文献类型：期刊文献

英文题名：The effect of two-photon absorption and optical excitation area on the generation of THz radiation

作者：Xing, Qirong[1,2]; Lang, Liying[1,2]; Tian, Zhen[1,2]; Zhang, Ning[1,2]; Li, Shuxin[1,2]; Wang, Kai[1,2]; Chai, Lu[1,2]; Wang, Qingyue[1,2]

通讯作者：Zhang, N[1]

机构：[1]Tianjin Univ, Ultrafast Laser Lab, Sch Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China;[2]Tianjin Univ, Key Lab Optoelect Informat & Tech Sci, Minist Educ, Tianjin 300072, Peoples R China

第一机构：Tianjin Univ, Ultrafast Laser Lab, Sch Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China

通讯机构：[1]corresponding author), Beijing Union Univ, Inst Informat Technol, Beijing 100101, Peoples R China.|[1141734]北京联合大学智慧城市学院;[11417]北京联合大学;

年份：2006

卷号：267

期号：2

起止页码：422-426

外文期刊名：OPTICS COMMUNICATIONS

收录：;EI(收录号：20064410211221);Scopus(收录号：2-s2.0-33750297450);WOS:【SCI-EXPANDED(收录号:WOS:000242100400020)】；

基金：This work was supported by National Natural Science Foundation of China (#60278002 and #60578037), Opening project (#2005-22) of the Key Laboratory of Optoelectronics Information and Technical Science (University of Tianjin), Ministry of Education, Subject Development Special Foundation of Tianjin University, and National Key Basic Research Special Foundation (#G1999075201).

语种：英文

外文关键词：THz radiation; two-photon absorption; optical excitation area; ZnTe

摘要：It was found experimentally that the THz radiation throughput based on optical rectification is strongly related to the optical excitation size in a ZeTe emitter. The factors affecting the THz radiation throughput are investigated in detail both experimentally and theoretically. By taking into account optical rectification, diffraction and two-photon absorption effects, a theoretical model is established to describe the emitting field intensity of THz radiation. There is excellent agreement between the theoretical results and the experimental data under high excitation power. Both theoretical and experimental results demonstrate that there is a trade-off between these three effects for THz radiation, and that in order to increase the THz radiation throughput based on optical rectification, one should choose suitable excitation size under a given pump power. (c) 2006 Elsevier B.V. All rights reserved.