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2015全国压电和声波理论及器件技术研讨会

作者： xutang tao Xian Zhao Chunlei Wang Fapeng Yu

＜正＞The Symposium on Piezoelectricity,Acoustic Waves,and Device Applications（SPAWDA）is an interdisciplinary and product-focused technical forum with international flavor,which has been rapidly growing in the last ten *** the strong supports from the Chinese Society of Theoretical and Applied Mechanics（CSTAM）,the Acoustical Society of China（ASC）,and the IEEE UFFC Society（UFFC-S）,the SPAWDA 2015,which is the

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“微距升华”晶体生长方法

人工晶体学报 2021年第1期50卷 1-6页

作者：叶欣刘阳陶绪堂山东大学晶体材料国家重点实验室晶体材料研究所

随着功能器件向微型化发展,微纳米尺度的低维晶体成为构建新一代功能器件的材料基础。传统的体块单晶生长方法不适用于低维晶体。长久以来,对新型低维材料的研究依赖于机械剥离、溶液法和化学/物理气相沉积等方法,这些方法在效率、可控... 详细信息

随着功能器件向微型化发展,微纳米尺度的低维晶体成为构建新一代功能器件的材料基础。传统的体块单晶生长方法不适用于低维晶体。长久以来,对新型低维材料的研究依赖于机械剥离、溶液法和化学/物理气相沉积等方法,这些方法在效率、可控性和适用性等方面存在诸多限制,因此发展高效可控的低维晶体新型生长方法成为实现这些低维材料器件实用化的前提。山东大学晶体材料国家重点实验室陶绪堂、刘阳团队基于多年来在分子材料结晶基础方面的研究成果,发明了新的"微距升华"低维晶体生长方法。"微距升华"法利用原料与生长衬底之间的微小间距,可以在常压下实现常规物理气相传输中需要高真空才能够达到的分子流传输模式,使生长过程不再受传质限制,因此微距升华法无须真空和载气,速度快,原料利用率接近100%。该方法适用于大部分的有机半导体、金属配合物,甚至含有大量羧基、羟基的药物分子及熔点在一定范围内的无机物晶体,生长的微纳米晶体与电子器件制程匹配,屡次创新器件迁移率记录。新方法受到业界广泛关注,已被多国科学家采用。

关键词：微距升华法晶体生长方法有机晶体无机晶体微纳米晶体

High-Energy Tunable 6.5-12 μm Picosecond Mid-Infrared Radiation Generated from Optical Parametric Amplifier Based on LiInSe_(2) Crystal

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激光与光电子学进展 2024年第13期61卷 457-462页

作者： Zhang Jingjing Wang Shilei Yang Feng Wang Shanpeng Gao Hongwei Bo Yong Cui Dafu tao xutang Peng Qinjun Key Lab of Solid State Laser Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100ShandongChina

We report high-energy tunable 6.5-12 μm ps mid-infrared radiation generation based on OPA pumped using 1064 nm laser in LISe *** simulated the relationship between the idler energy and crystal *** optimum LISe length of 4 mm was used to enhance the idler energy *** a pump energy of ~9.4 mJ, energy levels of ~146 and of ~27 μJ are generated at 6.5 μm and 12 μm, *** highest energy of ~205 μJ is achieved at 8.1 μm at a pump energy of ~19 ***, the angular and spectral width acceptance are measured.

关键词： tunable mid-infrared radiation nonlinear optical crystal LiInSe2 crystal optical parametric amplifier

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New developments in nonlinear optical crystals of molybdate and tungstate

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New developments in nonlinear optical crystals of molybdate ...

High quality crystal growth and characterization of ferroelectric Ba_(0.77)Ca_(0.23)TiO_(3) single crystal

中国化学会第九届全国无机化学学术会议

作者： xutang tao Zeliang Gao Youxuan Sun Xiangxin Tian Qian Wu State Key Laboratory of Crystal Materials Shandong University

A series of new nonlinear crystals based on molybdates that containing Tellurium atoms have been grown by flux method and their linear and nonlinear optical properties have been studied. Polycrystalline Ba Te Mo2O9（BTM） samples were synthesized using the traditional solid state reaction techniques. The results indicate temperatures below 570 °C favored production of β-BTM, while higher temperatures led to production of α-BTM. The phase relationship between the two phases has been studied. Since both β-BTM and α-BTM melt incongruently, appropriate fluxes should be introduced to decrease the crystal growth temperature. After a great amount of attempts, the Te O2-Mo O3 flux system was adopted to grow large crystals. The obtained crystals are shown in Fig. 1. The second order nonlinear optical properties of β-BTM were studied by means of the Marker fringe technology and the phase matching method. The values and relative signs of the second order nonlinear optical coefficients were obtained, with the largest one being d31 = 9.88 pm/V. At 1064 nm, the crystal can realize both type I and type II phase matching, and the effective nonlinear coefficient is 10.3 pm/V for phase matching II in the xoy plane.

关键词： Molybdate Tungstate phase transfer nonlinear optical

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Journal of Advanced Dielectrics 2023年第2期13卷 32-37页

作者： Lei Liu Fangyi Yin Guiyuan Zhao Limei Zheng Xiuwei Fu Zhitai Jia xutang tao State Key Laboratory of Crystal Materials Shandong University JinanShandong 250100P.R.China School of Physics Shandong UniversityJinanShandong 250100P.R.China Shandong Research Institute of Industrial Technology Jinan Shandong 250100P.R.China

Ba_(0.77)Ca_(0.23)TiO_(3)(BCT)single crystal has been widely studied as a promising lead-free ferroelectric *** this work,high-quality BCT crystal was successfully grown by the Czochralski(CZ)*** as-grown crystal is crack-free and shows black *** possesses a high dielectric stability over a wide temperature range,while the dielectric loss is rather small below 90℃.Furthermore,it possesses excellent ferroelectric properties with residual polarization strength(Pr)and coercive field(Ec)of 17.93μC/cm^(2) and 8.47 kV/cm,***,BCT crystal shows large electromechanical coupling factors,with kt,k31,k33 and k15 of 0.535,0.254,0.714 and 0.721,*** piezoelectric coefficients d31,d33 and d15 are measured to be−36.5,130 and 246 pC/N,respectively.

关键词： Lead-free piezoelectric material oxides crystal growth Czochralski method

Lead-free halide perovskite Cs_(3)Bi_(2)Br_(9)single crystals for high-performance X-ray detection

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Science China Materials 2021年第6期64卷 1427-1436页

作者： Xiang Li Xinyuan Du Peng Zhang Yunqiu Hua Lin Liu Guangda Niu Guodong Zhang Jiang Tang xutang tao State Key Laboratory of Crystal Materials Institute of Crystal MaterialsShandong UniversityJinan 250100China Wuhan National Laboratory for Optoelectronics(WNLO) Huazhong University of Science and Technology(HUST)Wuhan 430074China

All-inorganic lead-free halide perovskites have attracted interest owing to their high ambient and thermal stabilities,excellent optoelectronic properties,and environmental ***,the bismuth-based halide perovskite Cs_(3)Bi_(2)Br_(9)single crystals were successfully grown to a diameter of 12 mm and length of 40 mm using a modified Bridgman method for the first *** resistivity and transmittance of transparent and crack-free Cs_(3)Bi_(2)Br_(9)single crystal are~6.8×10^(11)Ωcm and~80%,*** carrier mobility of the(−120)plane is 0.17 cm^(2)V^(−1)s^(−1)along the[010]orientation(b axis),and the trap density is 9.7×10^(10)cm^(−3).Moreover,Cs_(3)Bi_(2)Br_(9)single crystals exhibit excellent potential for X-ray detection,including a high absorption coefficient,a superior X-ray sensitivity of~230.4μC Gyair^(−1)cm^(−2),and an ultra-low and no-drift dark current density of~17.8 pA mm−2,which enables lower noise and is also beneficial to the ultralow detection limit for X-ray *** study shows that Cs_(3)Bi_(2)Br_(9)is a promising candidate for X-ray detection applications.

关键词： all-inorganic halide perovskite Cs_(3)Bi_(2)Br_(9) single crystal growth X-ray detection

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宽禁带半导体氧化镓晶体和器件研究进展

中国材料进展 2020年第2期39卷 113-123页

作者：陶绪堂穆文祥贾志泰山东大学晶体材料国家重点实验室

β-Ga2O3作为新型宽禁带半导体材料,近年来受到了人们的广泛关注。β-Ga2O3禁带宽度可达4. 7 e V,相比于第三代半导体SiC和Ga N,具有禁带宽度更大、击穿场强更高、Baliga品质因子更大、吸收截止边更短、生长成本更低的优点,有望成为高... 详细信息

β-Ga2O3作为新型宽禁带半导体材料,近年来受到了人们的广泛关注。β-Ga2O3禁带宽度可达4. 7 e V,相比于第三代半导体SiC和Ga N,具有禁带宽度更大、击穿场强更高、Baliga品质因子更大、吸收截止边更短、生长成本更低的优点,有望成为高压、大功率、低损耗功率器件和深紫外光电子器件的优选材料。此外,β-Ga2O3单晶可以通过熔体法生长,材料制备成本相对较低,有利于大规模应用。重点介绍了β-Ga2O3单晶的生长及工艺优化,然后对晶体加工、性能表征、光电探测及功率器件应用等方面进行了讨论,并展望了β-Ga2O3晶体未来的发展方向。

关键词： β-Ga2O3 宽禁带半导体单晶生长晶体加工紫外探测器肖特基二极管

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激光加热基座技术生长超细单晶光纤研究

人工晶体学报 2022年第3期51卷 428-433页

作者：王涛贾志泰李阳张健陶绪堂山东大学晶体材料国家重点实验室晶体材料研究院济南250100

单晶光纤(SCF)是具有纤维结构的“准一维”功能晶体材料,在高能激光、高温传感、辐射探测、信息通信等国防民生领域展现出了巨大的应用前景。本文采用激光加热基座技术成功制备出直径60~100μm、长径比>6000∶1的超细Al_(2)O_(3)、YAG... 详细信息

单晶光纤(SCF)是具有纤维结构的“准一维”功能晶体材料,在高能激光、高温传感、辐射探测、信息通信等国防民生领域展现出了巨大的应用前景。本文采用激光加热基座技术成功制备出直径60~100μm、长径比>6000∶1的超细Al_(2)O_(3)、YAG单晶光纤,单晶光纤平均直径起伏<4%,展现出良好的柔韧性与波导特性,为单晶光纤器件的小型化与集成化创造了条件。

关键词：超细单晶光纤 Al_(2)O_(3)单晶光纤 YAG单晶光纤激光加热基座法功能晶体单晶生长直径起伏

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单晶光纤制备及高温传感器研究进展

人工晶体学报 2021年第9期50卷 1603-1624页

作者：王涛贾志泰李阳张健陶绪堂山东大学晶体材料国家重点实验室晶体材料研究所

单晶光纤(single-crystal fiber),是一种纤维形态的晶体材料,凭借优异的物理和化学性能以及大长径比的结构特点在国防及民生领域都有着广泛的应用前景。随着导模法、激光加热基座法以及微下拉法等生长技术的日渐成熟,单晶光纤迎来了科... 详细信息

单晶光纤(single-crystal fiber),是一种纤维形态的晶体材料,凭借优异的物理和化学性能以及大长径比的结构特点在国防及民生领域都有着广泛的应用前景。随着导模法、激光加热基座法以及微下拉法等生长技术的日渐成熟,单晶光纤迎来了科学研究和应用发展的黄金时期,其材料种类以及应用方向均呈现多元化发展态势,其中面向高温传感领域的高熔点氧化物单晶光纤凭借其耐高温、抗氧化、结构紧凑等特点在强氧化、强辐射、强腐蚀、强电磁干扰等极端环境中展现出了巨大的应用潜力。近年来,研究者们不断将光学、声学等传感技术与单晶光纤介质相结合,在保持传感器结构灵活性的基础上,拓宽了常规玻璃光纤传感器的使用温度,同时弥补了热电偶等传统接触式测温技术在恶劣环境中寿命较低的缺陷。本文以单晶光纤的制备技术为出发点,回顾了单晶光纤的发展历史,分析了单晶光纤三种主要制备方法的技术特点及发展现状。同时,总结了单晶光纤在高温传感领域的主要研究成果,展望了单晶光纤高温传感技术的应用前景。

关键词：单晶光纤单晶生长高温传感器光纤传感器导模法微下拉法激光加热基座法