量子阱在沿其平面方向偏振太赫兹波驱动下子带间光吸收

摘要

The intersubband optical absorption of a semiconductor quantum well driven by an in-plane terahertz electric field is investigated theoretically by employing the extended semiconductor Bloch equations.Our results show that in-plane polarized terahertz fields induce a variety of behavior in the absorption spectra,including terahertz replicas of the main absorption peak and the dynamical Franz-Keldysh effect.The dependence of the absorption of the probe field on frequency and phase of the terahertz field is also very remarkable.%利用半导体布洛赫方程,讨论了量子阱在沿其平面方向偏振的太赫兹场驱动下的光学吸收谱.研究结果揭示了半导体量子阱在沿平面方向偏振的强太赫兹场驱动下吸收谱的一些新奇效应,如主吸收的太赫兹边带、动态弗兰兹-凯尔迪什效应.太赫兹场的频率及其相位对探测场吸收谱的影响也很显著.