaoke] Beihang Univ, Beijing 100191, Peoples R China; [Xue, Yaoke] Chinese Acad Sci, Youth Innovat Promot Assoc, Beijing 100037, Peoples R China

  Affiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Beihang University; Chinese Academy of Sciences

  Publication Year:2024

  Volume:32

  Issue:6

  Start Page:8986

  End Page:8998

  DOI Link:http://dx.doi.org/10.1364/OE.519414

  数据库ID（收录号）:WOS:001208558300004
• Record 271 of
  
  Title:Generation of arbitrarily structured optical vortex arrays based on the epicycle model
  
  Author Full Names:Tai, Yuping; Fan, Haihao; Ma, Xin; Wei, Wenjun; Zhang, Hao; Tang, Miaomiao; Li, Xinzhong

  Source Title:OPTICS EXPRESS

  Language:English

  Document Type:Article

  Keywords Plus:LATTICES; VORTICES

  Abstract:Optical vortex arrays (OVAs) are complex light fields with versatile structures that have been widely studied in large-capacity optical communications, optical tweezers, and optical measurements. However, generating OVAs with arbitrary structures without explicit analytical expressions remains a challenge. To address this issue, we propose an alternative scheme for customizing OVAs with arbitrary structures using an epicycle model and vortex localization techniques. This method can accurately generate an OVA with an arbitrary structure by predesigning the positions of each vortex. The influence of the number and coordinates of the locating points on customized OVAs is discussed. Finally, the structures of the OVA and each vortex are individually shaped into specifically formed fractal shapes by combining cross-phase techniques. This unique OVA will open up novel potential applications, such as the complex manipulation of multiparticle systems and optical communication based on optical angular momentum.

  Addresses:[Tai, Yuping; Fan, Haihao; Ma, Xin; Wei, Wenjun; Zhang, Hao; Tang, Miaomiao; Li, Xinzhong] Henan Univ Sci & Technol, Sch Chem & Chem Engn, Luoyang 471023, Peoples R China; [Tai, Yuping; Fan, Haihao; Ma, Xin; Wei, Wenjun; Zhang, Hao; Tang, Miaomiao; Li, Xinzhong] Henan Univ Sci & Technol, Sch Phys & Engn, Luoyang 471023, Peoples R China; [Tai, Yuping; Li, Xinzhong] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China; [Li, Xinzhong] Prov & Ministerial Coconstruct Collaborat Innovat, Luoyang 471023, Peoples R China

  Affiliations:Henan University of Science & Technology; Henan University of Science & Technology; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; State Key Laboratory of Transient Optics & Photonics

  Publication Year:2024

  Volume:32

  Issue:6

  Start Page:10577

  End Page:10586

  DOI Link:http://dx.doi.org/10.1364/OE.521250

  数据库ID（收录号）:WOS:001207493700002
• Record 272 of
  
  Title:Optimal design of a gravitational wave telescope system for the suppression of stray light
  
  Author Full Names:Liang, Rong; Zhou, Xiaojun; Xu, Huangrong; Wu, Dengshan; Li, Chenxi; Yu, Weixing

  Source Title:APPLIED OPTICS

  Language:English

  Document Type:Article

  Keywords Plus:SPACE; MISSION

  Abstract:For gravitational wave detection, the telescope is required to have an ultra-low wavefront error and ultra -high signal-to-noise ratio, where the power of the stray light should be controlled on the order of less than 10 - 10 . In this work, we propose an alternative stray light suppression method for the optical design of an off-axis telescope with four mirrors by carefully considering the optimal optical paths. The method includes three steps. First, in the period of the optical design, the stray light caused by the tertiary mirror and the quaternary mirror is suppressed by increasing the angle formed by the optical axes of the tertiary mirror and the quaternary mirror and reducing the radius of curvature of the quaternary mirror as much as possible to make sure the optical system provides a beam quality with a wavefront error less than lambda/ 80. Next, the stray light could satisfy the requirement of the order of 10 - 10 when the level of roughness reaches 0.2 nm, and the pollution of mirrors is controlled at the level of CL100. Finally, traditional stray light suppression methods should also be applied to mechanics, including the use of the optical barrier, baffle tube, and black paint. It can be seen that the field stop can efficiently reduce stray light caused by the secondary mirror by more than 55% in the full field of view. The baffle tube mounted on the position of the exit pupil can reduce the overall stray light energy by 5%, and the difference between the ideal absorber (absorption coefficient is 100%) and the actual black paint (absorption coefficient is 90%) is 3.2%. These simulation results are confirmed by the Monte Carlo method for a stray light analysis. Based on the above results, one can conclude that the geometry structure of the optical design, the quality of mirrors, and the light barrier can greatly improve the stray light suppression ability of the optical system, which is vital when developing a gravitational wave telescope with ultra-low stray light energy. (c) 2024 Optica Publishing Group

  Addresses:[Liang, Rong; Zhou, Xiaojun; Xu, Huangrong; Wu, Dengshan; Li, Chenxi; Yu, Weixing] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Key Lab Spectral Imaging Technol, 17 Xinxi Rd, Xian 710119, Peoples R China; [Liang, Rong; Yu, Weixing] Univ Chinese Acad Sci, Ctr Mech Sci & Optoelect Engn, Beijing 100049, Peoples R China

  Affiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS

  Publication Year:2024

  Volume:63

  Issue:8

  Start Page:1995

  End Page:2003

  DOI Link:http://dx.doi.org/10.1364/AO.502610

  数据库ID（收录号）:WOS:001225880700003
• Record 273 of
  
  Title:High-performance reconstruction method combining total variation with a video denoiser for compressed ultrafast imaging
  
  Author Full Names:Pei, Chengquan; Li, David Day-Uei; Shen, Qian; Zhang, Shian; Qi, Dalong; Jin, Chengzhi; Dong, Le

  Source Title:APPLIED OPTICS

  Language:English

  Document Type:Article

  Keywords Plus:REGULARIZATION

  Abstract:Compressed ultrafast photography (CUP) is a novel two-dimensional (2D) imaging technique to capture ultrafast dynamic scenes. Effective image reconstruction is essential in CUP systems. However, existing reconstruction algorithms mostly rely on image priors and complex parameter spaces. Therefore, in general, they are time-consuming and result in poor imaging quality, which limits their practical applications. In this paper, we propose a novel reconstruction algorithm, to the best of our knowledge, named plug-in-plug-fast deep video denoising net-total variation (PnP-TV-FastDVDnet), which exploits an image's spatial features and correlation features in the temporal dimension. Therefore, it offers higher-quality images than those in previously reported methods. First, we built a forward mathematical model of the CUP, and the closed-form solution of the three suboptimization problems was derived according to plug-in and plug-out frames. Secondly, we used an advanced video denoising algorithm based on a neural network named FastDVDnet to solve the denoising problem. The peak signal-to-noise ratio (PSNR) and structural similarity index measure (SSIM) are improved on actual CUP data compared with traditional algorithms. On benchmark and real CUP datasets, the proposed method shows the comparable visual results while reducing the running time by 96% over state-of-the-art algorithms. (c) 2024 Optica Publishing Group

  Addresses:[Pei, Chengquan; Dong, Le] Xidian Univ, Xian 710119, Peoples R China; [Li, David Day-Uei] Univ Strathclyde, Fac Engn, Glasgow G4 0RE, Scotland; [Shen, Qian] Xian Inst Opt & Precis Mech, Chinese Acad Sci, Xian 710119, Peoples R China; [Zhang, Shian; Qi, Dalong; Jin, Chengzhi] East China Normal Univ, Sch Phys & Mat Sci, State Key Lab Precis Spect, 3663 North Zhongshan Rd, Shanghai 200062, Peoples R China

  Affiliations:Xidian University; University of Strathclyde; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; East China Normal University

  Publication Year:2024

  Volume:63

  Issue:8

  Start Page:C32

  End Page:C40

  DOI Link:http://dx.doi.org/10.1364/AO.506058

  数据库ID（收录号）:WOS:001225883100002
• Record 274 of
  
  Title:Infrared imaging of magnetic octupole domains in non-collinear antiferromagnets
  
  Author Full Names:Wang, Peng; Xia, Wei; Shen, Jinhui; Chen, Yulong; Peng, Wenzhi; Zhang, Jiachen; Pan, Haolin; Yu, Xuhao; Liu, Zheng; Gao, Yang; Niu, Qian; Xu, Zhian; Yang, Hongtao; Guo, Yanfeng; Hou, Dazhi

  Source Title:NATIONAL SCIENCE REVIEW

  Language:English

  Document Type:Article

  Keywords Plus:MAGNETORESISTANCE; WALLS; MN3SN

  Abstract:Magnetic structure plays a pivotal role in the functionality of antiferromagnets (AFMs), which not only can be employed to encode digital data but also yields novel phenomena. Despite its growing significance, visualizing the antiferromagnetic domain structure remains a challenge, particularly for non-collinear AFMs. Currently, the observation of magnetic domains in non-collinear antiferromagnetic materials is feasible only in Mn3Sn, underscoring the limitations of existing techniques that necessitate distinct methods for in-plane and out-of-plane magnetic domain imaging. In this study, we present a versatile method for imaging the antiferromagnetic domain structure in a series of non-collinear antiferromagnetic materials by utilizing the anomalous Ettingshausen effect (AEE), which resolves both the magnetic octupole moments parallel and perpendicular to the sample surface. Temperature modulation due to AEE originating from different magnetic domains is measured by lock-in thermography, revealing distinct behaviors of octupole domains in different antiferromagnets. This work delivers an efficient technique for the visualization of magnetic domains in non-collinear AFMs, which enables comprehensive study of the magnetization process at the microscopic level and paves the way for potential advancements in applications. Infrared imaging employing the anomalous Ettingshausen effect unveils magnetic domain structures in non-collinear antiferromagnets, unlocking new possibilities in spintronics and memory device development.

  Addresses:[Wang, Peng; Shen, Jinhui; Chen, Yulong; Peng, Wenzhi; Zhang, Jiachen; Pan, Haolin; Yu, Xuhao; Hou, Dazhi] Univ Sci & Technol China, Int Ctr Quantum Design Funct Mat ICQD, Hefei 230026, Peoples R China; [Wang, Peng] Qingdao Univ Sci & Technol, Coll Math & Phys, Qingdao 266061, Peoples R China; [Xia, Wei; Guo, Yanfeng] ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China; [Xia, Wei; Guo, Yanfeng] ShanghaiTech Univ, ShanghaiTech Lab Topol Phys, Shanghai 201210, Peoples R China; [Shen, Jinhui; Chen, Yulong; Peng, Wenzhi; Zhang, Jiachen; Pan, Haolin; Yu, Xuhao; Liu, Zheng; Gao, Yang; Niu, Qian; Hou, Dazhi] Univ Sci & Technol China, Dept Phys, Hefei 230026, Peoples R China; [Liu, Zheng; Gao, Yang; Niu, Qian] Univ Sci & Technol China, CAS Key Lab Strongly Coupled Quantum Matter Phys, Hefei 230026, Peoples R China; [Yang, Hongtao] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China

  Affiliations:Chinese Academy of Sciences; University of Science & Technology of China, CAS; Qingdao University of Science & Technology; ShanghaiTech University; ShanghaiTech University; Chinese Academy of Sciences; University of Science & Technology of China, CAS; Chinese Academy of Sciences; University of Science & Technology of China, CAS; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS

  Publication Year:2024

  Volume:11

  Issue:6

  DOI Link:http://dx.doi.org/10.1093/nsr/nwad308

  数据库ID（收录号）:WOS:001180128900001
• Record 275 of
  
  Title:Flexible fiberbotic laser scalpels: Material and fabrication challenges
  
  Author Full Names:Zou, Yuqi; Ren, Zhihe; Xiang, Yuanzhuo; Liu, Chao; Gao, Anzhu; Huang, Shaoping; Yang, Lvyun; Hou, Chong; Guo, Haitao; Yang, Guang-Zhong; Tao, Guangming

  Source Title:MATTER

  Language:English

  Document Type:Article

  Keywords Plus:CHALCOGENIDE GLASS-FIBERS; YAG LASER; ER-YAG; SINGLE-MODE; ABLATION; WAVE; DELIVERY; ROBOTS; TRANSMISSION; TECHNOLOGY

  Abstract:Rapidly developed fiber lasers have shown great potential in interventional urology, inspiring the use of advanced laser delivery to meet the demand for manipulation in other complex surgical scenarios. While medical robots are enhancing precision in the field of minimally invasive surgery, laser ablation has been demonstrated as a promising candidate compared to traditional mechanical cutting tools in interventions. Nevertheless, based on their ablation mechanisms, the advantages of lasers are still not fully leveraged. In this Perspective, we outline how fiber -shaped robots combined with laser scalpels are primed to emerge as the next generation of medical robots to achieve minimally invasive surgery. We review the mechanisms involved, analyze their applications, and discuss several prospects for future applications.

  Addresses:[Zou, Yuqi; Ren, Zhihe; Xiang, Yuanzhuo; Liu, Chao; Yang, Lvyun; Tao, Guangming] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China; [Zou, Yuqi; Ren, Zhihe; Xiang, Yuanzhuo; Liu, Chao; Yang, Lvyun; Hou, Chong; Tao, Guangming] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China; [Zou, Yuqi; Ren, Zhihe; Xiang, Yuanzhuo; Liu, Chao; Tao, Guangming] Huazhong Univ Sci & Technol, Tongji Hosp, Key Lab Vasc Aging, Minist Educ,Tongji Med Coll, Wuhan 430030, Peoples R China; [Gao, Anzhu] Shanghai Jiao Tong Univ, Dept Automat, Shanghai 200240, Peoples R China; [Gao, Anzhu; Huang, Shaoping; Yang, Guang-Zhong; Tao, Guangming] Shanghai Jiao Tong Univ, Inst & Med Robot, Shanghai 200240, Peoples R China; [Hou, Chong] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China; [Guo, Haitao] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Shaanxi, Peoples R China

  Affiliations:Huazhong University of Science & Technology; Huazhong University of Science & Technology; Huazhong University of Science & Technology; Shanghai Jiao Tong University; Shanghai Jiao Tong University; Huazhong University of Science & Technology; State Key Laboratory of Transient Optics & Photonics; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS

  Publication Year:2024

  Volume:7

  Issue:3

  Start Page:758

  End Page:771

  DOI Link:http://dx.doi.org/10.1016/j.matt.2024.01.007

  数据库ID（收录号）:WOS:001202496000001
• Record 276 of
  
  Title:Scalable parallel ultrafast optical random bit generation based on a single chaotic microcomb
  
  Author Full Names:Li, Pu; Li, Qizhi; Tang, Wenye; Wang, Weiqiang; Zhang, Wenfu; Little, Brent E.; Chu, Sai Tek; Shore, K. Alan; Qin, Yuwen; Wang, Yuncai

  Source Title:LIGHT-SCIENCE & APPLICATIONS

  Language:English

  Document Type:Article

  Abstract:Random bit generators are critical for information security, cryptography, stochastic modeling, and simulations. Speed and scalability are key challenges faced by current physical random bit generation. Herein, we propose a massively parallel scheme for ultrafast random bit generation towards rates of order 100 terabit per second based on a single micro-ring resonator. A modulation-instability-driven chaotic comb in a micro-ring resonator enables the simultaneous generation of hundreds of independent and unbiased random bit streams. A proof-of-concept experiment demonstrates that using our method, random bit streams beyond 2 terabit per second can be successfully generated with only 7 comb lines. This bit rate can be easily enhanced by further increasing the number of comb lines used. Our approach provides a chip-scale solution to random bit generation for secure communication and high-performance computation, and offers superhigh speed and large scalability.

  Addresses:[Li, Pu; Qin, Yuwen; Wang, Yuncai] Guangdong Univ Technol, Inst Adv Photon Technol, Sch Informat Engn, Guangzhou 51006, Peoples R China; [Li, Pu; Qin, Yuwen; Wang, Yuncai] Guangdong Univ Technol, Key Lab Photon Technol Integrated Sensing & Commun, Minist Educ China, Guangzhou 51006, Peoples R China; [Li, Pu; Qin, Yuwen; Wang, Yuncai] Guangdong Univ Technol, Guangdong Prov Key Lab Informat Photon Technol, Guangzhou 51006, Peoples R China; [Li, Qizhi; Tang, Wenye] Taiyuan Univ Technol, Key Lab Adv Transducers & Intelligent Control Syst, Minist Educ, Taiyuan 030024, Peoples R China; [Wang, Weiqiang; Zhang, Wenfu; Little, Brent E.] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China; [Chu, Sai Tek] City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Peoples R China; [Shore, K. Alan] Bangor Univ, Sch Elect Engn, Bangor LL57 1UT, Wales

  Affiliations:Guangdong University of Technology; Guangdong University of Technology; Guangdong University of Technology; Taiyuan University of Technology; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; State Key Laboratory of Transient Optics & Photonics; City University of Hong Kong; Bangor University

  Publication Year:2024

  Volume:13

  Issue:1

  Article Number:66

  DOI Link:http://dx.doi.org/10.1038/s41377-024-01411-7

  数据库ID（收录号）:WOS:001178123300002