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The compatibly large nonlinear optical effect and high laser-induced damage threshold in a thiophosphate CsInP_(2)S_(7)constructed with[P_(2)S_(7)]^(4-)and[InS_(6)]^(9-)

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Chinese Chemical Letters 2024年第1期35卷 533-536页

作者： Mengjia Luo Xiaohui Li Xingxing Jiang Zheshuai Lin Zhengyang Zhou Nanchang Key Laboratory of Photoelectric Conversion and Energy Storage Materials Nanchang Institute of TechnologyNanchang 330099China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050China Functional Crystals Lab Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Institute of Experimental Physics Free University BerlinBerlin D-14195Germany

It is challenging to cooperatively improve the nonlinear optical(NLO)efficiency and the laser-induced damage threshold(LIDT).This work reports a novel IR NLO materials CsInP_(2)S_(7)(CIPS)designed by combination the strategies of alkali metals substitution and microscopic NLO units PS4 introduction based on AgGaS_(2).CIPS was composed of strongly distorted[InS_(6)]^(9-)octahedra and[P_(2)S_(7)]4-dimers constructed by corner-sharing[PS_(4)]^(3-),which increase the NLO efficiency and decrease thermal expansion anisotropy *** with AgGaS_(2),CIPS exhibited strong phase matchable NLO response ca.1.1×AGS@2.1μm,high LIDT ca.20.8×AgGaS_(2),and IR transparency up to 15.3μ*** analysis and theoretical investigation confirmed that large SHG effect and ultrahigh LIDT of CIPS originated from the synergistic contribution of[InS_(6)]^(9-)octahedra and[P_(2)S_(7)]*** results indicate that CIPS is a promising NLO candidate in the mid-IR region,and this study provides a new approach for developing potential NLO-LIDT compatible materials.

关键词： Infrared nonlinear optics materials A novel thiophosphate Structure design Structure-activity relationship High laser-induced damage threshold

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Elevating kinetics of passivated Fe anodes with NH_(4)Cl regulator:Toward low-cost,long-cyclic and green cathode-free Fe-ion aqueous batteries

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Nano Research 2022年第4期15卷 3187-3194页

作者： Shibo Chai Jianhui Zhu Jian Jiang Chang Ming Li School of Physical Science and Technology Southwest UniversityNo.2 Tiansheng RoadBeiBei DistrictChongqing 400715China School of Materials and Energy and Chongqing Key Lab for Advanced Materials and Clean Energies of TechnologiesSouthwest UniversityNo.2 Tiansheng RoadBeiBei DistrictChongqing 400715China Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province Key Laboratory of Functional Materials and Photoelectrochemistry of HaikouCollege of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158China

The environment benignity and battery cost are major concerns for grid-scale energy storage *** emerging dendrite-free Fe-ion aqueous batteries are promising due to the rich natural abundance,low cost and non-toxicity for Fe ***,serious passivation reactions on Fe anodes and poor long-term cyclability for matched cathodes still stand in the way for their practical *** settle above constraints,we herein use NH_(4)Cl as the electrolyte regulator to elevate the reaction kinetics of passivated Fe anodes,and also propose a special cathode-free design to prolong the cells lifetime over 1,000 *** added NH_(4)Cl can erode/break inert passivation layers and strengthen the ion conductivity of electrolytes,facilitating the reversible Fe plating/stripping and Fe^(2+)*** highly puffed nano carbon foams function as current collectors and actives anchoring hosts,enabling expedite Fe^(2+)adsorption/desorption,FeII/FeIII redox conversions and FeIII *** configured rocking-chair Fe-ion cells have good environmental benignity and decent energy-storage behaviors,including high reactivity/reversibility,outstanding cyclic stability and far enhanced operation *** economical,long-cyclic and green cathode-free Fe-ion batteries may hold great potential in near-future energy-storage power stations.

关键词： elevated kinetics passivated Fe anodes NH_(4)Cl regulator cathode-free design Fe-ion batteries

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Large low-field reversible magnetocaloric effect in K_(3)Gd(PO_(4))_(2) at sub-Kelvin temperature

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Journal of Rare Earths 2024年第6期42卷 1087-1092,I0003页

作者： Haojie Wang Zhaojun Mo Jianjian Gong Heng Tu Guochun Zhang Jun Shen School of Rare Earths University of Science and Technology of ChinaHefei230026China Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou341119China Center for Crystal Research and Development Key Laboratory of Functional Crystals and Laser TechnologyKey Laboratory of CryogenicsTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190China Department of Energy and PowerEngineering School of Mechanical EngineeringBeijing Institute of TechnologyBeijing100081China

We synthesized a potassium gadolinium phosphate K3Gd(PO_(4))_(2)with monoclinic structure(P2_(1/m))by the high-temperature solid-state reaction *** lattice constants obtained by Rietveld refinements of XRD curve are a=0.7411 nm,b=0.5624 nm,and c=0.9433 *** and magnetocaloric properties of K_(3)Gd(PO_(4))_(2)were investigated in *** magnetic phase transition temperature of K3Gd(PO_(4))2 was determined by ultra-low temperature testing to be 0.58 K.K_(3)Gd(PO_(4))2 exhibits large magnetic entropy changes(-ΔSM).The maximum-ΔSM are 20.2 and 29.4 J/(kg·K)in the magnetic field variation(ΔH)of 1 and 2 T,respectively,which are larger than that of the commercial Gd_(3)Ga_(5)O_(12)(GGG).The maximum adiabatic temperature change(ΔT_(ad))reaches 5.91 K under a magnetic field change(ΔH)of 1 T.K_(3)Gd(PO_(4))_(2)is a potential magnetic refrigeration material for obtaining sub-Kelvin temperatures.

关键词： Ultra-low temperature Magnetocaloric effect Magnetic entropy change Magnetic refrigeration Rare earths

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Narrow-linewidth BaGa_(4)Se_(7) optical parametric oscillator

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Chinese Optics Letters 2022年第4期20卷 54-59页

作者： Jintian Bian Hui Kong Qing Ye Jiyong Yao Lei Guo Xiaoquan Sun State Key Laboratory of Pulsed Power Laser Technology National University of Defense TechnologyHefei 230037China Advanced Laser Technology Laboratory of Anhui Province Hefei 230037China Key Laboratory of Functional Crystals and Laser Technology Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China School of Mechanics and Photoelectric Physics Anhui University of Science and TechnologyHuainan 232001China

The linewidth of the BaGa_(4)Se_(7)(BGSe)optical parametric oscillator(OPO)was narrowed for the first time,to the best of our knowledge,by inserting a Fabry-Perot(FP)etalon into an L-shaped *** a 15 mm long BGSe(56.3°,0°)was pumped by a 1064 nm laser,the peak wavelength was〜3529 nm,and the linewidth was 4.53 nm[3.64 cm^(-1)]under type I phase *** inserting a 350μm thick FP etalon,the linewidth was decreased to 1.27-2.05 *** the tilt angle of the etalon was 2.34°,the linewidth was 2.05 nm[1.65 cm^(-1)],and the peak wavelength was still〜3529 *** the tilt angle of the etalon was 3.90°,the peak wavelength was 3534.9 nm,and the linewidth was 1.27 nm(1.02 cm^(-1)),which was the narrowest linewidth of a BGSe OPO,to the best of our *** beam quality was also improved after inserting the FP etalon.

关键词： optical parametric oscillation narrow linewidth BaGa_(4)Sc_(7)

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Ga(Io3)3: A Mid-Ir Nonlinear Optical Iodate with Balanced Performance between Band Gap and Second Harmonic Generation Response

SSRN

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SSRN 2023年

作者： Wang, Dandan Zhang, Xinyuan Gong, Pifu Lin, Zheshuai Hu, Zhanggui Wu, Yicheng Tianjin Key Laboratory of Functional Crystal Materials Institute of Functional Crystals Tianjin University of Technology Tianjin300384 China Functional Crystals Lab Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing100190 China

The balance between band gap and second harmonic generation (SHG) response, which are usually inversely related, is the key factor for achieving good performance in a mid-infrared (mid-IR) nonlinear optical (NLO) crystal. To date it remains challenge to achieve this balance, which strongly hindered the development of mid-IR solid-state lasers. In this work, utillizing a functional units substitution strategy, we successfully realize the mid-IR NLO balanced performance in a chiral iodate Ga(IO3)3, which simultaneously exhibits a strong SHG response (13 × KDP) and a wide optical band gap (3.94 eV). The first-principles calculation is also performed to elucidated its NLO origin. Combining the experimental measurements and theoretical calculations, it is clear that Ga(IO3)3 possesses excellent comprehensive NLO performance including strong SHG effect, wide band gap, good thermal stability (450 °C), and large birefringence, indicating its potential applications as mid-IR NLO crystal. © 2023, The Authors. All rights reserved.

关键词： Harmonic generation

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Quality Improvement of BaGa4Se7 Crystal by Annealing in Base Vapor Atmosphere

SSRN

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SSRN 2024年

作者： Yao, Jiyong Sun, Mengran Shi, Jinlong Chen, Jindong Li, Chunxiao Beijing Center for Crystal Research and Development Key Lab of Functional Crystals and Laser Technology Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing100190 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China Tianjin Key Laboratory of Functional Crystal Materials Institute of Functional Crystal College of Materials Science and Engineering Tianjin University of Technology Tianjin300384 China

Infrared nonlinear optical crystals are widely used in all-solid-state lasers as pivotal devices for laser frequency conversion. BaGa4Se7 (BGSe) crystal has attracted much attention due to its excellent optical properties. However, the presence of point defects in BGSe increases the absorption loss and reduces the laser damage threshold, thus limiting its practical application in high-power mid- and far-infrared lasers. Therefore, it is crucial to reveal the types of defects and their formation mechanisms in BGSe crystal, which is conducive to the design of rational strategies to improve the crystal quality. In this work, the defect activation energies were calculated by photoluminescence (PL) spectroscopy and the existence of three types of defects, OSe, VSe and VBa were verified in the as grown BGSe crystal. Therefore, a thermal annealing process under BaSe vapor was rationally designed to compensate for the loss of Ba and Se elements and to reduce the defect concentration in BGSe. In addition, the changes of defects in BGSe crystal were determined by X-ray photoelectron spectroscopy (XPS) and photoluminescence (PL) spectra. All the experimental results confirm that the defect concentration in BGSe decreases greatly and the crystal quality is significantly improved after annealing in BaSe vapor. © 2024, The Authors. All rights reserved.

关键词： Selenium compounds

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Super‑elastic Scintillating Fibers and Fabrics for Efficient and Visual Radiation Detection

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Advanced Fiber Materials 2023年第4期5卷 1493-1504页

作者： Minghui Du Jin Wang Sijia Xu Hongwei Li Zhihao Zhang Yankun Qi Shichao Lv Jianrong Qiu Yurong Yan Shifeng Zhou State Key Laboratory of Luminescent Materials and Devices School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510641China Institute of Photonics Technology Jinan UniversityGuangzhou 510632China National Engineering Research Center of Novel Equipment for Polymer Processing School of Mechanical and Automotive EngineeringSouth China University of TechnologyGuangzhou 510641China Key Lab Guangdong High Property&Functional Polymer Materials School of Materials Science and EngineeringSouth China University of TechnologyGuangzhou 510641China Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and DevicesGuangzhou 510641China College of Optical Science and Engineering State Key Laboratory of Modern Optical InstrumentationZhejiang UniversityHangzhou 310027China

The fabrication of advanced radiation detectors is an important subject due to the wide use of radiation sources in scientific instruments,medical services,security check,non-destructive inspection,and nuclear ***,the manufacture of flexible and stretchable radiation detectors remains a ***,we report the scalable fabrication of super-elastic scintillating fibers and fabrics for visual radiation detection by thermal drawing and melt-spinning methods using styrene-b-(ethylene-co-butylene)-b-styrene,and scintillating Gd_(2)O_(2)S:Tb(GOS).Microstructure evolution,rheological properties,and radiation-composite interaction are studied to reveal the excellent processability,elasticity,and radiation detection ability of the fabricated *** from the physical crosslinking structural features of the polymer matrix and the excellent radiation absorption capacities of GOS,the resulting fiber can sustain high strains of 765%with a high content of GOS dopants(2 wt.%)and has excellent X-ray detection performance with the limit down to 53 nGy_(air)s^(-1).Furthermore,stretchable fabrics are constructed,and their applications in various fields,such as radiation warning,and X-ray imaging,are *** work not only provides a new type of super-elastic scintillating fibers and fabrics for smart textiles but also demonstrates their potential applications in the nuclear field.

关键词： Elastic fiber Radiation detection Optical materials X-ray imaging

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Bridgman Growth and Characterizations Of Nonlinear Optical Crystal La 3 Ga 5.5 Nb 0.5 O 14

SSRN

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SSRN 2024年

作者： Qian, Huiyu Jiang, Linwen Sun, Zhigang Wang, Lirong Liang, Tuanjie Zheng, Yanqing School of Materials Science and Chemical Engineering Ningbo University Ningbo315211 China Beijing Center for Crystal Research and Development Key Laboratory of Functional Crystals and Laser Technology Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing100190 China

La3Ga5.5Nb0.5O14 (LGN) crystal is a promising material for optical parametric chirped-pulse amplification (OPCPA) with high laser damage threshold and wide transmission range which is able to achieve high peak power laser. LGN with a diameter of 25 mm was successfully grown by the vertical Bridgman method for the first time and a series of characterizations were performed. The 1.7 µm absorption peak in transmittance spectra of LGN crystal which was caused by the Czochralski technique can be effectively eliminated by the vertical Bridgman method. LGN crystal possesses a high transmittance of 81.3% in the range of 0.294~7.500 μm. The experimental optical band gap of LGN is 4.16 eV which is positively correlated with laser damage threshold. The experimental laser damage threshold of LGN was determined to 1.416 GW/cm2 by Nb:YAG. The outstanding thermal properties of LGN indicate that it possesses thermal stability in high energy laser field. This work demonstrates that LGN crystal holds great potential for OPCPA applications and the vertical Bridgman method is proved to be a effective and excellent technique to grow large size LGN crystal. © 2024, The Authors. All rights reserved.

关键词： Thermodynamic properties

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Widely tunable continuous-wave visible and mid-infrared light generation based on a dual-wavelength switchable and tunable random Raman fiber laser

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Photonics Research 2023年第5期11卷 808-816页

作者： HAN WU WEIZHE WANG BO HU YANG LI KAN TIAN RUI MA CHUNXIAO LI JUN LIU JIYONG YAO HOUKUN LIANG College of Electronics and Information Engineering Sichuan UniversityChengdu 610064China International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of Education Institute of Microscale OptoelectronicsShenzhen UniversityShenzhen 518060China Beijing Center for Crystal Research and Development Key Laboratory of Functional Crystals and Laser TechnologyTechnical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Nonlinear frequency conversion of wavelength agile and high-power random fiber lasers can provide a promising way to generate continuous-wave(CW)visible and mid-infrared(MIR)light with unique properties such as the continuous modeless spectrum,low temporal/spatial coherence,and high temporal ***,we report a dual-wavelength switchable and tunable random Raman fiber laser(RRFL)based on a phosphosilicate fiber that has two Raman gain peaks for the first time and demonstrate its superior capability to generate widely tunable CW visible and mid-infrared light via nonlinear frequency *** using the combination of a tunable pump and two tunable gratings in Littrow configuration that can provide separated point feedback for the two Stokes wavelengths corresponding to silica-and phosphorus-related Raman peaks,the spectrum of an RRFL can be flexibly manipulated for the aim of nonlinear frequency conversions,including single-wavelength tunable emission at the 1.1μm or 1.2μm band for second-harmonic generation(SHG),dual-wavelength simultaneously tunable emission at the 1.1μm and 1.2μm bands for the sum-frequency generation(SFG),and dual-wavelength separation tunable emission for difference-frequency generation(DFG).As a result,with the combination of SHG and SFG in a periodically poled lithium niobate crystal array,we experimentally demonstrate the broadest tuning range(560-630 nm)of visible light generated from an RRFL,to the best of our *** tunable MIR light in the range of 10.7-12.3μm is also demonstrated through DFG of an RRFL operating in separation tunable dual-wavelength emission mode in a Ba Ga4Se7(BGSe)crystal,which is the first realization of>10μm CW DFG in the BGSe *** believe the developed dual-wavelength switchable and tunable RRFL can provide a new compact,robust,and cost-effective platform to realize broadly tunable light in both the visible and MIR regions,which can also find potential applications in imaging,sensing,and tem

关键词： tunable fiber tuning

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High power continuous-wave and quasi-continuous-wave operation of diode-pumped Tm:YAG all-solid-state laser oscillator at 2.02 μm

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Optik 2025年 326卷

作者： Wu, Jian-Hong Bian, Qi Bo, Yong Cui, Da-Fu Peng, Qin-Jun Key Lab of Solid State Laser Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing100190 China Key Lab of Functional Crystal and Laser Technology Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing100190 China Institute of Optical Physics and Engineering Technology Qilu Zhongke Jinan250000 China University of Chinese Academy of Sciences Beijing100190 China

We present a high-power all-solid-state Tm:YAG laser operating at 2.02 μm in both continuous-wave (CW) and quasi-continuous-wave (QCW) regimes. Through rigorous testing of CW laser diodes (LDs) for QCW pulsed operation, the system achieves an average output power of up to 33.97 W at 100 Hz with a pulse width of 670 μs and a beam quality of M2= 8.66. In the CW regime, it delivers a record-high output power of 317.3 W. The beam quality is degraded to be M2= 22.75 due to the severe thermal effects in the crystal. This is the first demonstration of CW and QCW dual-regime operation in a single diode-pumped Tm:YAG laser oscillator. This versatile laser system offers a reliable solution for applications requiring high-power mid-infrared sources. © 2025 Elsevier GmbH

关键词： Continuous wave lasers

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