孔勇发

学科：

      凝聚态物理、光学

从事工作：

      光电功能材料的制备、性能及器件的研究工作。

      在弱光非线性光学材料，尤其是光功能晶体的生长、缺陷结构调控、抗光损伤及光折变性能、全息存储、光子学微结构及器件等方面有比较系统的研究。

方向简介：

（1）随着信息时代的迅猛发展，半导体器件已经逐渐逼近其物理极限，人们在寻找信息传输、处理、存储更加高效的新材料。近二十年，光子学及光子技术所取得的巨大成就使人们相信，光电子时代，或者说光子时代，离我们越来越近。但是目前，光子学材料与半导体材料的类比不能更加深入地进行下去，因为与电子相比，对光子的控制要困难得多。利用晶体的非线性效应实现光控光是控制光子的有效手段，正因为如此，非线性光学与光子学材料成为推动光子技术的关键材料之一。从单晶硅的发展历程可知，缺陷研究与调控对于器件性能的改善起到了关键作用。没有掺杂工程，就不可能有当今微电子、大规模集成电路等的蓬勃发展。光子学材料的发展也需要走相似的道路，没有对过渡金属及氢离子的调控，就没有现在的光纤通讯。充分了解缺陷对材料非线性光学效应的影响，掌握缺陷与光子学性质之间的构效关系，在此基础上，针对不同的应用，制备特定功能的光子学材料，是光子学材料设计与制备的必由之路。

（2）激光显示被认为是继黑白显示、彩色显示、数字显示之后的新一代显示技术，被称为“人类视觉史上的革命”，具有色域范围广、寿命长、节环保等特点。在红、绿、蓝三基色激光中，目前红光和蓝光已经解决，但绿光技术还不成熟，而通过周期极化掺镁铌酸锂晶体倍频获得绿光是一种可行的方案。裸眼立体显示一直被公认为显示技术发展的终极梦想，多年来有许多企业和研究机构从事这方面的研究。现已开发出佩戴立体眼镜的立体显示技术，不需佩戴立体眼镜的立体显示技术体系也在研发中。通过全息技术再现立体图像是一种不需要显示器的立体显示技术，能够真正给人身临其境的感觉。铌酸锂晶体作为常用的全息存储材料是可选择的材料之一。

（3）能源在国民经济中具有特别重要的战略地位，持续快速增长的能源需求和能源的清洁高效利用，对能源科技发展提出重大挑战。太阳能发电拥有无污染、不枯竭、分布广、使用安全等特点。提高效率、降低成本一直是太阳能电池领域研发的主题。当前的太阳能前沿技术早已脱离了单一的pn结，多种技术的综合运用是提高太阳能电池转换效率的发展趋势。非中心对称的宽禁带氧化物材料具有反常光生伏打效应，如掺铁铌酸锂晶体，其光生伏打场高达100 kV/cm，该光生伏打效应不但可以大幅提高光伏电池的输出电压，还可以与pn结的光伏效应有机结合起来，制作出具有复合光伏效应的太阳能电池。

1.本科生《功能材料》；

2.本科生《普通物理实验》；

3.本科生《神奇的物理世界》；

4.研究生《凝聚态物理前沿讲座》。

作为负责人主持的科研项目：

[1]双掺铌酸锂晶体非挥发性全息存储的研究，中国博士后科学基金。

[2]光电器件用铌酸锂晶体，天津重大科技攻关。

[3]大尺寸、高均匀性近化学计量比铌酸锂晶体的生长及产业化技术，863新材料技术。

[4]近完美铌酸锂晶体及其电光性能的优化研究，国家自然科学青年基金。

[5]铌酸锂晶体光子学基质平台的研究，教育部跨世纪优秀人才培养计划基金。

[6]熔体注入法生长近化学比铌酸锂的工艺研究，横向课题。

[7]光感应二维非线性光子晶体及其基本性能的研究，国家自然科学基金。

[8]氧化物介观薄膜原子尺度可控制备与超快紫外器件研究，“973”计划子课题。

[9]四价掺杂铌酸锂晶体，“863”新材料技术。

[10]弱光非线性光子学材料的缺陷设计与构筑，国家自然科学基金。

[11]非中心对称宽禁带氧化物高压光伏效应的合作研究，国家国际科技合作专项。

[12]介观结构新型氧化物紫外／深紫外光电探测及器件研究，“973”计划子课题。

[13]抗光损伤铌酸锂晶体与体光生伏打效应的研究，国家自然科学基金。

2016-

1. [110] Dahuai Zheng, Yongfa Kong, Shiguo Liu, Muling Chen, Shaolin Chen, Ling Zhang, Romano Ruppand Jingjun Xu, The simultaneous enhancement of photorefraction and optical damage resistance in MgO and Bi₂O₃ co-doped LiNbO₃ crystals, Sci. Rep.6, 20308; doi: 10.1038/srep20308 (2016).

2. [111] WeiHu,PaiShan,TongqingSun,HongdeLiu,JianmingZhang,XuanwenLiu,YongfaKong,JingjunXu,Preparation, nonlinear optical properties, and theoretical analysis of the non-centrosymmetric bismuth oxyfluoride, Bi₇F₁₁O₅, J. Alloy. Compd. 658 788-794 (2016).

3. [112] Shaojun Sun, Li Wu, Huan Yi, Liwei Wu,Jingyuan Ji, Chunling Zhang, Yi Zhang, Yongfa Kong, Jingjun Xu, Energy transfer between Ce³⁺ and Tb³⁺ and the enhanced luminescence of a green phosphor SrB₂O₄:Ce³⁺, Tb³⁺, Na⁺, Opt. Mater. Express, 6(4), 1172-1185 (2016).

4. [113] Pai Shan, Tongqing Sun, Hong Chen,Hongde Liu, Shaolin Chen, Xuanwen Liu, Yongfa Kong, Jingjun Xu, Crystal growth and optical characteristics of beryllium-free polyphosphate, KLa(PO₃)₄, a possible deep-ultraviolet nonlinear optical crystal.Sci. Rep.6, 25201; doi: 10.1038/srep25201 (2016).

5. [114] Tian Tian, Yongfa Kong, Hongde Liu, Shiguo Liu, Wei Li, Shaolin Chen, Jingjun Xu, Jiayue Xu, Haibo Zeng, Fabrication and formation mechanism of p-type lithium niobate crystals by molybdenum doping and polarization, J Mater Sci: Mater Electron 27, 5886-5891 (2016).

6. [115] Huan Yi, Li Wu, Liwei Wu, Lixia Zhao, Zhiguo Xia, Yi Zhang, Yongfa Kong, and Jingjun Xu, Crystal Structure of High-Temperature Phase β-NaSrBO₃and Photoluminescence of β-NaSrBO₃:Ce³⁺, Inorg. Chem. 55(13), 6487–6495 (2016).

7. [116] Pai Shan, Tongqing Sun, Hongde Liu, Shiguo Liu, Shaolin Chen, Xuanwen Liu, Yongfa Kong, and Jingjun Xu, Growth, Properties, and Theoretical Analysis of KBa₂(PO₃)₅ Single Crystal, Crystal Growth & Design 16(10), 5588-5592 (2016).

8. [117] Liwei Wu, Yuxing Bai, Li Wu, Huan Yi, Yongfa Kong, Yi Zhang and Jingjun Xu, Sm³⁺and Eu³⁺codoped SrBi₂B₂O₇: a red-emitting phosphor with improved thermal stability, RSC Adv. 7, 1146–1153 (2017).

9. [118] Tian Tian, Xiaodong Yan, Yongfa Kong, Hongde Liu, Dahuai Zheng, Shiguo Liu, Shaolin Chen, Jingjun Xu, Jiayue Xu, Remarkable improvement in the photorefractive response speed and the mechanism of pure congruent lithium niobate crystals by polarization, Crystals7(12), 368 (2017); doi: 10.3390/cryst7120368.

10. [119] Tengfei Kong, Hongde Liu, Xinyu Ge, Da Qu, Shiguo Liu, Shaolin Chen, Ling Zhang, Yongfa Kong, Romano Rupp, and Jingjun Xu, Room temperature 90° phase-matching in zirconium and magnesium co-doped lithium niobate crystals, Scientific Reports, (2018) 8:3865.

11. [120] Ling Zhu, Dahuai Zheng, Shahzad Saeed, Shuolin Wang, Hongde Liu, Yongfa Kong, Shiguo Liu, Shaolin Chen, Ling Zhang, and Jingjun Xu, Photorefractive properties of molybdenum and hafnium co-doped LiNbO₃ crystals, Crystals8(8), 322 (2018).

12. [121] Ling Zhu, Dahuai Zheng, Hongde Liu, Shahzad Saeed, Shuolin Wang, Shiguo Liu, Shaolin Chen, Yongfa Kong,and Jingjun Xu, Enhanced photorefractive properties of indium co-doped LiNbO₃:Mo crystals, AIP Advances 8(9), 095316 (2018).

13. [122] Liwei Wu, Yuxing Bai, Li Wu, Huan Yi, Xinzheng Zhang, Lixin Zhang,Yongfa Kong, Yi Zhang and Jingjun Xu, Analysis of the structure and abnormalphotoluminescence of a red-emittingLiMgBO₃:Mn²⁺ phosphor, Dalton Trans.47,13094–13105 (2018).

14. [123] Weiwei Wang, Dahuai Zheng, Mengyuan Hu, Shahzad Saeed, Hongde Liu, Yongfa Kong, Lixin Zhang and Jingjun Xu, Effect of Defects on Spontaneous Polarization in Pure and Doped LiNbO₃: First-Principles Calculations, Materials 12, 100 (2019); doi:10.3390/ma12010100.

15. [124] Wencan Li, Jiao Cui, Weiwei Wang, Dahuai Zheng, Longfei Jia, Shahzad Saeed, Hongde Liu, Romano Rupp, Yongfa Kong, and Jingjun Xu, P-Type Lithium Niobate Thin Films Fabricated by Nitrogen-Doping, Materials 12, 819 (2019); doi:10.3390/ma12050819.

16. [125] Liyun Xue, Hongde Liu, Dahuai Zheng, Shahzad Saeed, Xuying Wang, Tian Tian, Ling Zhu, Yongfa Kong, Shiguo Liu, Shaolin Chen, Ling Zhang, and Jingjun Xu, The Photorefractive Response of Zn and Mo Codoped LiNbO₃ in the Visible Region, Crystals 9, 228 (2019); doi:10.3390/cryst9050228.

17. [126] Huimin Chen,Liwei Wu,Fang Bo,Jikang Jian,Li Wu, Hongwu Zhang, Lirong Zheng, Yongfa Kong,Yi Zhang, and Jingjun Xu, Coexistence of self-reduction from Mn⁴⁺ to Mn²⁺ and elastico-mechanoluminescence in diphase KZn(PO₃)₃:Mn²⁺,J. Mater. Chem. C 7, 7096-7103 (2019).

18. [127] Yang Zhong, Pai Shan, Tongqing Sun, Zhenpeng Hu, Hongde Liu, Shiguo Liu, Yongfa Kong and Jingjun Xu, Growth and theoretical study on the deep-ultraviolet transparent β-CsBa₂(PO₃)₅nonlinear optical crystal, CrystEngComm21, 4690-4695 (2019).

19. [128] Dahuai Zheng, Weiwei Wang, Shuolin Wang, Da Qu, Hongde Liu, Yongfa Kong, Shiguo Liu, Shaolin Chen, Romano Rupp, and Jingjun Xu, Real-time dynamic holographic display realized by bismuth and magnesium codoped lithium niobate, Appl. Phys. Lett. 114, 241903 (2019). (Editor's picks)

20. [129] Shahzad Saeed, Dahuai Zheng, Hongde Liu, Liyun Xue, Weiwei Wang, Ling Zhu, Mengyuan Hu, Shiguo Liu, Shaolin Chen, Ling Zhang, Yongfa Kong, Romano Rupp, and Jingjun Xu, Rapid response of photorefraction in vanadium and magnesium co-doped lithium niobate, J. Phys. D: Appl. Phys. 52, 405303 (2019).

21. [130] Wencan Li, Jiao Cui, Dahuai Zheng, WeiweiWang, Shuolin Wang, Shaoqing Song, Hongde Liu, Yongfa Kong, and Jingjun Xu, Fabrication and Characteristics of Heavily Fe-Doped LiNbO₃/Si Heterojunction, Materials 12, 2659 (2019); doi:10.3390/ma12172659.

22. [131] Yongfa Kong, Fang Bo, Weiwei Wang, Dahuai Zheng, Hongde Liu, Guoquan Zhang, Romano Rupp, and Jingjun Xu, Recent Progress in Lithium Niobate: Optical Damage, Defect Simulation, and On-Chip Devices, Adv. Mater. 2019, 1806452; DOI: 10.1002/adma.201806452. (Progress Report)

1994-2005

[1]Yongfa Kong, Jinke Win, andHuafu Wang, Dislocations and subgrain boundaries in highly magnesium-dopedlithium niobate crystals, J. Crystal Growth, 140 (1994) 45-50.

[2]Yongfa Kong, Jiachun Deng,Wanlin Zhang, Jinke Wen, Guangyin Zhang, and Huafu Wang, OH-absorption spectra in doped lithium niobate crystals, Phys. Lett. A, 196 (1994)128-32.

[3]Yongfa Kong, Jinke Wen, andHuafu Wang, New doped lithium niobate crystal with high resistance tophotorefraction—LiNbO₃:In,Appl. Phys. Lett., 66[3] (1995) 280-1.

[4]Jiachun Deng, Yongfa Kong,Jiang Li, Jinke Wen, and Bing Li, Reduction of laser-induced dark traces in LiNbO₃:Mg and LiNbO₃:Zn by heat treatment, J. Appl. Phys., 79[12] (1996) 9334-7.

[5]Kong Yong-fa, Wen Jin-ke, andYang Zheng-fang, Photorefraction resistance of Na₂O-doped lithiumniobate single crystals, Chin. Phys. Lett., 14[8] (1997) 629-32.

[6]YongfaKong*, Zhengfang Yang, Guangyin Zhang, and Qinming Yuan, Friction and wearcharacteristics of mullite, ZTM and TZP ceramics, Wear 218 (1998) 159-166.

[7]YongfaKong, Jingjun Xu, Wanlin Zhang, and Guangyin Zhang, The proton site occupationin congruent lithium niobate crystal determined by nuclear magnetic resonance, Phys.Lett. A. 250 (1998) 211-213.

[8]YongfaKong, Jingjun Xu, Xiaojun Chen, Wanlin Zhang, and Guangyin Zhang, OH-absorption spectra of pure lithium niobate crystals, J. Phys.: Condens. Matter11 (1999) 2139-2143.

[9]Jingjun Xu, Guangyin Zhang,Feifei Li, Xinzheng Zhang, Qian Sun, Simin Liu, Feng Song, Yongfa Kong, XiaojunChen, Haijun Qiao, Jianghong Yao, Lijuan Zhao, Enhancement of UVphotorefraction in highly doped-Mg LiNbO₃, Opt. Lett. 25(2) (2000)129-31.

[10]Y.Kong*, J. Xu, W. Zhang, and G. Zhang, The site occupation protons in lithiumniobate crystals, J. Phys. Chem. Solids, 61(8) (2000) 1331-5.

[11]Yongfa Kong*, Jingjun Xu,Xiaojun Chen, Cunzhou Zhang, Wanlin Zhang, Guangyin Zhang, Ilmenite-likestacking defect in non-stoichiometric lithium niobate crystals investigated byRaman scattering spectra, J. Appl. Phys. 87(9) (2000) 4410-4.

[12]Yun-LinChen, Jing-Jun Xu, Xiao-Jun Chen, Yongfa Kong, Guang-Yin Zhang, Domain reversalprocess of near-stoichiometric LiNbO₃ crystals, Opt. Commun. 188(2001) 359-64.

[13]Zhenxiang Cheng, Qingming Lu,Shujun Zhang, Junhai Liu, Xiujie Yi, Feng Song, Yongfa Kong, Jianru Han, andHuanchu Chen, Growth and properties of NaEr(WO₄)₂crystals, J. Crystal Growth 222 (2001) 797-800.

[14]LI Fei-Fei, XU Jing-Jun, KONG Yong-Fa, HUANG Hui, ZHANG Guang-Yin,YANG Chun-Hui, and XU Yu-Heng, Light-induced absorption in nominally pureBismuth Silicon Oxide, Chin. Phys. Lett., 18(12) (2001) 1595-1597.

[15]Yun-Lin Chen, Jing-Jun Xu, Yong-Fa Kong, and GuangyinZhang, Ferroelectric domain inversion in near stoichiometric lithium niobatefor high efficiency blue light generation, Appl. Physics A, 74(2) (2002) 187-190.

[16]Yongfa Kong*, Zhengfang Yang,Guangyin Zhang, Qiming Yuan, Sliding friction and wear of alumina-reinforcedzirconia-toughened mullite composites, Wear, 252 (2002)607-613.

[17]Yun-Lin Chen, Jing-Jun Xu, Yong-Fa Kong, Shaolin Chen, andGuangyin Zhang, Effect of Li diffusion on the domain inversion ofLiNbO₃ prepared by vapor transport equilibration, Appl. Phys. Lett.,81(4) (2002) 700~702.

[18]Y.L. Chen, J.P. Wen, Y.F. Kong, S.L. Chen,W.L. Zhang, J.J. Xu, G.Y. Zhang, Effect of Li diffusion in the composition ofLiNbO₃ at high temperature, J. Crystal Growth, 242 (2002) 400~404.

[19]Yunlin Chen, Wanlin Zhang, Yongchun Shu, Cibo Lou, Yongfa Kong, ZihengHuang, Jingjun Xu, Guangyin Zhang, Determination of the Li/Nb ratio in LiNbO₃crystals prepared by vapor transport equilibration method, Optical Materials, 23, 295–298 (2003).

[20]Chen YH, Yao JH, Yan BX, DengHL, Kong YF, Chen SL, Xu JJ, Zhang GY, Harmonic violet light generation inperiodically poled bulk near-stoichiometric MgO-doped LiNbO₃, Opt. Commun., 224(1-3), 149-153 (2003).

[21]Yunlin Chen, Cibo Lou, JingjunXu, Shaolin Chen, Yongfa Kong, Guangyin Zhang, and Jianping Wen, DomainSwitching characteristics of near stoichiometric LiNbO₃ doped withMgO, J. Appl. Phys. 94 (2003) 3350-3352.

[22]Yongfa Kong*, Jingjun Xu,Wanlin Zhang, Yunlin Chen, Bing Li, Shaolin Chen, Ziheng Huang, Ling Zhang,Shiguo Liu, Wenbo Yan, Hongde Liu, Xiang Xie, Lihong Shi, Xiaochun Li, andGuangyin Zhang, The OH^-related defect structures in low-doped lithium niobate crystals, Infr. Phys. Tech. 45 (2004) 281-289.

[23]Wenbo Yan, Yongfa Kong*, LihongShi, Xiang Xie, Xiaochun Li, Jingjun Xu, Cibo Lou, Hongde Liu, Wanlin Zhang,and Guangyin Zhang, The H⁺ related defects in near-stoichiometriclithium niobate crystals investigated by domain reversal, Phys. Stat. Sol. (a)201(9) (2004) 2013-20.

[24]J.H. Yao, Y.H. Chen, B.X.Yan, H.L. Deng, Y.F. Kong, S.L. Chen, J.J. Xu, G.Y. Zhang, Characteristics of domaininversion in magnesium-oxidedoped lithium niobate, PhysicaB 352 (2004) 294-298.

[25]Yongfa Kong*, Jingjun Xu, Bing Li, Shaolin Chen, Ziheng Huang, LingZhang, Shiguo Liu, Wenbo Yan, Hongde Liu, Xiang Xie, Lihong Shi, Xiaochun Li, GuangyinZhang, The asymmetry between the domain walls of periodically poled lithiumniobate crystals, Opt. Mat. 27 (2004) 471-473.

[26]TANG Li-Qin, ZHAO Li-Juan,ZHANG Xin-Zheng, YU Hua, MENG Jie, LIANG Qin, XU Jing-Jun, KONG Yong-Fa,Luminescent Enhancemnt in Mg- and Er- codped LiNbO₃ crystals, Chin.Phys. Lett. 22(3) (2005) 588-590.

[27]W. Yan, Y. Kong*, L. Shi, J. Yao, S. Chen, L. Sun, D. Zhao, and J. Xu, The H+ related defectsinvolved in domain reversal for both near-stoichiometric and heavily Mg-dopedlithium niobate crystals, Eur. Phys. J. B 43, 347-353 (2005).

[28]Lihong Shi, Yongfa Kong*, Wenbo Yan, Hongde Liu,Xiaochun Li, Xiang Xie, Di Zhao, Lei Sun, Jingjun Xu, Jun Sun, Shaolin Chen,Ling Zhang, Ziheng Huang, Shiguo Liu, Wanlin Zhang, Guangyin Zhang, The compositiondependence and new assignment of the Raman spectrum in lithium tantalate, Solid State Commun.135 (2005) 251–256.

[29]WANG Zhen-Hua, ZHANG Xin-Zheng, XU Jing-Jun, WU Qiang, QIAOHai-Jun, TANG Bai-Quan, RUPP Romano, KONG Yong-Fa, CHEN Shao-Lin, HUANGZi-Heng, LI Bing, LIU Shi-Guo, ZHANG Ling, Time-Resolved Femtosecond DegenerateFour-Wave Mixing in LiNbO3:Fe,Mg Crystal, Chin. Phys. Lett., 22(11) (2005) 2831.

2006-2010

[30]Wenbo Yan, Yongfa Kong*, Lihong Shi, Lei Sun, Hongde Liu, XiaochunLi, Di Zhao, Jingjun Xu, Shaolin Chen, Ling Zhang, Ziheng Huang, Shiguo Liuand GuangyinZhang, The relationshipbetween the switching field and the intrinsic defects in near-stoichiometriclithium niobate crystals, J. Phys. D: Appl. Phys. 39 (2006) 21-24.

[31]Hongde Liu, Xiang Xie, YongfaKong*, Wenbo Yan, Xiaochun Li, Lihong Shi, Jingjun Xu, and Guangyin Zhang,Photorefractive properties of near-stoichiometric lithium niobate crystalsdoped with iron, Opt. Mat. 28 (2006) 212-215.

[32]Lihong Shi, Yongfa Kong*, WenboYan, Jun Sun, Shaolin Chen, Ling Zhang, Wanlin Zhang, Hongde Liu, Xiaochun Li,Xiang Xie, Di Zhao, Lei Sun, Zhanyin Wang, Jingjun Xu and Guangyin Zhang, Determination ofthe composition of lithium tantalate by means of Raman and OH⁻absorption measurements, Materials Chemistry and Physics, 95(2-3) (2006) 229-234.

[33]GAO Guo-Xiang, XU Jing-Jun, ZHANG Shu, LIU Wen-Hui, LIUHong-De, KONG Yong-Fa, CHEN Shao-Lin, ZHANG Guang-Yin, SUN Qian, Photo-InducedCarriers in Near-Stoichiometric LiNbO3:Fe Crystal,Chin. Phys. Lett. 23(2) (2006) 443-445.

[34]Shuqi Li, Shiguo Liu, YongfaKong*, Dongling Deng, Guangyu Gao, Yanbo Li, Hongchen Gao, Ling Zhang, ZihengHang, Shaolin Chen, and Jingjun Xu, Theoptical damage resistance and absorption spectra of LiNbO₃:Hfcrystals, J. Phys.: Condens. Matter 18(2006) 3527-3534.

[35]Wenbo Yan, Yongfa Kong*, Lihong Shi, Lei Sun, Hongde Liu,Xiaochun Li, Di Zhao, and Jingjun Xu, The influence of composition on the photorefractivecenters in pure LiNbO₃ at low light intensity, Appl. Opt. 45(11)(2006) 2453-2458.

[36]L. Wu, X.L. Chen, Y. Zhang,Y.F. Kong, J.J. Xu, Y.P. Xu, Ab initio structuredetermination of novel borate NaSrBO₃, Journal of Solid State Chemistry 179(2006) 1219-1224.

[37]Jun Sun, Yongfa Kong*, LingZhang, Wenbo Yan, Xueze Wang, Jingjun Xu, and Guangyin Zhang, Growth of largediameter nearly stoichiometric lithium niobate crystals by continuous meltsupplying system, J. Crystal Growth 292(2), 351-354 (2006).

[38]Shaolin Chen, Hongde Liu,Yongfa Kong*, Ziheng Huang, and Jingjun Xu, The high photorefractive sensitivityand fast response time of near-stoichiometric and MgO doped LiNbO₃:Fecrystal, Crys. Res.Tech. 41(8) 790-794 (2006).

[39]Shuqi Li, Shiguo Liu, Yongfa Kong*, Jingjun Xu, Guangyin Zhang, Enhanced photorefractive properties of LiNbO₃:Fe crystalsby HfO₂ co-doping, Appl. Phys. Lett., 89 (10), 101126 (2006)

[40]Wenbo Yan, Lihong Shi, Yongfa Kong*, Yufang Wang, Hongde Liu,Jingjun Xu, Shaolin Chen, Ling Zhang, Ziheng Huang, Shiguo Liu,and GuangyinZhang,Theelectrostatic depinning mechanism of domain wall for near-stoichiometric lithiumniobate crystals, J. Phys. D: Appl. Phys. 39(2006) 4245-4249

[41]Wenbo Yan, Yongfa Kong*, LihongShi, Lei Sun, Hongde Liu, Xiaochun Li, and Jingjun Xu, Shaolin Chen, Ling Zhang, Ziheng Huang, Shiguo Liu, and GuangyinZhang, Investigations on the centers participated in the UV light inducedabsorption for LiNbO₃ highly doped with Mg and Hf, Opt. Express14(22), 10898-10906 (2006). Colllected by Virtual Journal ofUltrafast Science –January 2007, Volume 5, Issue 8.

[42]Xiaochun Li,Yongfa Kong*, Hongde Liu, Lei Sun, Jingjun Xu, Shaolin Chen, Ling Zhang, ZihengHuang, Shiguo Liu, Guangyin Zhang, Origin of the generallydefined absorption edge of non-stoichiometric lithium niobate crystals, SolidState Commun. 141 (2007) 113-116.

[43]Shaolin Chen, Hongde Liu,Yongfa Kong*, Ziheng Huang, Jingjun Xu, and Guangyin Zhang, The resistanceagainst optical damage of near-stoichiometric LiNbO₃:Mg crystalsprepared by vapor transport equilibration, Opt. Mat. 29(2007) 885-888.

[44]Wenbo Yan, Hongjian Chen, LihongShi, Shiguo Liu, and Yongfa Kong, Investigations of the light-induced scattering variedwith HfO₂codoping in LiNbO₃:Fe crystals, Appl. Phys. Lett. 90, 211108 (2007).

[45]Liu Hong-De, Kong Yong-Fa*, Hu Qian, Wu Ri-Wen, Wang Wen-Jie, Li Xiao-Chun, Chen Shao-Lin, Liu Shi-Guo, Xu Jing-Jun, Light-induceddomain inversion in Mg-doped near stoichiometric lithium niobate crystals,Chin. Phys. Lett. 24(6) (2007) 1720-1723.

[46]Yongfa Kong*,Shiguo Liu, Yanjun Zhao, Hongde Liu, Shaolin Chen, and Jingjun Xu, Highly opticaldamage resistant crystal: Zirconium-oxide-doped lithium niobate, Appl. Phys. Lett.91, 081908 (2007).

[47]Xiaochun Li,Yongfa Kong*,Yuncai Wang,Lizhong Wang,Fucai Liu,Hongde Liu, Ya’nan An,Shaolin Chen,and Jingjun Xu, Nonvolatileholographic storage of near-stoichiometric LiNbO₃:Cu:Ce with greenlight, App. Opt. 46(31) (2007) 7620-7624.

[48]Wenbo Yan, Yangxian Li, Lihong Shi, Hongjian Chen, Shiguo Liu, LingZhang, Ziheng Huang, Shaolin Chen, and Yongfa Kong, Photochromic effect in LiNbO₃:Fe:Co, Optics Express15(25), 17010-17018 (2007).

[49]Li Wu, Yi Zhang, Yong-Fa Kong, Tong-QingSun, Jing-Jun Xu, Xiao-Long Chen, “Structure determination of novel orthoborateNaMgBO₃: A promising birefringent crystal”, Inorg. Chem. 46, 5207-5211 (2007).

[50]Li Wu, Yi Zhang, Xiao-Long Chen, Yong-Fa Kong, Tong-QingSun, Jing-Jun Xu, Y. P. Xu, “The Na₂O-SrO-B₂O₃diagram in the B-rich part and the crystal structure of NaSrB₅O₉”, J. Solid State Chem. 180, 1470-1475 (2007).

[51]L. Shi, W. Yan, and Y. Kong,OH^- absorption band in LiTaO₃with varied composition and hydrogenation, Eur. Phys. J. Appl. Phys. 40,77-81 (2007)

[52]Shu-Qi Chen, Wei-Ping Zang,Zhi-Bo Liu, Wen-Yuan Zhou, Yong-Fa Kong, Jian-Guo Tian，Methodfor measurements of second-order nonlinear optical coefficient based on Z-scan, Opt. Commun. 274 (2007) 213-217.

[53]Wenbo Yan, Lihong Shi, HongjianChen, Yangxian Li and Yongfa Kong, The UV-light-induced absorption in pureLiNbO₃ investigated by varying compositions, Journal of PhysicsD: Applied Physics, 41(8), 085410 (2008).

[54]Li Xiao-Chun, Kong Yong-Fa*,Wang Li-Zhongand Liu Hong-De, The twophotorefractive centres in iron doped nearlystoichiometric lithium niobate crystals, ChinesePhysics B, 17(3), 1014-1019 (2008).

[55]Yongfa Kong*,Shengqing Wu, Shiguo Liu, Shaolin Chen, and Jingjun Xu, Fastphotorefractive response and high sensitivity of Zr and Fe codoped LiNbO₃crystals, Appl. Phys. Lett.92, 251107 (2008).Collected by ScienceArchived, June26th, 2008.

[56]Wenjie Wang, Yongfa Kong*,Hongde Liu, Qian Hu, Shiguo Liu, Shaolin Chen, and Jingjun Xu, Light-induced domain reversal in doped lithium niobate crystals, J. Appl. Phys. 105, 043105 (2009)

[57]Xinzheng Zhang, Junqiao Wang,Baiquan Tang, Xinhui Tan, Romano A. Rupp, Leiting Pan, Yongfa Kong, Qian Sun,and Jingjun Xu, Optical trapping and manipulation of metallic micro/nanoparticlesvia photorefractive crystals, Opt. Express 17(12), 9981-9988 (2009).

[58]W. Wang, V. Roppo, K. Kalinowski, Y. Kong, D. N. Neshev, C. Cojocaru, J.Trull, R. Vilaseca, K. Staliunas, W. Krolikowski, S. M. Saltiel, and Yu.Kivshar, Third-harmonic generation via broadband cascading in disordered quadraticnonlinear media, Opt. Express 17(22),20117-20123 (2009).

[59]Yongfa Kong*, Fucai Liu, Tian Tian, Shiguo Liu, Shaolin Chen, RomanoRupp, and Jingjun Xu, Fast responsive nonvolatile holographic storage in LiNbO₃triply doped with Zr, Fe, and Mn, Opt. Lett. 34(24), 3896-3898 (2009).

[60]Fucai Liu, Yongfa Kong*, Wei Li, Hongde Liu, Shiguo Liu, Shaolin Chen,Xinzheng Zhang, Romano Rupp, and Jingjun Xu, High resistance againstultraviolet photorefraction in zirconium-doped lithium niobate crystals, Opt. Lett. 35(1), 10-12 (2010). Selectedas Image of the issue; and selected as Research Highlights by Nature Photonics (4, 128-129 (2010)).

[61]FeifeiXin, Guoquan Zhang,Fang Bo, Haifeng Sun, Yongfa Kong, Jingjun Xu,Tatyana Volk, and Natalia M. Rubinina,Ultravioletphotorefraction at 325 nm in doped lithium niobate crystals,J. Appl. Phys. 107, 033113 (2010).

[62]Wenbo Yan, Lihong Shi, Hongjian Chen, Xinzheng Zhang, and YongfaKong, Investigations on the UV photorefractivity of LiNbO₃:Hf, Opt.Lett. 35(4), 601-603 (2010).

[63]V. Roppo, W. Wang, K. Kalinowski, Y. Kong, C. Cojocaru, J. Trull, R.Vilaseca, M. Scalora,W. Krolikowski,and Yu. Kivshar, Therole of ferroelectric domain structure in second harmonic generation in randomquadratic media, Opt. Express 18(5), 4012-4022 (2010).

[64]Lizhong Wang, Shiguo Liu, Yongfa Kong*, ShaolinChen, Ziheng Huang, Li Wu, Romano Rupp, and Jingjun Xu, Increased optical damage resistance in Tin doped lithium niobate, Opt.Lett. 35(6),883-885 (2010). Selected as Image of the issue.

[65]FucaiLiu, Yongfa Kong*,Xinyu Ge,Hongde Liu, ShiguoLiu, Shaolin Chen, Romano Rupp, and Jingjun Xu, Improved sensitivityof nonvolatile holographic storage in triply doped LiNbO₃:Zr,Cu,Ce, Opt. Express 18(6), 6333-6339(2010).

[66]Li Wu, Jiancheng Sun, Yi Zhang, Shifeng Jin, Yongfa Kong,Jingjun Xu, Structure Determination and Relative Properties of Novel ChiralOrthoborate KMgBO₃, Inorg. Chem. 49(6). 2715-2720,(2010).

[67]HaoZeng, Yongfa Kong*, Hongde Liu, Shaolin Chen, Ziheng Huang, Xinyu GeandJingjun Xu, Light-induced super low electric field for domain reversal innear-stoichiometric magnesium-doped lithium niobate, J. Appl. Phys. 107, 063514 (2010).

[68]Tongqing Sun, Xiaodong Zhou, Xiaoqing Wang, Guangqiu Shen,Yongfa Kong, Jingjun Xu, Dezhong Shen, Crystal growth and characterization ofnon-centrosysmmetric polyphosphates, type III KNd(PO₃)₄and KGd(PO₃)₄, J. Crystal Growth 312, 1627–1631 (2010).

[69]Fucai Liu, T.Makino, H. Hiraga, T. Fukumura, Yongfa Kong, and M. Kawasaki, Ultrafast dynamics of excitons in delafossiteCuScO₂ thin films, Appl. Phys. Lett. 96, 211904 (2010). Collected by VirtualJournal of Ultrafast Science –June 2010, Volume 9, Issue 6.

[70]Wenbo Yan, Lihong Shi, Hongjian Chen, Xunan Shen, and YongfaKong, Light scattering induced by opposite microdomains in LiNbO₃:Fe:Hfcrystals, Opt.Express, 18(11) 11949-11954 (2010).

[71]Wenbo Yan, Lihong Shi, Hongjian Chen, Xunan Shen and YongfaKong, Investigations of the OH⁻ absorption bands in congruent andnear-stoichiometric LiNbO₃:Hf crystals, Euro Phys. Lett. 91(3), 36002 (2010).

[72]Meng Chen, Tongqing Sun, Hong Chen, Yu Zhang, Li Wu, YongfaKong, Jingjun Xu, Synthesis andluminescence properties of Yb³⁺ and Er³⁺ doped KLa(WO₄)₂nanoparticles,J. Solid StateChem., 183(9), 2161-2165 (2010).

[73]L. Wu, Y. Zhang, W. W. Su, Y. F. Kong, and J. J. Xu, Structuralstudy of nonlinear optical borates K_1−xNa_xSr₄(BO₃)₃(x£0.5), Powder Diffraction 25(S1),S11-S16 (2010).

[74]Wenjie Wang, Ksawery Kalinowski, Vito Roppo, Yan Sheng,Kaloian Koynov, Yongfa Kong, Crina Cojocaru, Jose Trull, Ramon Vilaseca, andWieslaw Krolikowski, Second- and third-harmonicparametric scattering in disordered quadratic media, J. Phys. B: At. Mol.Opt. Phys.43(21),215404 (2010).

[75]Wenjie Wang, Yan Sheng, Yongfa Kong, Ady Arie, and WieslawKrolikowski, Multiple Čerenkov second-harmonic waves in atwo-dimensional nonlinear photonic structure, Opt. Lett. 35(22) 3790-3792(2010).

[76]Hao Zeng, Yongfa Kong*, Tian Tian, Shaolin Chen, Ling Zhang,Tongqing Sun, Romano Rupp, and Jingjun Xu, Transcription of domain patterns in near-stoichiometric magnesium-dopedlithium niobate, Appl. Phys. Lett. 97, 201901 (2010). 《激光与光电子学进展》杂志“2010中国光学重要成果”

2011-2015

[77]Hongde Liu, Qirui Liang, Meiling Zhu, Wei Li, Shiguo Liu, LingZhang, Shaolin Chen, Yongfa Kong, and Jingjun Xu, An excellent crystal for highresistance against optical damage in visible-UV range: near-stoichiometriczirconium-doped lithium niobate, Opt. Express 19(3), 1743-1748 (2011). Selected asNewsbreaks by Laser Focus World (March 2011).

[78]Yinfeng Dong, Shiguo Liu, WeiLi, Yongfa Kong*, Shaolin Chen, and Jingjun Xu, Improved ultravioletphotorefractive properties of vanadium-doped lithium niobate crystals, Opt.Lett. 36(10), 1779-1781(2011).

[79]Yan Sheng, WenjieWang, Roy Shiloh, Vito Roppo, Yongfa Kong, Ady Arie, and Wieslaw Krolikowski, Čerenkovthird-harmonic generation in χ⁽²⁾ nonlinear photonic crystal, Appl.Phys. Lett. 98, 241114 (2011). Science Archived, June21st, 2011.

[80]Feifei Xin, Guoquan Zhang, Xinyu Ge, Shiguo Liu, Li Xuan,Yongfa Kong, and Jingjun Xu, Ultraviolet band edge photorefractivity in LiNbO₃:Sncrystals, Opt. Lett. 36(16),3163-3165 (2011).

[81]Hao Zeng, Yongfa Kong*, Xin Sun, Shaolin Chen, Tongqing Sun,and Jingjun Xu, Bending the ferroelectric domain wall by a bubble, J. Phys.: Condens. Matter23, 345901 (2011).

[82]Tongqing Sun, Yu Zhang,Xiaoqing Wang, YongfaKong, Jingjun Xu, Dezhong Shen, Growth and characterizations of acentric polyphosphateKGd_0.95Nd_0.05(PO₃)₄ crystals, Journal of Crystal Growth331(1), 68-71 (2011).

[83]ZidongPei, Qian Hu, Yongfa Kong*, Shiguo Liu, Shaolin Chen, andJingjun Xu, Investigation on p-typelithium niobate crystals, AIP Advances 1, 032171 (2011).

[84]Hongde Liu, Meiling Zhu, QiruiLiang, Wei Li, Shiguo Liu, Ling Zhang, Shaolin Chen, Yongfa Kong, and JingjunXu, In situ observation of light-assisted domain reversal in lithium niobatecrystals, Opt. Mater. Express 1, 1433-1438 (2011).

[85]Yi Zhang, Li Wu, Minyuan Ji,Biao Wang, Yongfa Kong, and Jingjun Xu, Structure and photoluminescenceproperties of KSr₄(BO₃)₃:Eu³⁺red-emitting phosphor, Opt. Mater. Express 2, 92-102 (2012).

[86]L. Wu, Y. Zhang, M. Y. Gui, P. Z. Lu, L. X. Zhao, S. Tian, Y.F. Kong, J. J. Xu, “Luminescence and Energy Transfer of a Color TunablePhosphor: Dy³⁺-, Tm³⁺-, and Eu³⁺-CoactivatedKSr₄(BO₃)₃ for Warm White UV LEDs”, J.Mater. Chem. 22, 6463-6470 (2012).

[87]Yinfeng Dong, Shiguo Liu, Yongfa Kong*, Shaolin Chen,Romano Rupp, and Jingjun Xu, Fast photorefractive response of vanadium-dopedlithium niobate in the visible region, Opt. Lett. 37(11), 1841-1843 (2012).

[88]F. Liu, T. Makino, T. Yamazaki, K. Ueno, A. Tsukazaki, T.Fukumura, Y. Kong, and M. Kawasaki, Ultrafast time-resolved Faraday rotation inEuO thin films, Phys. Rev. Lett. 108, 257401 (2012).

[89]Tian Tian, Yongfa Kong*, ShiguoLiu, Wei Li, Li Wu, Shaolin Chen, and Jingjun Xu, The photorefraction ofmolybdenum-doped lithium niobate crystals, Opt. Lett. 37(13), 2679-2681 (2012).

[90]Chao Zhang, Jin Yang,Feng Chen, Yongfa Kong, Optical damage of Zr:LiNbO₃ waveguidesproduced by proton implantation, Nucl. Instr. Meth. B 286, 209–212 (2012).

[91]T. Makino,F.LiuT. Yamasaki,Y.Kozuka,K. Ueno,A. Tsukazaki,T.Fukumura,Y. Kong,and M. Kawasaki, Ultrafastoptical control of magnetization in EuO thin films, Phys. Rev. B 86, 064403 (2012).

[92]Yongfa Kong*,Shiguo Liu, and Jingjun Xu, Recent advances in the photorefractionof doped lithium niobate crystals, Materials 5(10), 1954-1971 (2012). (Review)

[93]Tongqing Sun,Xiaodong Zhou, Yu Zhang, Shaolin Chen, Shiguo Liu, Yongfa Kong, Jingjun Xu, Growth and thermalproperties of tetragonal double tungstate KLa(WO₄)₂crystal, Mater. Res. Bull. 47(11), 3233–3237 (2012).

[94]Feifei Xin, Zhaohui Zhai, Xiaojie Wang, Yongfa Kong, JingjunXu, and Guoquan Zhang, Thresholdbehavior of the Einstein oscillator, electron-phonon interaction, band-edgeabsorption, and small hole polarons in LiNbO₃:Mg crystals, Phys.Rev. B 86, 165132 (2012).

[95]Shoujun Zheng, Yongfa Kong*, Hongde Liu, Shaolin Chen, LingZhang, Shiguo Liu, and Jingjun Xu, Pyroelectric effect in green light-assisteddomain reversal of Mg-doped LiNbO₃ crystals, Opt. Express 20(27),29131-29136 (2012).

[96]Tian Tian, Yongfa Kong*, ShiguoLiu, Wei Li, Shaolin Chen, Romano Rupp, and Jingjun Xu, Fast UV-Visphotorefractive response of Zr and Mg codoped LiNbO₃:Mo, Opt.Express 21(9), 10460-10466 (2013).

[97]Wenjie Wang^, YanSheng, Xiaoying Niu, Ming Huang, Shoujun Zheng, Yongfa Kong, Second harmonicČerenkov radiation in bulk birefringent quadratic medium without any χ⁽²⁾modulation, Optics & Laser Technology 58, 16–19(2014).

[98]Shoujun Zheng, Yongfa Kong*, Rong Zhang, Hongde Liu, ShaolinChen, Ling Zhang, Shiguo Liu, Romano Rupp, and Jingjun Xu, Green light directwriting of ferroelectric domains in Mg-doped LiNbO₃, Opt. Mater.Express 4, 272-279 (2014).

[99]Li Wu, Minyuan Ji, Hongrun Wang, Yongfa Kong,and Yi Zhang, Site occupancy and photoluminescence of Sm³⁺ inKSr₄(BO₃)₃:Sm³⁺ phosphors,Opt. Mater. Express 4, 1535-1544 (2014).

[100]TongqingSun, Yu Zhang, Pai Shan, Zichang Zhang, Shaolin Chen, Yongfa Kong, and JingjunXu, Growth, Structure, Thermal Properties and Spectroscopic Characteristics ofNd³⁺-Doped KGdP₄O₁₂ Crystal, PLoS ONE 9(6), e100922(2014).

[101]L. Wu, B. Wang, Y. Zhang, L. Li, R. Wang, H. Yi, Y. F. Kong,and J. J. Xu, Structure and photoluminescence properties of a rare-earth freered-emitting Mn²⁺-activated KMgBO₃, Dalton Trans. 43, 13845-13851(2014).

[102]Tongqing Sun, Pai Shan, Hong Chen,Xuanwen Liu, Hongde Liu, Shaolin Chen, Ya'an Cao, Yongfa Kong and Jingjun Xu,Growth and properties of anoncentrosymmetric polyphosphate CsLa(PO₃)₄ crystal withdeep-ultraviolet transparency, CrystEngComm 16, 10497–10504 (2014).

[103]Huan Yi, Fang Li, Li Wu, Liwei Wu, Hongrun Wang, Biao Wang, YiZhang, Yongfa Kong, and Jingjun Xu, Site occupancy and photoluminescenceproperties of Eu³⁺-activated Ba₂ZnB₂O₆phosphor, RSC Adv. 4, 64244–64251 (2014).

[104]Dahuai Zheng, Yongfa Kong, Shiguo Liu, Jiaying Yao, Ling Zhang,Shaolin Chen, Xu Jingjun, The photorefractive characteristics of bismuth-oxidedoped lithium niobate crystals, AIP Adv. 5, 017132 (2015).

[105]Yue Liu, Haonan Zhu, Zidong Pei, Yongfa Kong, and Jingjun Xu,Molecular dynamic simulations of surface morphology and pulsed laser depositiongrowth of lithium niobate thin films on silicon substrate, Chin. Phys. B 24(5), 056802 (2015).

[106] Yazhou Cheng, Jinman Lv, Shavkat Akhmadaliev, Shengqiang Zhou, Yongfa Kong, Feng Chen, Mid-infrared ridge waveguide in MgO:LiNbO₃ crystal produced by combination of swift O⁵⁺ ion irradiation and precise diamond blade dicing, Optical Materials 48, 209-214 (2015).

[107] Liwei Wu, Fangxin Zhang, Li Wu, Huan Yi, Hongrun Wang, Yi Zhang, Yongfa Kong, Jingjun Xu, Structure refinement and one-center luminescence of Eu³⁺ activated ZnBi₂B₂O₇under UV excitation, J. Alloy. Compd. 648, 500–506 (2015).

[108] Xiaojie Wang, Xiangming Liu, Fang Bo, Shaolin Chen, Jing Chen, Yongfa Kong, Jingjun Xu, and Guoquan Zhang, Photo-Hall effect in highly Mg-doped lithium niobate crystals, Appl. Phys. Lett. 107, 191102 (2015).

[109] Fang Bo, Jie Wang, Jiao Cui, Sahin Kaya Ozdemir, Yongfa Kong, Guoquan Zhang, Jingjun Xu, and Lan Yang, Lithium-Niobate–Silica Hybrid Whispering-Gallery-Mode Resonators,Adv. Mater. doi: 10.1002/adma.201504722.

2005年国家自然科学二等奖、

2001年津市自然科学一等奖、

2005年天津市技术发明二等奖、

2008年天津市劳动模范、

2012年天津市科技进步一等奖。

代表性成果：

• 生长了抗光损伤性能远优于“中国之星”的掺锆铌酸锂晶体，即使在紫外波段（351 nm），掺锆铌酸锂晶体仍然具有10⁵W/cm²以上的抗光损伤能力！从而首次将铌酸锂晶体在高光强下的非线性光学应用从可见拓展到紫外波段，该结果Optics Letters选为封面、被Nature Photonics选作ResearchHighlights、被Laser FocusWorld选入Newsbreaks栏目给予报道。

• 计并生长了具有优异抗光损伤性能的掺锡铌酸锂晶体，被Optics Letters选为封面；

• 提出铁电畴结构的转录技术，被《激光与光电子学进展》杂志评为“2010年中国光学重要成果”。

• 国际上生长首先出抗光损伤性能可与被誉为“中国之星”的高掺镁铌酸锂晶体相媲美的高掺铟铌酸锂晶体，且掺杂阈值低，为抗光折变及全息存储的研究开辟了另一广阔的天地，受到国际同行的重视，并已成为抗光损伤研究领域一个重要的方向，论文目前被他引百余次。

• 制成功的三维光盘存储材料的多项指标在国际上已属前列；生长了极具市场的大尺寸高均匀性光学级铌酸锂晶体；开发了具有自主知识产权的近化学计量比铌酸锂晶体生长技术。版专著一部；在Applied PhysicsLetters、Optics Letters、Optics Express等刊物上发表论文百余篇，他引八百余次；目前获得发明专利十四项，其中美国专利一项。曾获国家自然科学二等奖、天津市自然科学一等奖、天津市技术发明二等奖、天津市科技进步一等奖。