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Red-shift law of intense laser-induced electro-absorption in solids |
Deng Hong-Xiang (邓洪祥)a, Zu Hao-Yue (祖皓月)a, Wu Shao-Yi (邬邵轶)a, Sun Kai (孙凯)b, Zu Xiao-Tao (祖小涛)a |
a School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China; b Department of Materials Engineering and Sciences, University of Michigan, Ann Arbor, MI 48109, USA |
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Abstract A theoretical study on the red-shift of laser-induced electro-absorption is presented. It is found that laser-induced red-shift scales with the cube root of the pump laser intensity in the optical tunneling regime and has an obvious deviation from this scale in the multi-photon regime. Our results show that in the optical tunneling regime, the laser-induced red shift has the same law as that in the direct current (DC) approximation. Though the scales are the same in the optical tunneling regime, the physical pictures in the two cases are quite different. The electro-absorption in the DC case is a tunneling-assisted transition process, while the laser-induced electro-absorption is a mixed multi-photon process.
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Received: 11 April 2013
Revised: 06 May 2013
Accepted manuscript online:
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PACS:
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78.47.-p
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(Spectroscopy of solid state dynamics)
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72.20.Ht
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(High-field and nonlinear effects)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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78.40.Fy
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(Semiconductors)
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Fund: Project supported by the Fundamental Research Funds for the Central Universities, China (Grant No. A735496), the National Natural Science Foundation of China (Grant No. 61178018), and the Ph. D. Funding Support Program of the Education Ministry of China (Grant No. 20110185110007). |
Corresponding Authors:
Deng Hong-Xiang, Sun Kai, Zu Xiao-Tao
E-mail: denghong@umich.edu;kaisun@umich.edu;xtzu@uestc.edu.cn
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About author: 78.47.-P; 72.20.Ht; 42.65.Ky; 78.40.Fy |
Cite this article:
Deng Hong-Xiang (邓洪祥), Zu Hao-Yue (祖皓月), Wu Shao-Yi (邬邵轶), Sun Kai (孙凯), Zu Xiao-Tao (祖小涛) Red-shift law of intense laser-induced electro-absorption in solids 2014 Chin. Phys. B 23 027801
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