2024

• Record 97 of
  
  Title:Linearly polarized RABBIT beyond the dipole approximation
  
  Author Full Names:Liao, Yijie; Chen, Yongkun; Dahlstrom, Jan Marcus; Pi, Liang-Wen; Lu, Peixiang; Zhou, Yueming

  Source Title:PHYSICAL REVIEW A

  Language:English

  Document Type:Article

  Keywords Plus:ELECTRIC QUADRUPOLE TRANSITIONS; ABOVE-THRESHOLD-IONIZATION; QUANTUM ELECTRODYNAMICS; ANGULAR-DISTRIBUTIONS; PHOTOIONIZATION; GAUGE; MULTIPOLE; PHOTOELECTRONS; RETARDATION; PULSES

  Abstract:We theoretically investigate nondipole effects in the reconstruction of attosecond beating by interference of two-photon transitions (RABBIT) of helium using linearly polarized extreme ultraviolet and infrared fields. By scanning the time delay between the two fields, we observe modulations in sidebands (SBs) both for angularintegrated photoelectron yield and forward-backward asymmetry in photoelectron distribution along the lightpropagation direction. The SB modulations of the forward-backward asymmetry reveal Wigner and continuumcontinuum time delays of the electron wave packets ionized via nondipole paths, different from the conventional RABBIT where only the dipole paths are involved. Furthermore, the time delays extracted from the forwardbackward asymmetry show an abrupt jump as a function of polar emission angle of photoelectrons, due to the competition among continuum partial waves in nondipole laser-assisted photoionization.

  Addresses:[Liao, Yijie; Chen, Yongkun; Lu, Peixiang; Zhou, Yueming] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China; [Liao, Yijie; Chen, Yongkun; Lu, Peixiang; Zhou, Yueming] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Peoples R China; [Dahlstrom, Jan Marcus] Lund Univ, Dept Phys, Box 118, SE-22100 Lund, Sweden; [Pi, Liang-Wen] Chinese Acad Sci, Ctr Attosecond Sci & Technol, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Lu, Peixiang] Opt Valley Lab, Wuhan 430074, Hubei, Peoples R China; [Zhou, Yueming] Hubei Opt Fundamental Res Ctr, Wuhan 430074, Peoples R China

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

  Publication Year:2024

  Volume:110

  Issue:2

  Article Number:23109

  DOI Link:http://dx.doi.org/10.1103/PhysRevA.110.023109

  数据库ID（收录号）:WOS:001298654000005
• Record 98 of
  
  Title:Enhanced secondary electron emission properties of sputter-deposited MgO-Au composite film via Cr doping
  
  Author Full Names:Liu, Li; Li, Jie; Xia, Zhangcong; Liu, Biye; Liu, Hulin; Wu, Shengli; Hu, Wenbo

  Source Title:VACUUM

  Language:English

  Document Type:Article

  Keywords Plus:CERMET FILMS; BEHAVIOR; XPS

  Abstract:High and stable secondary electron emission yield (SEY) is essential for thin film materials used for electrical signal amplification in electronic devices. To enhance the secondary electron emission (SEE) capability of MgO-Au composite film, Cr-doped MgO-Au film was prepared by magnetron sputtering and the effect of Cr doping on the SEE properties of MgO-Au film was intensively investigated. It was confirmed that the doped Cr element is distributed through the whole composite film in a form of Cr2O3. 2 O 3 . Compared to the conventional MgO-Au film, the Cr-doped MgO-Au film with a Cr/(Cr + Mg) atomic ratio of 0.71 % achieves a SEY of 7.1 with a 4.4 % rise at the primary electron energy (Ep) E p ) of 300 eV and a maximum SEY of 10.9 with a 10.1 % increase at the E p of 800 eV, and it also has a reduction of 49.2 % in SEE decay rate under continuous electron bombardment. For this novel composite film, the SEY ascension mainly attributes to the MgO grain enlargement and chemical stability enhancement, and the decreased SEE decay rate is associated with the improvements of resistance to electron bombardment and electric conductivity induced by Cr doping.

  Addresses:[Liu, Li; Li, Jie; Xia, Zhangcong; Liu, Biye; Wu, Shengli; Hu, Wenbo] Xi An Jiao Tong Univ, Minist Educ, Sch Elect Sci & Engn, Key Lab Phys Elect & Devices, 28 Xianning West Rd, Xian 710049, Peoples R China; [Wu, Shengli; Hu, Wenbo] Xi An Jiao Tong Univ, Sch Elect Sci & Engn, Moe Key Lab Multifunct Mat & Struct, 28 Xianning West Rd, Xian 710049, Peoples R China; [Liu, Hulin] Chinese Acad Sci, Xian Inst Opt & Precis Mech, 17 Xinxi Rd, Xian 710119, Peoples R China

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

  Publication Year:2024

  Volume:229

  Article Number:113545

  DOI Link:http://dx.doi.org/10.1016/j.vacuum.2024.113545

  数据库ID（收录号）:WOS:001298982000001
• Record 99 of
  
  Title:Highly sensitive CD40L protein discrimination via label-free fiber sensing technologies
  
  Author Full Names:Hu, Mingxuan; Li, Xuying; Li, Yansong; Wang, Ruiduo; Kang, Tongyuan; Xu, Fuxing; Bai, Jintao; Jiang, Man; Zhu, Yaomin

  Source Title:ANALYST

  Language:English

  Document Type:Article

  Abstract:The recombinant Cluster of Differentiation 40 Ligand (CD40L) can be expressed in various cells and is closely related to various types of cancer. This association underscores the critical need for expedited and precise measurement of CD40L levels in clinical fluid specimens. A novel optical fiber biosensor has been devised, employing single-mode fibers that are sandwiched around a coreless fiber, with the diameter refined by etching with hydrogen fluoride. This innovative configuration allows for light transmission through the evanescent field, thereby enhancing the sensor's sensitivity to changes in the surrounding refractive index. Employing chemical binding techniques, CD40 was securely immobilized onto the fiber's surface, facilitating the detection of CD40L. The sensor exhibited a sensitivity of 1.126 nm (mu g mL(-1))(-1) and a detection limit of 0.68 nM. Furthermore, the sensor's specificity for CD40L was validated using authentic clinical serum samples spiked with artificial analytes. In addition, the specificity of CD40L of the proposed sensor was proved using natural clinical serum samples with added artificial analyte, assisted by the ELISA method, and the results ideally conformed with the detection of standard samples. With the aid of the ELISA method, the outcomes were found to be in excellent agreement with those from standard sample detection. Consequently, the findings indicate that this sensor provides a specific, label-free, and highly sensitive method for CD40L detection, showcasing its significant potential for applications in molecular biology research.

  Addresses:[Hu, Mingxuan; Wang, Ruiduo; Kang, Tongyuan; Bai, Jintao; Jiang, Man] Northwest Univ, Sch Phys, Int Collaborat Ctr Photoelect Technol & Nano Funct, State Key Lab Photon Technol Western China Energy,, Xian 710069, Peoples R China; [Li, Yansong; Zhu, Yaomin] Xi An Jiao Tong Univ, Affiliated Hosp 1, Dept Anesthesiol & Ctr Brain Sci, Xian 710061, Shaanxi, Peoples R China; [Wang, Ruiduo] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Li, Xuying] Hainan Med Univ, Hainan Affiliated Hosp, Hainan Gen Hosp, Dept Anesthesiol, Haikou 570100, Hainan, Peoples R China; [Xu, Fuxing] Shanxi Med Univ, Chinese Acad Med Sci, Shanxi Hosp, Dept Anesthesiol,Shanxi Prov Canc Hosp,Canc Hosp, Taiyuan 030013, Shanxi, Peoples R China

  Affiliations:Northwest University Xi'an; Xi'an Jiaotong University; State Key Laboratory of Transient Optics & Photonics; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Hainan Medical University; Shanxi Medical University; Chinese Academy of Medical Sciences - Peking Union Medical College

  Publication Year:2024

  Volume:149

  Issue:20

  DOI Link:http://dx.doi.org/10.1039/d4an00867g

  数据库ID（收录号）:WOS:001303101400001
• Record 100 of
  
  Title:Color-restoring and energy-saving imaging monitoring for intelligent offshore engineering
  
  Author Full Names:Quan, Xiangqian; Chen, Xiangzi; Wei, Yucong; Li, Zizheng; Li, Yun; Yan, Peng

  Source Title:OCEAN ENGINEERING

  Language:English

  Document Type:Article

  Keywords Plus:UNDERWATER; ENHANCEMENT; RESTORATION

  Abstract:Images play a crucial role in artificial intelligence (AI) for offshore engineering, which provide a large amount of data for machine intelligence to ensure the safe operation and maintenance of offshore structures. However, due to the attenuation of sunlight in water or monitoring at nighttime, underwater imaging monitoring systems need a light source, which consumes a lot of energy and impacts the load capacity of an offshore monitoring system. In addition, due to the nonlinearity of attenuation at different wavelengths, underwater images generally suffer from color deviation, tending to be blue and green, which decreases the accuracy of machine learning and intelligent recognition in unmanned offshore engineering. In order to reduce energy consumption and enhance color restoration, we proposed and designed a three-detector underwater imaging system (TD&TP-UIS) based on a prism, in which three detectors were used to enhance the utilization efficiency of light, and a gated band coating was designed on the prism to enhance the color reproduction. A series of experiments were carried out in water tanks, pools, Qiandao Lake, and other places to verify the advantage of color restoration and energy saving using the TD&TP-UIS.

  Addresses:[Quan, Xiangqian; Wei, Yucong] Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China; [Chen, Xiangzi] Hainan Trop Ocean Univ, Yazhou Bay Innovat Inst, Sanya 572022, Peoples R China; [Wei, Yucong] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Chen, Xiangzi] Hainan Trop Ocean Univ, Coll Marine Sci & Technol, Sanya 572022, Peoples R China; [Li, Zizheng] Sun Yat sen Univ, TianQin Res Ctr Gravitat Phys, MOE Key Lab TianQin Miss, Zhuhai Campus, Zhuhai 519082, Peoples R China; [Li, Zizheng] Sun Yat sen Univ, Frontiers Sci Ctr TianQin, Gravitat Wave Res Ctr CNSA, Sch Phys & Astron, Zhuhai Campus, Zhuhai 519082, Peoples R China; [Li, Yun; Yan, Peng] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China

  Affiliations:Chinese Academy of Sciences; Institute of Deep-Sea Science & Engineering, CAS; Hainan Tropical Ocean University; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Hainan Tropical Ocean University; Sun Yat Sen University; Sun Yat Sen University; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS

  Publication Year:2024

  Volume:311

  Article Number:118951

  DOI Link:http://dx.doi.org/10.1016/j.oceaneng.2024.118951

  数据库ID（收录号）:WOS:001297668700001
• Record 101 of
  
  Title:X-ray compressed ultrafast photography under the constraint of time-integrated-image for X-pinch
  
  Author Full Names:Zhou, Haoyu; Yao, Zhiming; Sheng, Liang; Song, Yan; Liu, Zhen; Han, Changcai; Zhu, Zijian; Li, Yang; Duan, Baojun; Ji, Chao; Wu, Jian; Hei, Dongwei; Liu, Yinong

  Source Title:OPTICS AND LASERS IN ENGINEERING

  Language:English

  Document Type:Article

  Keywords Plus:PLASMA

  Abstract:This paper presents a time-integrated-image-constrained X-ray compressed ultrafast photography system for comprehensive measurement of the aluminum X-pinch evolution process. The system incorporates a pinhole and a scintillator to convert the X-ray video to fluorescence video. The fluorescence video is recorded by a compressed ultrafast photography channel and a time-integrated imaging channel respectively. By recording the fluorescence video instead of the self-emission visible light video, the long tailing effect can be significantly inhibited, which is more conducive to the image reconstruction of the compressed ultrafast photography channel. In addition, by combining the time-integrated imaging channel, the reconstruction quality is significantly improved. Based on the Qin-I pulsed power facility, we recorded the continuous two-dimensional X-ray evolution process of aluminum X-pinch for the first time. Our results contribute to deep insights into the temporal-spatial distribution of the X-pinch imploding plasma. It can also offer direction for the assessing of X-ray backlight photography applications at the X-pinch facility.

  Addresses:[Zhou, Haoyu] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China; [Zhou, Haoyu; Yao, Zhiming; Sheng, Liang; Song, Yan; Liu, Zhen; Han, Changcai; Zhu, Zijian; Li, Yang; Duan, Baojun; Hei, Dongwei; Liu, Yinong] Northwest Inst Nucl Technol, Natl Key Lab Intense Pulsed Radiat Simulat & Effec, Xian 710024, Peoples R China; [Ji, Chao] Chinese Acad Sci, Key Lab Ultrafast Photoelect Diagnost Technol, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Wu, Jian] Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China

  Affiliations:Tsinghua University; Northwest Institute of Nuclear Technology - China; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Xi'an Jiaotong University

  Publication Year:2024

  Volume:183

  Article Number:108508

  DOI Link:http://dx.doi.org/10.1016/j.optlaseng.2024.108508

  数据库ID（收录号）:WOS:001297729100001
• Record 102 of
  
  Title:Atomistic evidence of nucleation mechanism for the direct graphite-to-diamond transformation
  
  Author Full Names:Luo, Duan; Yang, Liuxiang; Xie, Hongxian; Srinivasan, Srilok; Tian, Jinshou; Sankaranarayanan, Subramanian; Arslan, Ilke; Yang, Wenge; Mao, Ho-kwang; Wen, Jianguo

  Source Title:CARBON

  Language:English

  Document Type:Article

  Keywords Plus:POLYCRYSTALLINE DIAMOND; DIRECT CONVERSION; HEXAGONAL DIAMOND; LONSDALEITE; PRESSURE; TRANSITION; PATH

  Abstract:The direct graphite-to-diamond transformation mechanism has been a subject of intense study and remains debated concerning the initial stages of the conversion, the intermediate phases, and their transformation pathways. Here, we successfully recover samples at the early conversion stage by tuning high-pressure/hightemperature conditions and reveal direct evidence supporting the nucleation-growth mechanism. Atomistic observations show that intermediate orthorhombic graphite phase mediates the growth of diamond nuclei. Furthermore, we observe that quenchable orthorhombic and rhombohedra graphite are stabilized in buckled graphite at lower temperatures. These intermediate phases are further converted into hexagonal and cubic diamond at higher temperatures following energetically favorable pathways in the order: graphite -* orthorhombic graphite -* hexagonal diamond, graphite -* orthorhombic graphite -* cubic diamond, graphite -* rhombohedra graphite -* cubic diamond. These results significantly improve our understanding of the transformation mechanism, enabling the synthesis of different high-quality forms of diamond from graphite.

  Addresses:[Luo, Duan; Srinivasan, Srilok; Sankaranarayanan, Subramanian; Arslan, Ilke; Wen, Jianguo] Argonne Natl Lab, Ctr Nanoscale Mat, Lemont, IL 60439 USA; [Yang, Liuxiang; Yang, Wenge; Mao, Ho-kwang] Ctr High Pressure Sci & Technol Adv Res, Beijing 100094, Peoples R China; [Xie, Hongxian] Hebei Univ Technol, Tianjin 300132, Peoples R China; [Tian, Jinshou] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Key Lab Ultrafast Photoelect Diagnost Technol, Xian 710119, Peoples R China; [Mao, Ho-kwang] Inst Shanghai Adv Res Phys Sci, Shanghai Key Lab MFree, Pudong 201203, Shanghai, Peoples R China

  Affiliations:United States Department of Energy (DOE); Argonne National Laboratory; Hebei University of Technology; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS

  Publication Year:2024

  Volume:229

  Article Number:119538

  DOI Link:http://dx.doi.org/10.1016/j.carbon.2024.119538

  数据库ID（收录号）:WOS:001297568800001
• Record 103 of
  
  Title:An enhanced gated MCP-PMT for neutron detection in laser fusion experiments
  
  Author Full Names:Li, Kuinian; Chen, Ping; Liu, Hulin; Wei, Yonglin; He, Luanxuan; Su, Xiao; Yang, Yang; Gou, Yongsheng; Tian, Jinshou; Wu, Shengli; Yuan, Xiaohui; Zhang, Zhe; Zhang, Jie

  Source Title:NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT

  Language:English

  Document Type:Article

  Abstract:The microchannel plate photomultiplier tube (MCP-PMT) is a photodetector that utilizes microchannel plates for signal amplification, offering rapid pulse response time of sub-nanosecond with a compact design and low dark current. A series of enhanced gated MCP-PMTs have been developed by incorporating a gating electrode between the photocathode and the MCPs, which have been employed in neutron detection during the double-cone ignition laser fusion experiment at the SGII Upgrade laser facilities.

  Addresses:[Li, Kuinian; Chen, Ping; Liu, Hulin; Wei, Yonglin; He, Luanxuan; Yang, Yang; Gou, Yongsheng; Tian, Jinshou] Chinese Acad Sci, Key Lab Ultrafast Photoelect Diagnost Technol, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Li, Kuinian; He, Luanxuan; Wu, Shengli] Xi An Jiao Tong Univ, Sch Elect Sci & Engn, Xian 710049, Peoples R China; [Li, Kuinian; He, Luanxuan] Univ Chinese Acad Sci, Beijing 100091, Peoples R China; [Su, Xiao; Yuan, Xiaohui; Zhang, Jie] Shanghai Jiao Tong Univ, Key Lab Laser Plasmas, Minist Educ, Shanghai 200240, Peoples R China; [Su, Xiao; Yuan, Xiaohui; Zhang, Jie] Shanghai Jiao Tong Univ, Sch Phys & Astron, Shanghai 200240, Peoples R China; [Zhang, Zhe; Zhang, Jie] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Inst Phys, Beijing 100190, Peoples R China; [Su, Xiao; Yuan, Xiaohui; Zhang, Jie] Shanghai Jiao Tong Univ, Collaborat Innovat Ctr IFSA, CICIFSA, Shanghai 200240, Peoples R China; [Chen, Ping] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China

  Affiliations:Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS; Xi'an Jiaotong University; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Shanghai Jiao Tong University; Shanghai Jiao Tong University; Chinese Academy of Sciences; Institute of Physics, CAS; Shanghai Jiao Tong University; Shanxi University

  Publication Year:2024

  Volume:1067

  Article Number:169726

  DOI Link:http://dx.doi.org/10.1016/j.nima.2024.169726

  数据库ID（收录号）:WOS:001296989900001
• Record 104 of
  
  Title:Ultrabroadband nonlinear enhancement of mid-infrared frequency upconversion in hyperbolic metamaterials
  
  Author Full Names:Zhang, Congfu; Wang, Zhaolu; Zhang, Changchang; Shi, Wenjuan; Li, Wei; Gao, Ke; Liu, Hongjun

  Source Title:NANOSCALE HORIZONS

  Language:English

  Document Type:Article

  Keywords Plus:2ND-HARMONIC GENERATION; LIGHT-ABSORPTION; EMISSION; EFFICIENCY

  Abstract:Metamaterials have demonstrated significant potential for enhancing nonlinear processes at the nanoscale. The presence of narrowband hot-spots and highly inhomogeneous mode-field distributions often limit the enhancement of nonlinear interactions over larger spatial scales. This has posed a formidable challenge in achieving simultaneous enhancement across a broadband spectral range, significantly constraining the potential of photonic nanostructures in enhancing nonlinear frequency conversion. Here, we propose a broadband resonant mode matching method through near-field examinations that supports the multipole modes and enables the development of an ultrabroadband-enhanced 3-5 mu m mid-infrared frequency upconversion technique utilizing a hyperbolic triangular pyramidal metasurface. The gap-plasma mode of the hyperbolic metamaterial multilayer system excites narrowly high-order resonances at near-infrared pump light wavelengths, while the slow-light effect generated by the dipoles achieves ultrabroadband near-field enhancement at mid-infrared wavelengths. The symmetry breaking of the triangular structure localizes these resonant modes at the tips, enabling mode-matched modulation at different wavelengths, and thus boosting the nonlinear frequency conversion process. Our approach provides a promising platform for metasurface-based frequency conversion techniques. We propose multipole coupling supported by the gap-plasma mode in HMMs which realize a mid-infrared frequency-upconversion process on the metasurface for first time.

  Addresses:[Zhang, Congfu; Wang, Zhaolu; Zhang, Changchang; Shi, Wenjuan; Li, Wei; Gao, Ke; Liu, Hongjun] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Liu, Hongjun] Shanxi Univ, Collabotat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China; [Zhang, Congfu; Zhang, Changchang; Shi, Wenjuan; Li, Wei; Gao, Ke] Univ Chinese Acad Sci, Beijing 100084, Peoples R China

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

  Publication Year:2024

  Volume:9

  Issue:10

  Start Page:1792

  End Page:1803

  DOI Link:http://dx.doi.org/10.1039/d4nh00240g

  数据库ID（收录号）:WOS:001289247300001
• Record 105 of
  
  Title:PDE Standardization Analysis and Solution of Typical Mechanics Problems
  
  Author Full Names:Wang, Ningjie; Wang, Yihao; Pei, Yongle; Li, Luxian

  Source Title:CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES

  Language:English

  Document Type:Article

  Abstract:A numerical approach is an effective means of solving boundary value problems (BVPs). This study focuses on physical problems with general partial differential equations (PDEs). It investigates the solution approach through the standard forms of the PDE module in COMSOL. Two typical mechanics problems are exemplified: The deflection of a thin plate, which can be addressed with the dedicated finite element module, and the stress of a pure bending beam that cannot be tackled. The procedure for the two problems regarding the three standard forms required by the PDE module is detailed. The results were in good agreement with the literature, indicating that the PDE module provides a promising means to solve complex PDEs, especially for those a dedicated finite element module has yet to be developed.

  Addresses:[Wang, Ningjie; Wang, Yihao; Li, Luxian] Xi An Jiao Tong Univ, Sch Aerosp Engn, State Key Lab Strength & Vibrat Mech Struct, Shaanxi Key Lab Environm & Control Flight Vehicle, Xian 710049, Peoples R China; [Pei, Yongle] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China

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

  Publication Year:2024

  Volume:141

  Issue:1

  Start Page:171

  End Page:186

  DOI Link:http://dx.doi.org/10.32604/cmes.2024.053520

  数据库ID（收录号）:WOS:001286701600001
• Record 106 of
  
  Title:A design of compact plasmonic lens consisting of high index dielectric gratings and metal nano-film
  
  Author Full Names:Jia, Sen; Wang, Xianhua; Zhou, Libing

  Source Title:OPTICS COMMUNICATIONS

  Language:English

  Document Type:Article

  Keywords Plus:EXTRAORDINARY OPTICAL-TRANSMISSION; SUBWAVELENGTH; LIGHT; SIZE

  Abstract:In this paper, a hybrid ultra-thin planar subwavelength focusing structure consisting of a high refractive index dielectric grating and a nano metal film was designed. The thickness of this structure is only 200 nm. Surface plasmon polaritons (SPPs) were excited from the nano metal film, propagated along the metal-air interface, and were then converted into a radiation field by the dielectric grating, forming a focused spot in free space. By adjusting the grating position and width parameters, the shape of the focused optical field could be controlled. The simulation results showed that, under 532 nm light irradiation, the lens could produce a 270 nm (full width at half-maximum, FWHM) spot size at a focal length of 2.462. Moreover, under the illumination of 633 nm and 780 nm light, the designed lenses were found to produce focal spot sizes of 304 nm (0.482) and 364 nm (0.472), respectively, which were smaller than the diffraction limit. The simplicity of this plasmonic lens design, coupled with its reduced thickness and minimal absorption loss, offered significant advantages in terms of costeffectiveness and ease of fabrication.

  Addresses:[Jia, Sen; Wang, Xianhua] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Zhou, Libing] Shaanxi Univ Sci & Technol, Sch Phys & Informat, Xian 710021, Peoples R China

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

  Publication Year:2024

  Volume:570

  Article Number:130928

  DOI Link:http://dx.doi.org/10.1016/j.optcom.2024.130928

  数据库ID（收录号）:WOS:001290220800001
• Record 107 of
  
  Title:Topology optimization design of surface radar absorbing coatings
  
  Author Full Names:Chen, Fei; Zhu, Jihong; Li, Fu; Lu, Di; Yu, Jirui; Guo, Song; Yang, Jianfeng; Lv, Baogang; Xue, Bin

  Source Title:ENGINEERING OPTIMIZATION

  Language:English

  Document Type:Article; Early Access

  Keywords Plus:STRUCTURAL DESIGN

  Abstract:In this study, a topology optimization method is proposed to design the layout of the radar absorbing coatings (RACs) outside the surface. The radar cross section (RCS) of a structure with RACs is evaluated by the physical optics method. A material interpolation model oriented to the relative permittivity and relative permeability of RACs is established, while the sensitivity of the RCS with respect to the design variables is derived analytically. With the objective of minimizing the RCS at the specified incident angles and the constraint of the material usage, the strategy is implemented based on a gradient-based algorithm and the so-called three-field density method. Additionally, the phenomenon of the RCS increasing in certain regions when RACs are applied is explained in detail. Finally, the effectiveness of the proposed method is demonstrated by two numerical examples.

  Addresses:[Chen, Fei; Li, Fu; Lu, Di; Yu, Jirui; Guo, Song; Yang, Jianfeng; Lv, Baogang; Xue, Bin] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian, Peoples R China; [Zhu, Jihong] Northwestern Polytech Univ, State IJR Ctr Aerosp Design & Addit Mfg, Xian, Peoples R China

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

  Publication Year:2024

  DOI Link:http://dx.doi.org/10.1080/0305215X.2024.2349108

  数据库ID（收录号）:WOS:001282730200001
• Record 108 of
  
  Title:Polarization-Independent Perfect Absorption in Monolayer Black Phosphorus Metasurfaces at Terahertz Frequencies via Critical Coupling
  
  Author Full Names:Long, Xuewen; Bai, Jing; Zhang, Yingjun; Zhu, Mingshan; Guo, Xiuli; Wang, Jin; Wang, Weiqiang; Lou, Rui

  Source Title:ACS OMEGA

  Language:English

  Document Type:Article

  Keywords Plus:ANISOTROPIC ABSORPTION; SURFACE-PLASMONS; BAND; LIGHT

  Abstract:Two-dimensional (2D) materials, which possess rich underlying physical properties that can provide the potential for designing more efficient and compact optoelectronic devices, have attracted great interest among scientists. Due to the atomic-scale thickness and the anisotropy of in-plane conductivity, 2D black phosphorus (BP) exhibits a polarization-dependent absorption spectrum with low absorption, which limits its further development in polarization-independent applications such as light absorbers and sensors. In this paper, a polarization-independent perfect absorber in the terahertz band is proposed, which is composed of a patterned BP monolayer deposited on a lossless photonic crystal (PC) slab with a back reflection mirror. The absorption of the patterned BP monolayer can reach 100% at resonant frequencies through the critical coupling mechanism of guided resonance. Moreover, the absorber exhibits polarization-independent absorption characteristics for vertically incident light, which are attributed to the 4-fold rotational symmetry of the PC substrate and the patterned BP monolayer deposited on it. This work opens up the possibility of fabricating optically polarization-independent devices based on single-layer 2D anisotropic materials.

  Addresses:[Long, Xuewen; Zhang, Yingjun; Zhu, Mingshan; Guo, Xiuli] Hunan Univ Med, Inst Med Phys, Huaihua 418000, Peoples R China; [Bai, Jing; Wang, Jin] Taiyuan Normal Univ, Dept Phys, Jinzhong 030619, Peoples R China; [Wang, Weiqiang] Shaanxi Univ Sci & Technol, Sch Elect Informat & Artificial Intelligence, Xian 710021, Peoples R China; [Lou, Rui] Chinese Acad Sci, Ctr Attosecond Sci & Technol, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China

  Affiliations:Taiyuan Normal University; Shaanxi University of Science & Technology; Chinese Academy of Sciences; Xi'an Institute of Optics & Precision Mechanics, CAS

  Publication Year:2024

  Volume:9

  Issue:32

  Start Page:35052

  End Page:35059

  DOI Link:http://dx.doi.org/10.1021/acsomega.4c05203

  数据库ID（收录号）:WOS:001284118500001