中国物理B ›› 2014, Vol. 23 ›› Issue (2): 27801-027801.doi: 10.1088/1674-1056/23/2/027801

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Red-shift law of intense laser-induced electro-absorption in solids

邓洪祥a, 祖皓月a, 邬邵轶a, 孙凯b, 祖小涛a   

  1. 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
  • 收稿日期:2013-04-11 修回日期:2013-05-06 出版日期:2013-12-12 发布日期:2013-12-12
  • 基金资助:
    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).

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   

  1. 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
  • Received:2013-04-11 Revised:2013-05-06 Online:2013-12-12 Published:2013-12-12
  • Contact: Deng Hong-Xiang, Sun Kai, Zu Xiao-Tao E-mail:denghong@umich.edu;kaisun@umich.edu;xtzu@uestc.edu.cn
  • About author:78.47.-P; 72.20.Ht; 42.65.Ky; 78.40.Fy
  • Supported by:
    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).

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摘要： 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.

关键词: laser-induced electro-absorption, red shift of absorption edge in solids, multi-photon process, pump–, probe technology

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.

Key words: laser-induced electro-absorption, red shift of absorption edge in solids, multi-photon process, pump–probe technology

中图分类号:  (Spectroscopy of solid state dynamics)

  • 78.47.-p
72.20.Ht (High-field and nonlinear effects) 42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation) 78.40.Fy (Semiconductors)