Analysis on THz Radiation Generation Efficiency in Optical Rectification by Tilted-Pulse-Front Pumping

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• 作者：Qinglong Meng ; Rong Ye ; Zheqiang Zhong…
• 关键词：Terahertz ; Nonlinear optics ; Optical rectification ; Terahertz absorption ; Generation efficiency
• 刊名：International Journal of Infrared and Millimeter Waves
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：36
• 期：9
• 页码：866-875
• 全文大小：610 KB
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• 作者单位：Qinglong Meng (1)
  Rong Ye (2)
  Zheqiang Zhong (1)
  Junli Yu (1)
  Bin Zhang (1)
  
  1. School of Electronics and Information Engineering, Sichuan University, Chengdu, 610065, China
  2. School of Physics and Engineering Technology, Chengdu Normal University, Chengdu, 611130, China
  
• 刊物类别：Physics and Astronomy
• 刊物主题：None Assigned
• 出版者：Springer New York
• ISSN：1866-6906

文摘

Optical rectification is one of the most important techniques for efficient terahertz (THz) radiation generation. However, the strong THz absorption caused by the free electrons in nonlinear crystal limits the further increasing of the THz radiation generation efficiency. The interaction mechanism between the femtosecond laser and the nonlinear crystal has been analyzed and the related theoretical model has been built up. And the theoretical model of the THz radiation generation efficiency in optical rectification by tilted-pulse-front pumping has also been built. On the basis, the influence of the central wavelength, the pulse duration, and the temperature on the THz radiation generation efficiency has been analyzed quantitatively. The results show that the THz radiation generation efficiency increases first and then decreases with the increasing of the intensity of pump pulse. In addition, the maximum THz radiation generation efficiency can be achieved by cryogenic temperatures and the optimized parameters of the pump pulses and the nonlinear crystal.