2025

• Record 49 of
  
  Title:Infrared microlens formation on chalcogenide polymer surface via femtosecond laser pulse ablation
  
  Author Full Names:Liu, Feng; Li, Xianda; Yu, Longyuan; Zhang, Xiaomo; Li, Peng; Liu, Sheng; Zhang, Jiwei; Gan, Xuetao; Li, Weinan; Wang, Pengfei; Zhu, Xiangping; Zhao, Jianlin

  Source Title:OPTICS AND LASER TECHNOLOGY

  Language:English

  Document Type:Article

  Keywords Plus:ELEMENTAL SULFUR; GLASS

  Abstract:In this study, we introduced micro-optical surface formation via femtosecond (fs) laser pulse scanning to chalcogenide polymer (ChP), a promising material for costeffective infrared applications. Employing this method, we successfully fabricated a large-area poly(sulfur-random-(1,3-diisopropenylbenzene)) (S-r-DIB) r-DIB) microlens array (MLA) component. Each micro-concave spherical surface was crafted with a single fs laser pulse, serving as a micro-concave lens surface. We achieved a quasi- periodic MLA sample with over 2 x 105 5 micro-lenslets within a 10 mm x 10 mm footprint. Additionally, precise locating of laser pulse irradiation enabled us to create a hexagonal MLA with a filling factor over 37 %. Morphological investigations and imaging tests confirmed the adequate surface quality of the fabricated components, with its uniformity revealed by the virtual foci grid in near infrared region. To elucidate the forming conditions and mechanisms, we studied the evolution of surface morphology under various laser irradiation conditions. Laser induced damage thresholds of S70-r-DIB30 70- r-DIB 30 were experimentally determined for both 800 nm and 400 nm wavelengths under single- and multi-pulse irradiation scenarios. We identified the optimal fabrication fluence window as 115-205 mJ/cm2 2 with 800 nm single-pulse irradiation. The bandgap of the S70-r-DIB30 70- r-DIB 30 was estimated as 2.06 eV, and energy band analysis confirmed distinctions in ablation morphology. Furthermore, we investigated sub-surface morphology evolution using orthogonal ultrafast pump-probe imaging, revealing diversity compared to traditional inorganic and polymeric optical materials due to differing absorption and etching mechanisms. The elastic wave velocity of 3.2 km/s in this ChP and etching velocity of 0.7 mu m/pulse were experimentally determined. These findings deepen our understanding of ChP material interaction with fs lasers, offering insights for potential applications such as surface engineering, substrate cutting, and micro-structure formation.

  Addresses:[Liu, Feng; Yu, Longyuan; Li, Peng; Liu, Sheng; Zhang, Jiwei; Gan, Xuetao; Zhao, Jianlin] Northwestern Polytech Univ, Key Lab Light Field Manipulat & Informat Acquisit, Shaanxi Key Lab Opt Informat Technol, Minist Ind & Informat Technol,Sch Phys Sci & Techn, Xian 710129, Peoples R China; [Li, Xianda; Zhang, Xiaomo; Li, Weinan; Wang, Pengfei; Zhu, Xiangping] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China

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

  Publication Year:2025

  Volume:181

  Article Number:111679

  DOI Link:http://dx.doi.org/10.1016/j.optlastec.2024.111679

  数据库ID（收录号）:WOS:001301574600001
• Record 50 of
  
  Title:Fabrication of Sb2S3@In2Se3 heterojunction photocathodes with [hk1] dominant orientation towards photoelectrochemical water splitting
  
  Author Full Names:Ma, Zhen; Wei, Xueling; Yang, Yuanhao; Li, Qiujie; Wang, Yishan; Liu, Enzhou; Miao, Hui

  Source Title:SEPARATION AND PURIFICATION TECHNOLOGY

  Language:English

  Document Type:Article

  Keywords Plus:SOLAR-CELL; THIN-FILMS; CONSTRUCTION; HETEROSTRUCTURE; PERFORMANCE; TRANSPORT

  Abstract:Nowadays, energy shortage and environmental problems are gradually becoming a pressing issue, so the development of environmentally friendly energy has attracted the attention of a large number of researchers. In this work, Sb2S3 nanorods (NRs) with [hk1] dominant orientation were prepared by vapor transport deposition (VTD) method to form a fast carrier transport channel. Then, In2Se3 was coated on the surface of Sb2S3 using lowcost Na2SeSO3 as the selenium source, while retaining the dominant orientation of Sb2S3. The formed type-II Sb2S3@In2Se3-annealed heterojunction with quasi-one-dimensional rod-like structure could effectively facilitate the carrier separation and transportation. To some extent, it weakens the drawbacks of severe recombination of photogenerated carriers due to deep energy level defects in Sb2S3. The photocurrent density of the composite photocathode under 0 V vs. RHE is about 2.9 mA/cm2, which is 22 times higher than that of the pure Sb2S3 monomer, and results in the effective inhibition of the dark current and transient spikes of the Sb2S3 monomer. It shows good stability in the switching light test within 210 s, small charge transfer resistance, and high charge separation and injection efficiency. In a word, this study provides a new insight into the preparation of Sb2S3 based quasi-one-dimensional heterojunction via the VTD process combined in-situ hydrothermal method to obtain promising photoelectrochemical (PEC) water splitting photoelectrodes.

  Addresses:[Ma, Zhen; Wei, Xueling; Yang, Yuanhao; Li, Qiujie; Miao, Hui] Northwest Univ, Sch Phys, Xian 710127, Peoples R China; [Wang, Yishan] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China; [Liu, Enzhou] Northwest Univ, Sch Chem Engn, Xian 710127, Peoples R China

  Affiliations:Northwest University Xi'an; Chinese Academy of Sciences; State Key Laboratory of Transient Optics & Photonics; Northwest University Xi'an

  Publication Year:2025

  Volume:354

  Article Number:129135

  DOI Link:http://dx.doi.org/10.1016/j.seppur.2024.129135

  数据库ID（收录号）:WOS:001295752100001
• Record 51 of
  
  Title:Deep full-color optically-sectioned microscopy with multi-reference colorization
  
  Author Full Names:Bai, Chen; Dang, Shipei; Qian, Jia; Tian, Xuan; Li, Runze; Peng, Tong; Li, Xing; Yang, Yanlong; Dan, Dan; Yao, Baoli

  Source Title:OPTICS AND LASER TECHNOLOGY

  Language:English

  Document Type:Article

  Keywords Plus:CELLS; LIGHT

  Abstract:As the wide-field microscopy, structured illumination microscopy (SIM) enables optical sectioning (OS) and super-resolution imaging, having the advantages of high spatial resolution, short image recording time, and less photobleaching and phototoxicity. With white light illumination, full-color SIM technology based on the huesaturation-value (HSV) color space, namely HSV-SIM, can restore the color information of the sample surface, which is an important physical quantity describing the characteristics of living creatures and their optical properties. Nevertheless, fringes are inevitably left in the processing channel, especially in the hue (H) and saturation (S) channels, leading to color distortion as well as oversaturation and excessive redness. Besides, HSVSIM requires the OS algorithm to run three times in each channel and requires two transformations between the red-green-blue (RGB) and HSV color spaces, thereby extending the data processing time for large-scale samples. In this paper, a natural color SIM method is proposed through deep learning with multi-reference-based colorization, called Deep-MRC-SIM, which can effectively reconstruct high-quality full-color OS images with improved color authenticity and richness. In addition to taking the corresponding WF image with same scanning depth as a reference, Deep-MRC-SIM also introduces other WF data at two random depths as references. This makes DeepMRC-SIM more robust and precise for natural color SIM with such three multi-WF references. Case studies of different specimens with a specific digital micro-mirror device (DMD)-based SIM system are used to validate this method. Regarding the color rendition, the image histogram cosine similarity and structural similarity of DeepMRC-SIM were on average 7.67 and 2.10 times better than those of HSV-SIM, respectively; Meanwhile, the reconstruction time was reduced by 69.24%. This cost-effective and convenient Deep-MRC-SIM method offers a promising tool to observe the 3-D distribution of color biological samples with high precision.

  Addresses:[Bai, Chen; Dang, Shipei; Qian, Jia; Tian, Xuan; Li, Runze; Peng, Tong; Li, Xing; Yang, Yanlong; Dan, Dan; Yao, Baoli] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Bai, Chen; Dang, Shipei; Tian, Xuan; Dan, Dan; Yao, Baoli] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Yao, Baoli] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, 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; Shanxi University

  Publication Year:2025

  Volume:180

  Article Number:111577

  DOI Link:http://dx.doi.org/10.1016/j.optlastec.2024.111577

  数据库ID（收录号）:WOS:001293398500001
• Record 52 of
  
  Title:Long-term repetition rate stabilization of soliton microcomb using optical closed-loop injection locking
  
  Author Full Names:Wang, Zhichuang; Shi, Lei; Hu, Xiaohong; Little, Brent E.; Chu, Sai T.; Wang, Weiqiang; Zhang, Wenfu

  Source Title:OPTICS AND LASER TECHNOLOGY

  Language:English

  Document Type:Article

  Keywords Plus:FREQUENCY

  Abstract:We demonstrate an optical closed-loop injection locking technology for the soliton microcomb repetition rate (frep) stabilization. Using the power of the -1st comb line (-1st represents the first comb tooth on the left side of the pump laser) as an error signal, the pump laser frequency is auto-tuned to ensure frep locked at an optimal level. After injection locking for 2 h, the single-sideband (SSB) phase noise of the closed-loop locked frep decreases by 20 dB compared with the open-loop locked frep within the offset frequency range of 20 Hz to 30 kHz. After locking one and a half hours, the Allan deviation of the closed-loop locked frep reaches 1.8 x 10-13@0.1 s, which improves by three orders of magnitude. The experimental results prove the feasibility of the optical closed-loop injection technology for long-term frep stabilization. The proposed scheme has excellent locking performance, simple structure and low cost, which has the potential application for stable microwave generation, precision ranging, etc.

  Addresses:[Wang, Zhichuang; Shi, Lei; Hu, Xiaohong; Little, Brent E.; Zhang, Wenfu] Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Peoples R China; [Wang, Zhichuang; Shi, Lei; Hu, Xiaohong; Zhang, Wenfu] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Chu, Sai T.] City Univ Hong Kong, Dept Phys, Hong Kong, Peoples R China; [Wang, Weiqiang] Shaanxi Univ Sci & Technol, Sch Elect Informat & Artificial Intelligence, Xian 710021, 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; City University of Hong Kong; Shaanxi University of Science & Technology

  Publication Year:2025

  Volume:180

  Article Number:111549

  DOI Link:http://dx.doi.org/10.1016/j.optlastec.2024.111549

  数据库ID（收录号）:WOS:001287531000001
• Record 53 of
  
  Title:A cascade SPR sensor based on Ag/Au coated coreless optical fiber for RI and pH measurement
  
  Author Full Names:Hu, Linchuan; Li, Jianshe; Yin, Zhiyong; Zhang, Zhibing; Li, Hongwei; Li, Shuguang; Wang, Peng; Du, Huijing; Wang, Ruiduo

  Source Title:OPTICS AND LASER TECHNOLOGY

  Language:English

  Document Type:Article

  Abstract:Due to the restriction of resonant wavelength, the detection range of traditional two-parameter sensors is greatly limited. To solve this problem, a cascade SPR sensor with Ag/Au coating is proposed to measure refractive index (RI) and pH value. In this paper, coreless optical fiber is used as the sensor probe, and Ag/Au are coated on its surface by a magnetron sputtering method. The two sensing channels of this cascade sensor are independent of each other and have a wide parameter detection range. The effects of sensor length and coating time on the performance of the sensor were investigated, and the optimal sensor length and coating time were determined. The experimental results show that the maximum refractive index sensitivity is 3888.6 nm /RIU in the RI range of 1.333-1.385, and the maximum pH sensitivity is 38.01 nm/pH in the pH range of 3.15-8.86. The sensor has the advantages of strong stability and high integration and has a good application prospect in the fields of biosensing and environmental detection.

  Addresses:[Hu, Linchuan; Li, Jianshe; Yin, Zhiyong; Zhang, Zhibing; Li, Hongwei; Li, Shuguang; Du, Huijing] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China; [Wang, Peng] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China; [Wang, Ruiduo] Chinese Acad Sci, Xian Inst Opt & Precis Mech, State Key Lab Transient Opt & Photon, Xian 710119, Peoples R China

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

  Publication Year:2025

  Volume:180

  Article Number:111452

  DOI Link:http://dx.doi.org/10.1016/j.optlastec.2024.111452

  数据库ID（收录号）:WOS:001271761300001
• Record 54 of
  
  Title:Global Cross-Attention Network for Single-Sensor Multispectral Imaging
  
  Author Full Names:Yuan, Nianzeng; Li, Junhuai; Sun, Bangyong

  Source Title:IEEE TRANSACTIONS ON EMERGING TOPICS IN COMPUTATIONAL INTELLIGENCE

  Language:English

  Document Type:Article

  Keywords Plus:FILTER ARRAYS; ALGORITHM; DESIGN

  Abstract:Multispectral filter array (MSFA) imaging with one single sensor is a fast, portable, and inexpensive means of acquiring spectral images. The most challenging task for MSFA imaging is the multispectral demosaicing with the aim of reconstructing the captured raw/mosaic image, especially for the systems with many bands which results in the higher sparseness of the raw data. In this paper, a global cross-attention network (GCN) demosaicing method is proposed to excavate latent spectral characteristics to reconstruct the multispectral image. The architecture of GCN is based on the global cross-attention module, which contains a cross-transformer layer and a local self-attention module. Specifically, a global cross-attention module is proposed to fully explore intrinsic similarity characteristics in both spatial dimension and spectral dimension, non-local spatial self-attention and global spectral self-attention are conducted with Transformer architecture. Besides, the local self-attention module is utilized to enhance the effectiveness of extraction and refinement for local spatial information. Simulation experiments show that the image quality can be improved by up to 1.78 dB and the spectral similarity is significantly improved by our proposed GCN method compared to various reconstruction methods. In addition, GCN significantly reduces false color and zipper effect artifacts. Experiments using both synthetic and real data demonstrate that the proposed GCN outperforms state-of-the-art (SOTA) methods in terms of spatial and spectral fidelity.

  Addresses:[Yuan, Nianzeng; Li, Junhuai] Xian Univ Technol, Sch Comp Sci & Engn, Xian 710048, Peoples R China; [Sun, Bangyong] Xian Univ Technol, Sch Printing Packaging & Digital Media, Xian 710048, Peoples R China; [Sun, Bangyong] Xian Inst Opt & Precis Mech, Key Lab Spectral Imaging Technol China Acad Sci, Xian 710119, Peoples R China

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

  Publication Year:2025

  Volume:9

  Issue:1

  Start Page:240

  End Page:252

  DOI Link:http://dx.doi.org/10.1109/TETCI.2024.3414950

  数据库ID（收录号）:WOS:001258776900001