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5th International Conference on Optoelectronic science and Materials, ICOSM 2023

作者： Liu, Hang Liu, Shixin Shi, Xinlei Feng, Lingfan Feng, Yujun Peng, Wanjing Sun, Yinhong Zhao, Zhigang Tang, Chun Institute of Applied Electronics China Academy of Engineering Physics Mianyang621900 China Key Library of Science and Technology on High Energy Laser of CAEP Mianyang621900 China The Graduate School of China Academy of Engineering Physics Beijing100088 China Key Laboratory of Laser & Infrared System Ministry of Education Shandong University Qingdao266237 China

ISBN: (纸本)9781510674547

In this paper, we investigated the SBS suppression potential in a fiber amplifier with both cylindrical vector beam output and nonlinear spectral compression method applied. By applying different kinds of modes output and different spectral management schemes, the SBS threshold of a same fiber amplifier was measured to be 67 W, 95 W and 104 W. These schemes correspond to LP01 mode output with spectrum maintained, TM01 mode output with spectrum maintained and TM01 mode output with spectrum narrowed, respectively. Experimental results indicated that the SBS threshold of our fiber amplifier with cylindrical vector beam output and spectrum compressed can be enhanced by 1.56 times, comparing to the traditional Gaussian beam one. The combination of the two techniques can pave the way for mitigating the SBS effect in high-power narrow-linewidth fiber amplifiers. © 2024 SPIE.

关键词： Fiber amplifiers

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Crystallization kinetics of Sb nanocomposite phase-change materials with strong oxide doping

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Ceramics International 2025年

作者： Fan, Ce Gu, Zhaofeng Wang, Jun-Qiang Shen, Xiang Chen, Yimin Department of Microelectronic Science and Engineering School of Physical Science and Technology Ningbo University Ningbo315211 China Laboratory of Infrared Material and Devices & Key Laboratory of Photoelectric Materials and Devices of Zhejiang Province Advanced Technology Research Institute Ningbo University Ningbo315211 China CAS Key Laboratory of Magnetic Materials and Devices & Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences Ningbo315201 China

To address the issue of composition segregation in phase-change materials, we introduced a strong oxide, SiO2, into an Sb matrix to create a well-defined nanocomposite structure. Our results show that no new phases, such as the unwanted Sb2O3, form in these materials. Instead, only amorphous SiO2 and crystalline Sb phases are homogeneously distributed in the crystallized Sb-SiO2. High-Resolution Transmission Electron Microscopy clearly revealed the nanocomposite structure, demonstrating that the Sb crystal grain size decreases to several nanometers as the SiO2 content increases to approximately 30 at.%. This reduction in grain size is accompanied by enhanced thermal properties, including a crystallization temperature of 201 °C and a ten-year data retention temperature of 133 °C. We further investigated the tailorable fragile-to-strong crystallization kinetics of these nanocomposites and discovered an ultra-large fragile-to-strong magnitude of 4.63. This unique kinetic behavior results in a coexistence of fast crystal growth rates near the melting temperature (with a maximum rate of 2.93 m s−1 at 800 K) and excellent thermal stability near the glass transition temperature (with a rate of 4 × 10−9 m s−1 at 500 K). The significant difference in crystal growth rates only over a narrow temperature range is attributed to the distinct fragile-to-strong kinetics observed in the Sb-SiO2 nanocomposite. These characteristics make it a promising candidate for next-generation persistent phase-change applications, where both rapid switching and long-term data retention are essential. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Crystallization kinetics

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Design and fabrication of HgCdTe linear avalanche devices with low gain normalized dark current density 3

Design and fabrication of HgCdTe linear avalanche devices wi...

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3rd International Computing Imaging Conference, CITA 2023

作者： Xie, Hao Guo, Huijun Shen, Chuan Yang, Liao Chen, Lu He, Li Key Laboratory of Infrared Imaging Materials and Detectors Shanghai Institute of Technical Physics Chinese Academy of Science No. 500 Yu Tian Road Shanghai200083 China School of Information Science and Technology ShanghaiTech University No. 393 Huaxia Middle Road Shanghai201210 China

ISBN: (纸本)9781510671409

Mid-wavelength infrared (MWIR) HgCdTe electron-initiated avalanche photodiodes (e-APDs) have presented excellent performances to resolve and count photons. Aiming at low flux, the readout integrated circuit (ROIC) noise can be extremely reduced by certain device gain, and very low excess noise of HgCdTe e-APDs makes opportunity for noise equivalent photon (NEPh) to be 1. Therefore, the main issue for signal-to-noise ratio (SNR) of HgCdTe APD is gain normalized dark current density (GNDCD) at high reverse bias. In this work, The electric field distribution is optimized by designing the mesa device structure to suppress the tunneling current at high operating voltage. Furthermore, new combining dry/wet etching technology and passivation technology based on plasma atomic enhanced layer deposition (PEALD) were used to reduce surface leakage current. Finally, 20μm pitch 128×128 array HgCdTe APDs for cut-off wavelengths 4.32µm @80K corresponding to compositions xcd 0.326 were fabricated, the measured GNDCD of test unit is about 1.5~50×10-9 A/cm2 at 0~13V. © 2023 SPIE.

关键词： Signal to noise ratio

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Design and fabrication of GeAsSeS chalcogenide waveguides with thermal annealing

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Chinese Physics B 2021年第3期30卷 320-325页

作者： Limeng Zhang Jinbo Chen Jierong Gu Yixiao Gao Xiang Shen Yimin Chen Tiefeng Xu Laboratory of Infrared Materials and Devices&Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province Research Institute of Advanced TechnologyNingbo UniversityNingbo 315211China Ningbo Institute of Oceanography Ningbo 315832China Department of Microelectronic Science and Engineering School of Physical Science and TechnologyNingbo UniversityNingbo 315211China

We reported a chalcogenide glass-based rib waveguide fabricated using photolithography and dry etching method. A commercial software(COMSOL Multiphysics) was used to optimize the waveguide structure and the distribution of the fundamental modes in the waveguide based on the complete vector finite component. We further employed thermal annealing to optimize the surface and sidewalls of the rib waveguides. It was found that the optimal annealing temperature for Ge As Se S films is 220℃, and the roughness of the films could be significantly reduced by annealing. The zero-dispersion wavelength(ZDW) could be shifted to a short wavelength around ~2.1 μm via waveguide structural optimization, which promotes supercontinuum generation with a short wavelength pump laser source. The insertion loss of the waveguides with cross-sectional areas of 4.0 μm×3.5 μm and 6.0 μm×3.5 μm was measured using lens fiber and the cut-back method. The propagation loss of the 220℃ annealed waveguides could be as low as 1.9 d B/cm at 1550 nm.

关键词： chalcogenide film dispersion engineering optical waveguide thermal annealing

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Wavelength-dependent nonlinear wavefront shaping in 3D nonlinear photonic crystal

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Chinese Optics Letters 2024年第7期22卷 66-70页

作者： Yunze Wang Yan Sheng Shan Liu Ruwei Zhao Tianxiang Xu Tiefeng Xu Feng Chen Wieslaw Krolikowski Laboratory of Infrared Materials and Devices Research Institute of Advanced TechnologiesNingbo UniversityNingbo 315211China Engineering Research Center for Advanced Infrared Photoelectric Materials and Devices of Zhejiang Province Ningbo UniversityNingbo 315211China Quantum Science and Technology Research School of PhysicsAustralian National UniversityCanberraACT 2601Australia Ningbo Institute of Oceanography Ningbo 315832China State Key Laboratory of Crystal Materials and Key Laboratory of Particle Physics and Particle Irradiation of the Ministry of Education School of PhysicsShandong UniversityJinan 250100China

A 3D nonlinear photonic crystal containing four parallel segments of periodicχ^((2))grating structure is fabricated employing the femtosecond laser poling of ferroelectric Ca_(0.28)Ba_(0.72)Nb_(2)O_(6) *** second harmonic generation from this foursegment structure is studied with a fundamental Gaussian *** tuning the wavelength of the fundamental wave,the second harmonic varies from the Laguerre-Gaussian beam(topological charge l_(c)=1)to the higher-order Hermite-Gaussian beam and Laguerre-Gaussian again(l_(c)=−1).This effect is caused by the wavelength-dependent phase delays introduced by the four-grating *** study contributes to a deeper understanding of nonlinear wave interactions in 3D nonlinear photonic *** also offers new possibilities for special beam generation at new frequencies and their control.

关键词： quasi-phase matching nonlinear photonic crystal second harmonic generation nonlinear beam shaping

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Low-loss Ge-As-S glass fiber for high-power Er:YAG laser transmission and ablation

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Optics Express 2025年第10期33卷 20370-20382页

作者： Liang, Xiaolin Wang, Yuyang Jiao, Kai Wang, Xiange Xu, Weisheng Bai, Shengchuang Zhao, Zheming Wang, Rongping Li, Pingxue Shiryaev, Vladimir Wang, Xunsi Laboratory of Infrared Materials and Devices Advanced Technology Research Institute Ningbo University Ningbo315211 China Zhejiang Key Laboratory of Photoelectric Materials and Devices Ningbo315211 China Faculty of Electrical Engineering and Computer Science Ningbo University Ningbo315211 China College of Information and Intelligence Engineering Zhejiang Wanli University Ningbo315000 China College of Data Science Jiaxing University 314001 China Faculty of Materials and Manufacturing Beijing University of Technology Beijing100124 China Devyatykh Institute of Chemistry of High-Purity Substances Russian Academy of Sciences 49 Tropinin Str. Nizhny Novgorod603951 Russia

Ge-based chalcogenide glass fibers exhibit a high damage threshold and exceptional water stability, making them an ideal material for transmitting Er: YAG laser beams. However, the problem of particle scattering in the current glass poses formidable challenge to the transmission of high-power Er: YAG lasers. In this study, we introduce what we believe to be a novel approach to mitigate internal scattering by employing a micron-scale filter in combination with a multi-stage dynamic distillation process, effectively extending the purity limits of Ge-CHG fibers. The loss of Ge-As-S glass has achieved a record of 0.1 dB/m by reducing the internal particle scattering. In addition, the Ge-As-S optical fiber prepared by the isolation extrusion method also exhibits excellent performance in the transmission of Er: YAG laser. The Ge-As-S fiber rod with a core diameter of approximately 750 µm can sustain a laser power of 13.43 W at wavelength of 2.94 µm, i.e., energy density of 684 J/cm2 under atmosphere surrounding. To enhance flexibility, the fiber rod was tapered to gradually reduce its diameter, achieving a core diameter of 300 µm at the narrow end. The flexible Ge-As-S fiber achieved a maximum power output of 4.1 W with an energy density of 580 J/cm2. To our knowledge, this is the first instance of a chalcogenide fiber handling Er: YAG laser power exceeding 5 W flexibly. Finally, we demonstrated the capability of the flexible optical fiber to transmit Er: YAG laser energy for biological tissue ablation, achieving a cutting depth of 3 mm. These results highlight the potential of Ge-As-S fibers as a promising platform for high-power mid-infrared laser transmission, with significant applications in minimally invasive surgery procedures. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Laser surgery

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Surface-patterned chalcogenide glasses with high-aspect-ratio microstructures for long-wave infrared metalenses

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Opto-Electronic science 2024年第10期3卷 1-13页

作者： Zhaofeng Gu Yixiao Gao Kongsi Zhou Junyang Ge Chen Xu Lei Xu Mohsen Rahmani Ran Jiang Yimin Chen Zijun Liu Chenjie Gu Yaoguang Ma Jianrong Qiu Xiang Shen Laboratory of Infrared Materials and Devices Research Institute of Advanced TechnologiesNingbo UniversityNingbo 315211China Zhejiang Key Laboratory of Advanced Optical Functional Materials and Devices Ningbo 315211China Advanced Optics&Photonics Laboratory Department of EngineeringSchool of Science and TechnologyNottingham Trent UniversityNottingham NG118NSUnited Kingdom Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingbo 315211China State Key Laboratory of Extreme Photonics and Instrumentation College of Optical Science and EngineeringInternational ResearchCenter for Advanced PhotonicsZhejiang UniversityHangzhou 310027China Ningbo Institute of Oceanography Ningbo 315832China

Multidimensional-engineering chalcogenide glasses is widely explored to construct various infrared photonic devices,with their surface as a key dimension for wavefront ***,we demonstrate direct patterning high-aspect-ratio microstructures on the surface of chalcogenide glasses offers an efficient and robust method to manipulate longwave infrared *** chalcogenide glass being considered soft in terms of its mechanical properties,we successfully fabricate high-aspect-ratio micropillars with a height of 8μm using optimized deep etching process,and we demonstrate a 2-mm-diameter all-chalcogenide metalens with a numerical aperture of 0.45 on the surface of a 1.5-mm-thick As2Se3 *** the exceptional longwave infrared(LWIR)transparency and moderate refractive index of As2Se3 glass,the all-chalcogenide metalens produces a focal spot size of~1.39λ0 with a focusing efficiency of 47%at the wavelength of 9.78μm,while also exhibiting high-resolution imaging *** work provides a promising route to realize easy-to-fabricate,mass-producible planar infrared optics for compact,light-weight LWIR imaging systems.

关键词： chalcogenide glasses long wave infrared metalens

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Strain-enhanced dynamic regulation of chiroptical responses in 3D suspended nested metamaterials

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Optics Express 2025年第11期33卷 23440-23451页

作者： Bo Li ShiLong Duan QiuShun Zou RuanSheng Guo YiMin Chen ChenJie Gu PeiQing Zhang Xiang Shen Faculty of Electrical Engineering and Computer Science Ningbo University Ningbo 315211 China Laboratory of Infrared Material and Devices Zhejiang Key Laboratory of Advanced Optical Functional Materials and Devices Advanced Technology Research Institute Ningbo University Zhejiang 315211 China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern Mechanics University of Science and Technology of China Hefei Anhui 230027 China

Three-dimensional (3D) chiral metamaterials, which exhibit strong chiroptical responses, have attracted tremendous attention in the broad fields of next-generation photonic devices and chiroptical spectroscopy techniques. There is an urgent need for a novel fabrication approach that enables the rapid and straightforward preparation of 3D chiral nanostructures, along with a robust strategy for achieving dynamic regulation. Here, we proposed a strain-enhanced strategy for dynamically regulating the chiroptical responses of 3D suspended nested metamaterials from the transformation of a 2D precursor. The local strain enhancement could effectively resolve the bottleneck of insufficient strain and low precision for the buckling strain self-assembly. The changing morphology and circular dichroism (CD) of 3D suspended chiral metamaterials were analyzed under the impact of a strain-enhanced effect. Then, the uplifted heights of these 3D nanostructures increased with the substrate's pre-strain ( ɛ pre ). Its CD reached up to 0.79, mainly resulting from ring electric dipoles. Interestingly, the chiroptical responses of 3D nanopyramids were regulated dynamically by controlling the substrate's pre-strain. Such a strategy provides a new pathway for achieving high-performance chiral metamaterials and offers promising applications in circularly polarized light detection, super-chiral light sources, optical communication, and advanced nanophotonic systems.

关键词： Holographic displays Luminescent materials Negative index materials Optical properties Photonic devices Refractive index

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Ferroelectricity of pristine Hf_(0.5)Zr_(0.5)O_(2) films fabricated by atomic layer deposition

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Chinese Physics B 2023年第10期32卷 684-688页

作者：陈璐秋张晓旭冯光迪刘逸飞郝胜兰朱秋香冯晓钰屈可杨振中祁原深 Yachin Ivry Brahim Dkhil 田博博褚君浩段纯刚 Key Laboratory of Polar Materials and Devices(MOE) Ministry of EducationShanghai Center of Brain-inspired Intelligent Materials and DevicesDepartment of ElectronicsEast China Normal UniversityShanghai 200241China Zhejiang Laboratory Hangzhou 310000China Guangdong Provisional Key Laboratory of Functional Oxide Materials and Devices Southern University of Science and TechnologyShenzhen 518055China Department of Materials Sciences and Engineering Guangdong Technion-Israel Institute of TechnologyShantou 515063China Department of Materials Science and Engineering Solid-State InstituteTechnion-Israel Institute of TechnologyHaifa 3200003Israel UniversitéParis-Saclay CentraleSupélecCNRS-UMR 8580Laboratoire StructuresPropriétés et Modélisation des SolidesGif-sur-Yvette 91190France State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China Institute of Optoelectronics Fudan UniversityShanghai 200433China Collaborative Innovation Center of Extreme Optics Shanxi UniversityShanxi 030006China

Hafnium-based ferroelectric films,remaining their ferroelectricity down to nanoscale thickness,present a promising application for low-power logic devices and nonvolatile *** has been appealing for researchers to reduce the required temperature to obtain the ferroelectric phase in hafnium-based ferroelectric films for applications such as flexible and wearable *** work demonstrates that a remanent polarization(P_(r))value of>5μC/cm^(2)can be obtained in asdeposited Hf_(0.5)Zr_(0.5)O_(2)(HZO)films that are fabricated by thermal atomic layer deposition(TALD)under low temperature of 250℃.The ferroelectric orthorhombic phase(o-phase)in the as-deposited HZO films is detected by scanning transmission electron microscopy(STEM).This low fabrication temperature further extends the compatibility of ferroelectric HZO films to flexible electronics and avoids the cost imposed by following high-temperature annealing treatments.

关键词： Hf_(0.5)Zr_(0.5)O_(2)(HZO) ferroelectric orthorhombic without annealing

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Study on multi-wavelength thin film thickness determination method

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红外与毫米波学报 2024年第6期43卷 813-819页

作者： SHI Ce XIE Mao-Bin ZHENG Wei-Bo JI Ruo-Nan WANG Shao-Wei LU Wei School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China State Key Laboratory of Infrared Physics Shanghai Institute of Technical PhysicsChinese Academy of SciencesShanghai 200083China Shanghai Engineering Research Center of Energy-Saving Coatings Shanghai 200083China Shanghai Key Laboratory of Optical Coatings and Spectral Modulation Shanghai 200083China Shanghai Institute of Technical Physics Chinese Academy of SciencesShanghai 200083China

This work introduces a novel method for measuring thin film thickness,employing a multi-wavelength method that significantly reduces the need for broad-spectrum *** traditional techniques that require sev⁃eral hundred spectral data points,the multi-wavelength method achieves precise thickness measurements with data from only 10 *** innovation not only simplifies the process of spectral measurement analysis but also enables accurate real-time thickness measurement on industrial coating production *** method effectively reconstructs and fits the visible spectrum(400-800 nm)using a minimal amount of data,while maintaining measurement error within 7.1%.This advancement lays the foundation for more practical and efficient thin film thickness determination techniques in various industrial applications.

关键词： film thickness determination transmittance and reflectance spectra fitting spectral reconstruction

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