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

• 作 者: 邓洪祥 祖皓月 邬邵轶 孙凯 祖小涛
• 机 构: School of Physical Electronics,University of Electronic Science and Technology of China,Department o
• 出 处: Chinese Physics B
• 发表日期: 2014年02期
• 关键词: tunneling solids deviation cube regime scales intense photon transparency dramat

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.

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.