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

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Abstract

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.

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Acknowledgments

This work was supported by China Academy of Engineering Physics Terahertz Science and Technology Fund Program (no. CAEPTHZ201305), Program for Innovation Team of the Education Department of Sichuan Province, China (no. 13Td0048), and the Joint Funds for Collaborative Innovation of China Academy of Engineering Physics and Sichuan University (no. xtcx2013003).

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Authors and Affiliations

  1. School of Electronics and Information Engineering, Sichuan University, Chengdu, 610065, China

    Qinglong Meng, Zheqiang Zhong, Junli Yu & Bin Zhang

  2. School of Physics and Engineering Technology, Chengdu Normal University, Chengdu, 611130, China

    Rong Ye

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  1. Qinglong Meng
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  2. Rong Ye
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  3. Zheqiang Zhong
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  4. Junli Yu
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  5. Bin Zhang
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Correspondence to Bin Zhang.

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Meng, Q., Ye, R., Zhong, Z. et al. Analysis on THz Radiation Generation Efficiency in Optical Rectification by Tilted-Pulse-Front Pumping. J Infrared Milli Terahz Waves 36, 866–875 (2015). https://doi.org/10.1007/s10762-015-0186-0

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  • DOI: https://doi.org/10.1007/s10762-015-0186-0

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