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Nonlinear distortion and spatial dispersion of intense terahertz generation in lithium niobate via the tilted pulse front technique

查看全文 作　　者：BAOLONG [1,2]ZHANG;SHANGQING [1,2]LI;SHUSU [3]CHAI;XIAOJUN [3]Wu;JINGLONG [1]MA;LIMING [1,2,4]CHEN;YUTONG [1,2,4]LI 高影响力作者 机构地区：[1]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;[2]School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;[3]School of Electronic and Information Engineering, Beihang University, Beijing 100191, China;[4]Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China高影响力机构 出　　处：《Photonics Research》索引2018年第6卷第10期,共6页高影响力期刊 基　　金：National Basic Research Program of China(2013CBA01501);National Natural Science Foundation of China(NSFC)(11334013,11520101003,11861121001,U1530150);Strategic Priority Research Program of the Chinese Academy of Sciences(CAS)(XDB07030300,XDB16010200,XDB17030500);National Science Foundation(NSF)(0968895,1102301,1263236);863 Program(2013AA014402);“Zhuoyue” Program(ZG216S1807);“Qingba” Program(KG12052501,ZG226S1832) 摘　　要：We systematically investigate the influences of the input infrared spectrum, chirp, and polarization on the emitted intense terahertz spectrum and spatial dispersion in lithium niobate via optical rectification. The terahertz yield and emission spectrum depend on both the chirp and spectrum of the input pump laser pulses. We also observe slight non-uniform spatial dispersion using a knife-edge measurement, which agrees well with the original predictions. The possible mechanism is the nonlinear distortion effect caused by high-energy laser pumping.Our study is very important and useful for developing intense terahertz systems with applications in extreme terahertz sciences and nonlinear phenomena. 关 键 词：红外光谱 激光技术 发展现状 通讯技术
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