2024

• Record 193 of
  
  Title:Design of electronic readout system for resistive anode based on FPGA
  
  Author Full Names:Song, Yuchao; Zhang, Wenwen; Zheng, Jinkun; Yang, Yang; Bai, Yonglin; La, Anpeng; Duan, Jinyao

  Source Title:IEICE ELECTRONICS EXPRESS

  Language:English

  Document Type:Article

  Abstract:This paper presents an electronic readout system based on the resistance anode, which is capable of processing the output signal from the resistance anode. This design divides the electronic readout circuit into two parts: analog circuit design and digital circuit design. The analog pre-processing circuit the electric charge signal from the resistive anode detector into a voltage signal and amplifies it and the digital part consists of a trapezoidal double -channel shaping algorithm implemented in FPGA. This design overcomes pulse pile-up at high count rates.

  Addresses:[Song, Yuchao; Zhang, Wenwen; La, Anpeng] Xian Univ Post & Telecommun, Sch Elect Engn, Xian 710121, Peoples R China; [Zheng, Jinkun; Yang, Yang; Bai, Yonglin; Duan, Jinyao] Chinese Acad Sci, Xian Inst Opt & Precis Mech XIOPM, Key Lab Ultrafast Photoelect Diagnost Technol, Xian 710119, Peoples R China; [Zheng, Jinkun; Bai, Yonglin] Univ Chinese Acad Sci CAS, Beijing 100049, Peoples R China

  Affiliations:Xi'an University of Posts & Telecommunications; 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:21

  Issue:10

  Article Number:20240117

  DOI Link:http://dx.doi.org/10.1587/elex.21.20240117

  数据库ID（收录号）:WOS:001237801300005
• Record 194 of
  
  Title:Fundamental and dipole gap solitons and their dynamics in the cubic-quintic fractional nonlinear Schrödinger model with a PT-symmetric lattice
  
  Author Full Names:Wang, Li; Zeng, Jianhua; Zhu, Yi

  Source Title:PHYSICA D-NONLINEAR PHENOMENA

  Language:English

  Document Type:Article

  Keywords Plus:SCHRODINGER-EQUATION; OPTICAL LATTICES; BREAKING

  Abstract:The interplay of two linear controlled terms - fractional diffraction and parity-time (PT ) symmetric lattice - gives rise to unique and interesting linear Bloch gap structures within where the nonlinear localized gap modes may exist. In this study, we explore the formation and dynamics of one-dimensional gap solitons in the cubic-quintic physical model combining the fractional diffraction and PT symmetric lattice. Two classes of gap solitons, which we name the fundamental gap solitons and dipole ones, are constructed and their stability regions within the first finite gap of the associated linear Bloch spectrum are identified by means of linear-stability analysis and direct perturbed numerical simulations. We stress that the gap solitons are always unstable under the condition of PT symmetry breaking (the imaginary part of which is above 0.5). The excitations of the stable two classes of gap solitons are also investigated by using the adiabatic variation of the system's parameters. The results predicted here shed some light on soliton physics in physical systems with combined fractional diffraction and PT symmetric lattice and the competing nonlinearities.

  Addresses:[Wang, Li; Zhu, Yi] Beijing Inst Math Sci & Applicat, Beijing 101408, Peoples R China; [Wang, Li; Zhu, Yi] Tsinghua Univ, Yau Math Sci Ctr, Beijing 100084, Peoples R China; [Wang, Li; Zeng, Jianhua] Tsinghua Univ, Dept Math, Beijing 100084, Peoples R China; [Wang, Li; Zeng, Jianhua] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Ctr Attosecond Sci & Technol, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China; [Zeng, Jianhua] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Zeng, Jianhua] Shanxi Univ, Collaborat lnnovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China

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

  Publication Year:2024

  Volume:465

  Article Number:134144

  DOI Link:http://dx.doi.org/10.1016/j.physd.2024.134144

  数据库ID（收录号）:WOS:001246287800001
• Record 195 of
  
  Title:Streak tube imaging lidar with kilohertz laser pulses and few-photons detection capability
  
  Author Full Names:Fang, Mengyan; Qiao, Kai; Yin, Fei; Xue, Yanhua; Chang, Yu; Su, Chang; Wang, Zhengzheng; Tian, Jinshou; Wang, Xing

  Source Title:OPTICS EXPRESS

  Language:English

  Document Type:Article

  Keywords Plus:NOISE PERFORMANCE ANALYSIS; IMPROVEMENT; ACCURACY

  Abstract:Lidar using active light illumination is capable of capturing depth and reflectivity information of target scenes. Among various technologies, streak tube imaging lidar (STIL) has garnered significant attention due to its high resolution and excellent precision. The echo signals of a STIL system using single laser pulse are often overwhelmed by noise in complex environments, making it difficult to discern the range of the target. By combining high-frequency laser pulses with the repetitive sweep circuit, the STIL system enables efficient detection of few-photons signal in weak-light environments. Additionally, we have developed a robust algorithm for estimating the depth and reflectivity images of targets. The results demonstrate that this lidar system achieves a depth resolution better than 0.5 mm and a ranging accuracy of 95 um. Furthermore, the imaging of natural scenes also validates the exceptional 3D imaging capability of this system. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

  Addresses:[Fang, Mengyan; Qiao, Kai; Yin, Fei; Xue, Yanhua; Chang, Yu; Su, Chang; Wang, Zhengzheng; Tian, Jinshou; Wang, Xing] Chinese Acad Sci, Key Lab Ultrafast Photoelect Diag Technol, Xian Inst Opt & Precis Mech XIOPM, Xian 710119, Shaanxi, Peoples R China; [Fang, Mengyan; Su, Chang; Tian, Jinshou] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China; [Tian, Jinshou] 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; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Shanxi University

  Publication Year:2024

  Volume:32

  Issue:11

  Start Page:19042

  End Page:19056

  DOI Link:http://dx.doi.org/10.1364/OE.520620

  数据库ID（收录号）:WOS:001238184100002
• Record 196 of
  
  Title:Single-pixel imaging based on self-supervised conditional mask classifier-free guidance
  
  Author Full Names:Li, Qianxi; Yan, Qiurong; Dong, Jiawei; Feng, Jia; Wu, Jiaxin; Cao, Jianzhong; Liu, Guangsen; Wang, Hao

  Source Title:OPTICS EXPRESS

  Language:English

  Document Type:Article

  Abstract:Reconstructing high -quality images at a low measurement rate is a pivotal objective of Single -Pixel Imaging (SPI). Currently, deep learning methods achieve this by optimizing the loss between the target image and the original image, thereby constraining the potential of low measurement values. We employ conditional probability to ameliorate this, introducing the classifier -free guidance model (CFG) for enhanced reconstruction. We propose a self -supervised conditional masked classifier -free guidance (SCM-CFG) for single -pixel reconstruction. At a 10% measurement rate, SCM-CFG efficiently completed the training task, achieving an average peak signal-to-noise ratio (PSNR) of 26.17 dB on the MNIST dataset. This surpasses other methods of photon imaging and computational ghost imaging. It demonstrates remarkable generalization performance. Moreover, thanks to the outstanding design of the conditional mask in this paper, it can significantly enhance the accuracy of reconstructed images through overlay. SCM-CFG achieved a notable improvement of an average of 7.3 dB in overlay processing, in contrast to only a 1 dB improvement in computational ghost imaging. Subsequent physical experiments validated the effectiveness of SCM-CFG. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

  Addresses:[Li, Qianxi; Dong, Jiawei; Feng, Jia; Wu, Jiaxin; Cao, Jianzhong; Liu, Guangsen; Wang, Hao] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Li, Qianxi; Dong, Jiawei; Wu, Jiaxin] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Yan, Qiurong] Nanchang Univ, Coll Informat Engn, Nanchang 330031, 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; Nanchang University

  Publication Year:2024

  Volume:32

  Issue:11

  Start Page:18771

  End Page:18789

  DOI Link:http://dx.doi.org/10.1364/OE.518455

  数据库ID（收录号）:WOS:001239044000003
• Record 197 of
  
  Title:Enhancement and suppression of nonsequential double ionization by spatially inhomogeneous fields
  
  Author Full Names:Luo, Xuan; Jiao, Li Guang; Liu, Aihua; Liu, Xueshen

  Source Title:OPTICS EXPRESS

  Language:English

  Document Type:Article

  Keywords Plus:ABOVE-THRESHOLD IONIZATION; HARMONIC-GENERATION; DYNAMICS; HELIUM

  Abstract:Using the three-dimensional classical ensemble approach, we theoretically investigate the nonsequential double ionization of argon atoms in an intense laser field enhanced by bowtienanotip. We observe an anomalous decrease in the double ionization yield as the laser intensity increases, along with a significant gap in the low momentum of photoelectrons. According to our theoretical analysis, the finite range of the induced field by the nanostructure is the fundamental cause of the decline in double ionization yield. Driven by the enhanced inhomogeneous field, energetic electrons can escape from the finite range of nanotips without returning. This reduces the possibility of re-scattering on the nucleus and imprints the finite size effect into the double ionization yield and momentum distribution of photoelectrons in the form of yield decline and a gap in the photoelectron-momentum distribution. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

  Addresses:[Luo, Xuan; Liu, Aihua; Liu, Xueshen] Jilin Univ, Inst Atom & Mol Phys, Changchun 130012, Peoples R China; [Jiao, Li Guang] Jilin Univ, Coll Phys, Changchun 130012, Peoples R China; [Liu, Aihua] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China

  Affiliations:Jilin University; Jilin University; State Key Laboratory of Transient Optics & Photonics; Chinese Academy of Sciences

  Publication Year:2024

  Volume:32

  Issue:11

  Start Page:19825

  End Page:19836

  DOI Link:http://dx.doi.org/10.1364/OE.523593

  数据库ID（收录号）:WOS:001239697600003
• Record 198 of
  
  Title:Differentiable design of a double-freeform lens with multi-level radial basis functions for extended source irradiance tailoring
  
  Author Full Names:Tang, Haisong; Li, Haoran; Feng, Zexin; Luo, Yi; Mao, Xianglong

  Source Title:OPTICA

  Language:English

  Document Type:Article

  Keywords Plus:REFRACTIVE OPTICAL-ELEMENTS; ILLUMINATION OPTICS; SHAPE-DESCRIPTION; SURFACE DESIGN; SYSTEM-DESIGN; WAVE-FRONT; OFF-AXIS; COMPACT; LIGHT; GENERATION

  Abstract:Freeform optics are key for generating prescribed illumination patterns from given sources, which are crucial for solidstate lighting and machine vision illumination. There is an increasing demand for compact freeform optics, which presents a substantial challenge for current design methods since the source dimensions must be considered. Most current extended-source design methods, although requiring profound knowledge of optics and mathematics, focus on the modest goal of obtaining uniform irradiance distributions. We address a more challenging design problem of generating an irradiance distribution of arbitrary shape through a double-freeform lens that can fully encompass the extended source. We propose a differentiable design method whose uniqueness lies in the representation of the double-freeform surfaces using multi-level spherical radial basis functions, which has a natural link to a multi-scale optimization technique. In addition, we employ a sequential unconstrained minimization technology complemented with Lagrange multipliers that add key feasibility constraints on lens shape and size. The proposed method is flexible, general, and efficient in designing highly compact freeform lenses for generating both simple and complex irradiance distributions, as demonstrated through the design examples. This could enable a universal solution to the extended-source design problem. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

  Addresses:[Tang, Haisong; Li, Haoran; Feng, Zexin] Beijing Inst Technol, Beijing Engn Res Ctr Mixed Real & Adv Display, Sch Opt & Photon, Beijing 100081, Peoples R China; [Tang, Haisong; Li, Haoran; Feng, Zexin] Beijing Inst Technol, MOE Key Lab Optoelect Imaging Technol & Syst, Beijing 100081, Peoples R China; [Luo, Yi] Tsinghua Univ, Beijing Natl Res Ctr Informat Sci & Technol, Dept Elect Engn, Beijing 100084, Peoples R China; [Mao, Xianglong] Chinese Acad Sci, Xi An Inst Opt & Precis Mech, New Technol Lab Space Photon Informat, Xian 710119, Shaanxi, Peoples R China

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

  Publication Year:2024

  Volume:11

  Issue:5

  Start Page:653

  End Page:664

  DOI Link:http://dx.doi.org/10.1364/OPTICA.520485

  数据库ID（收录号）:WOS:001237035700002
• Record 199 of
  
  Title:Rapid and non-destructive identification of plastic particles through THz technology and machine learning
  
  Author Full Names:Zhang, Min; Peng, Zhongze; Xu, Xiaoguang; Xie, Xinru; Liu, Yong; Song, Qi

  Source Title:INFRARED PHYSICS & TECHNOLOGY

  Language:English

  Document Type:Article

  Keywords Plus:TIME-DOMAIN SPECTROSCOPY; REFRACTIVE-INDEX; TERAHERTZ; COMPOSITES

  Abstract:For fast and accurate non-destructive differentiation of plastic pellets with similar appearance during import and export inspections, as well as for quality control purposes. Terahertz technology offers a non-destructive analysis approach for samples from diverse fields. By integrating deep learning algorithms with terahertz time-domain spectroscopy (THz-TDS) and linear discriminant analysis (LDA), it is possible to establish a highly accurate terahertz spectroscopy qualitative identification model. Additionally, the incorporation of principal component analysis (PCA) enables the application of this model to higher dimensional data. Notable differences in absorption coefficient, phase difference, and refractive index are observed among different plastic particles. The implementation of this rapid, accurate, and non-destructive detection method can greatly facilitate the testing and identification of plastic particles in customs and quality inspection departments.

  Addresses:[Zhang, Min; Peng, Zhongze; Xie, Xinru; Liu, Yong] Shenzhen Univ, Coll Phys & Optoelect Engn, Key Lab Optoelect Devices & Syst, State Key Lab Transient Opt & Photon,Minist Educ &, Shenzhen, Peoples R China; [Zhang, Min; Peng, Zhongze; Xie, Xinru; Liu, Yong] Shenzhen Univ, Coll Phys & Optoelect Engn, Key Lab Optoelect Devices & Syst, State Key Lab Transient Opt & Photon,Minist Educ &, Xian, Peoples R China; [Song, Qi] Liaocheng Univ, Sch Phys Sci & Informat Technol, Shandong Key Lab Opt Commun Sci & Technol, Liaocheng, Peoples R China; [Xu, Xiaoguang] Shenzhen Acad Inspection, Quarantine, Shenzhen, Peoples R China

  Affiliations:Chinese Academy of Sciences; Shenzhen University; Chinese Academy of Sciences; Shenzhen University; State Key Laboratory of Transient Optics & Photonics; Liaocheng University

  Publication Year:2024

  Volume:140

  Article Number:105350

  DOI Link:http://dx.doi.org/10.1016/j.infrared.2024.105350

  数据库ID（收录号）:WOS:001333912500001
• Record 200 of
  
  Title:FPM-WSI: Fourier ptychographic whole slide imaging via feature-domain backdiffraction
  
  Author Full Names:Zhang, Shuhe; Wang, Aiye; Xu, Jinghao; Feng, Tianci; Zhou, Jinhua; Pan, An

  Source Title:OPTICA

  Language:English

  Document Type:Article

  Keywords Plus:MISALIGNMENT CORRECTION METHOD; PHASE RETRIEVAL; WIDE-FIELD; MICROSCOPY; ILLUMINATION; ROBUSTNESS

  Abstract:Fourier ptychographic microscopy (FPM) theoretically provides a solution to the trade-off between spatial resolution and field of view (FOV), and has promising prospects in digital pathology. However, block reconstruction and then stitching has become an unavoidable procedure for reconstruction of large FOV due to vignetting artifacts. This introduces digital stitching artifacts, as the existing image-domain optimization algorithms are highly sensitive to systematic errors. Such obstacles significantly impede the advancement and practical implementation of FPM, explaining why, despite a decade of development, FPM has not gained widespread recognition in the field of biomedicine. We report a feature-domain FPM (FD-FPM) based on the structure-aware forward model to realize stitching-free, full-FOV reconstruction. The loss function is uniquely formulated in the feature domain of images, which bypasses the troublesome vignetting effect and algorithmic vulnerability via feature-domain backdiffraction. Through massive simulations and experiments, we show that FD-FPM effectively eliminates vignetting artifacts for full-FOV reconstruction, and still achieves impressive reconstructions despite the presence of various systematic errors. We also found it has great potential in recovering the data with a lower spectrum overlapping rate, and in realizing digital refocusing without a prior defocus distance. With FD-FPM, we achieved full-color and high-throughput imaging (4.7 mm diameter FOV, 336 nm resolution in the blue channel) free of blocking-and-stitching procedures on a self-developed Fourier ptychographic microscopy whole slide imaging platform. The reported FD-FPM shows the value of FPM for various experimental circumstances, and offers physical insights useful for the developments of models for other computational imaging techniques. The reported platform demonstrates high-quality, high -speed imaging and low cost, and could find applications in many fields of biomedical research, as well as in clinical applications. (c) 2024 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

  Addresses:[Zhang, Shuhe; Wang, Aiye; Xu, Jinghao; Feng, Tianci; Pan, An] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Zhang, Shuhe] Maastricht Univ, Med Ctr, NL-6202 AZ Maastricht, Netherlands; [Zhang, Shuhe; Zhou, Jinhua] Anhui Med Univ, Sch Biomed Engn, Hefei 230032, Peoples R China; [Wang, Aiye; Xu, Jinghao; Feng, Tianci; Pan, An] 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; Maastricht University; Anhui Medical University; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS

  Publication Year:2024

  Volume:11

  Issue:5

  Start Page:634

  End Page:646

  DOI Link:http://dx.doi.org/10.1364/OPTICA.517277

  数据库ID（收录号）:WOS:001238513700001
• Record 201 of
  
  Title:High-efficiency longwave 2085 nm laser output in low-loss Ho3+-doped fluorotellurite glass fiber by 1976 nm in-band pumping
  
  Author Full Names:Feng, Shaohua; Shen, Yewei; Zhu, Jun; Liu, Chengzhen; Xu, Yantao; Xiao, Xusheng; Guo, Haitao

  Source Title:OPTICS AND LASER TECHNOLOGY

  Language:English

  Document Type:Article

  Keywords Plus:MU-M EMISSION

  Abstract:High-gain Ho3+-doped optical fibers are imperative exigency for > 2 mu m single-mode fiber lasers. Here, we have successfully developed and fabricated a low-loss Ho3+-doped fluorotellurite glass fiber. The high-power laser irradiation tolerance of the fiber was verified, and the end face of Ho3+-doped fluorotellurite glass fiber remained undamaged under a similar to 70 W of 981 nm CW laser irradiation. An unsaturated maximum 6.35 W@2085 nm single-mode laser output with a slope efficiency of 90.4 % was achieved in a 25 cm short fiber by homemade 1976 nm laser in-band pumping. To the best of our knowledge, this is currently the highest slope efficiency reported for Ho3+ doped fluorotellurite fiber lasers to date in a space laser cavity. The effects of the fiber length on the laser threshold, slope efficiency, and output wavelength are further discussed. This work offers valuable insights into prospective candidate materials and scheme designs for the future development of high-efficiency, long-wavelength mid-infrared similar to 2.1 mu m fiber lasers.

  Addresses:[Feng, Shaohua; Zhu, Jun; Liu, Chengzhen; Xu, Yantao; Xiao, Xusheng; Guo, Haitao] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Shaanxi, Peoples R China; [Feng, Shaohua; Zhu, Jun; Liu, Chengzhen; Xu, Yantao; Xiao, Xusheng; Guo, Haitao] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China; [Shen, Yewei] Harbin Engn Univ, Key Lab Infiber Integrated Opt, Minist Educ China, Harbin 150001, Peoples R China; [Guo, Haitao] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China

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

  Publication Year:2024

  Volume:177

  Article Number:111179

  DOI Link:http://dx.doi.org/10.1016/j.optlastec.2024.111179

  数据库ID（收录号）:WOS:001244518000001
• Record 202 of
  
  Title:Advanced lead-free double perovskites/silica hybrid nanocrystals for highly stable light-emitting diodes
  
  Author Full Names:Shi, Jindou; Wang, Zeyu; Xu, Luxia; Wang, Junnan; Da, Zheyuan; Zhang, Chen; Ji, Yongqiang; Yao, Qing; Xu, Youlong; Gaponenko, Nikolai V.; Tian, Jinshou; Wang, Minqiang

  Source Title:JOURNAL OF MATERIALS CHEMISTRY C

  Language:English

  Document Type:Article

  Keywords Plus:STABILITY

  Abstract:The commercial viability of fluorescent materials is critically contingent on their thermal stability. Recent interest has converged on lead-free double perovskites (DPs), renowned for their optical properties mirroring those of traditional lead-based counterparts and superior atmospheric stability. However, these materials encounter significant fluorescence degradation in thermal environments, a challenging scenario given the high temperatures endemic to the surfaces of optoelectronic devices during prolonged operation, detrimentally impacting the fluorescent attributes of lead-free DPs. To address this challenge, in situ synthesis of lead-free DP nanocrystals (NCs) within KIT-6 mesoporous molecular sieves is proposed, yielding Cs2AgIn0.98Bi0.02Cl6@KIT-6 NCs with enhanced optical qualities. Experimental results demonstrate a marked enhancement in the fluorescence thermal stability of these NCs, attributed to the protective KIT-6 shell layer. Subjected to high power operation (100 mA) for 270 minutes, the fabricated orange light-emitting diode (LED) device maintained 80% of initial luminous efficiency, despite the resultant elevated surface temperature of 326.8 K. Therefore, this novel in situ assembly approach significantly bolsters the operational stability of lead-free DPs, paving the way for their potential commercial applications. Cs2AgIn0.98Bi0.02Cl6@KIT-6 NCs were obtained by in situ assembly within KIT-6 mesoporous molecular sieves, and their fluorescence thermal stability was significantly improved benefiting from the protection of the KIT-6 shell layer.

  Addresses:[Shi, Jindou; Wang, Junnan; Da, Zheyuan; Zhang, Chen; Ji, Yongqiang; Yao, Qing; Xu, Youlong; Wang, Minqiang] Xi An Jiao Tong Univ, Key Lab Minist Educ, Elect Mat Res Lab, Int Ctr Dielect Res, Xian 710049, Peoples R China; [Shi, Jindou; Wang, Junnan; Da, Zheyuan; Zhang, Chen; Ji, Yongqiang; Yao, Qing; Xu, Youlong; Wang, Minqiang] Xi An Jiao Tong Univ, Shannxi Engn Res Ctr Adv Energy Mat & Devices, Xian 710049, Peoples R China; [Wang, Zeyu] Xi An Jiao Tong Univ, Frontier Inst Sci & Technol FIST, Xian 710049, Peoples R China; [Wang, Zeyu] Xi An Jiao Tong Univ, Micro & Nanotechnol Res Ctr, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R China; [Xu, Luxia; Tian, Jinshou] Xi An Inst Opt & Precis Mech, Xian 710119, Shaanxi, Peoples R China; [Gaponenko, Nikolai V.] Belarusian State Univ Informat & Radioelect, P Browki 6, Minsk 220013, BELARUS

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

  Publication Year:2024

  Volume:12

  Issue:29

  Start Page:11051

  End Page:11059

  DOI Link:http://dx.doi.org/10.1039/d4tc00585f

  数据库ID（收录号）:WOS:001232950100001
• Record 203 of
  
  Title:Linear-space-variant model for Fourier ptychographic microscopy
  
  Author Full Names:Feng, Tianci; Wang, Aiye; Wang, Zhiping; Liao, Yizheng; Pan, An

  Source Title:OPTICS LETTERS

  Language:English

  Document Type:Article

  Abstract:Fourier ptychographic microscopy (FPM) needs to realize well-accepted reconstruction by image segmentation and discarding problematic data due to artifacts caused by vignetting. However, the imaging results have long suffered from uneven color blocks and the consequent digital stitching artifacts, failing to bring satisfying experiences to researchers and users over the past decade since the invention of FPM. In fact, the fundamental reason for vignetting artifacts lies in that the acquired data does not match the adopted linear-space-invariant (LSI) forward model, i.e., the actual object function is modulated by a quadratic phase factor during data acquisition, which has been neglected in the advancement of FPM. In this Letter, we rederive a linear-space-variant (LSV) model for FPM and design the corresponding loss function for FPM, termed LSV-FPM. Utilizing LSV-FPM for optimization enables the efficient removal of wrinkle artifacts caused by vignetting in the reconstruction results, without the need of segmenting or discarding images. The effectiveness of LSV-FPM is validated through data acquired in both 4f and finite conjugate

  Addresses:[Feng, Tianci; Wang, Aiye; Wang, Zhiping; Liao, Yizheng; Pan, An] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Feng, Tianci; Wang, Aiye; Liao, Yizheng; Pan, An] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Wang, Zhiping] Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Gansu, Peoples R China

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

  Publication Year:2024

  Volume:49

  Issue:10

  Start Page:2617

  End Page:2620

  DOI Link:http://dx.doi.org/10.1364/OL.522745

  数据库ID（收录号）:WOS:001239271900004
• Record 204 of
  
  Title:Forming quality optimization of 2219 aluminum alloy thin-walled complex components based on fracture constraint in spin forming
  
  Author Full Names:Li, Rui; Zheng, Zebang; Zhao, Tao; Liu, Qi; Yu, Zhenyang; Zhang, Hongrui

  Source Title:INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY

  Language:English

  Document Type:Article

  Keywords Plus:STRESS; DAMAGE; EVOLUTION; MODEL

  Abstract:The 2219 aluminum alloy thin-walled complex components manufactured by spin forming are frequently applied to the bottom end of rocket fuel tanks. However, fracture and quality problems (large part-mold contact gap, low roundness, thickness accuracy) are prone to occur during their multi-pass spin forming. While the material anisotropy, complicated components geometry and the complex stress state evolution make it difficult to obtain the appropriate forming process parameters in spin forming. With the help of finite element methods, it is possible to solve this difficulty. Thus, based on the anisotropic Barlat89 yield function and the DF2016 fracture criterion, a spin forming finite element model considering material anisotropy and damage evolution is established first for the components. Then, a method by using multi-pass involute spinning track with variable diameter base circle to form the components is proposed, and also the spinning passes are determined. Finally, taking the non-fracture as the constraint condition and the forming quality indexes (part-mold contact gap, roundness, and thickness accuracy) as the optimization objectives, a multi-objective optimization model based on orthogonal experimental design and response surface model is established. The optimized process parameters are solved and determined by a combination of the Archive-Based Micro Genetic Algorithm, and the optimized results are verified by the experiments.

  Addresses:[Li, Rui; Yu, Zhenyang] Tiangong Univ, Sch Mech Engn, Tianjin 300387, Peoples R China; [Zheng, Zebang] Northwestern Polytech Univ, Sch Mat Sci & Engn, Shaanxi Key Lab High Performance Precis Forming T, Xian 710072, Peoples R China; [Zhao, Tao] Shanghai Spaceflight Precis Machinery Inst, Shanghai 201600, Peoples R China; [Liu, Qi] Beijing Hangxing Machinery Manufacture Ltd Corp, Beijing 100013, Peoples R China; [Zhang, Hongrui] Chinese Acad Sci, Inst Opt & Precis Mech, Xian 710119, Peoples R China

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

  Publication Year:2024

  Volume:133

  Issue:1-2

  Start Page:433

  End Page:450

  DOI Link:http://dx.doi.org/10.1007/s00170-024-13759-6

  数据库ID（收录号）:WOS:001223487300004