摘要
Nonlinear optical properties of intersubband electrons in a 3-level quantum well under intense terahertz field are investigated by using a density matrix approach. The results show that the terahertz fields with different frequencies cause the distinct modulations of the intersubband absorptions. The terahertz-indueed sideband and Autler-Towns splitting in the absorption spectrum are obtained, respectively for the terahertz-photon energy below and close to the transition energy between the ground and first excited state.
Nonlinear optical properties of intersubband electrons in a 3-level quantum well under intense terahertz field are investigated by using a density matrix approach. The results show that the terahertz fields with different frequencies cause the distinct modulations of the intersubband absorptions. The terahertz-indueed sideband and Autler-Towns splitting in the absorption spectrum are obtained, respectively for the terahertz-photon energy below and close to the transition energy between the ground and first excited state.
基金
Project supported by the National Science Fund for Distinguished Young Scholars of China （Grant Nos 60425415 and 605280058）, the Major Program of the National Natural Science Foundation of China （Grant No 10390162）, and the Shanghai Municipal Commission of Science and Technology of China （Grant Nos 03JC14082 and 05XD14020）.
