Electromagnetically induced transparency in asymmetric double quantum wells
Electromagnetically induced transparency in asymmetric double quantum wells
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DOI：
10.1140/epjb/e20020133
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发表时间：
2002-05
期刊：
影响因子：
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通讯作者：
L. Silvestri;F. Bassani;G. Czajkowski;B. Davoudi
中科院分区：
文献类型：
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作者：
L. Silvestri;F. Bassani;G. Czajkowski;B. Davoudi
本文介绍了如何计算非对称双量子阱在子带间电子跃迁区域的非线性光学吸收谱。该方法采用微观计算电子-电子和电子-声子散射率引起的退相和宏观真实的密度矩阵方法计算电磁场和极化率。极化退相和由于电子-电子相互作用的拉比频率的修正也被考虑在内。适当选择量子阱的宽度和驱动场，我们得到电磁感应透明。当单个驱动场被谐振地施加到第二和第三子带之间的过渡时，这种透明性具有非常窄的线宽。在两个共振驱动场或第一和第三子带之间的驱动场共振的情况下，我们在整个吸收光谱上获得大的透明度增强。给出了GaAs/GaAlAs量子阱的结果，并提出了实验。
We show how to compute nonlinear optical absorption spectra of an Asymmetric Double Quantum Well (ADQW) in the region of intersubband electronic transitions. The method uses the microscopic calculation of the dephasing due to electron-electron and electron-phonon scattering rates and the macroscopic real density matrix approach to compute the electromagnetic fields and susceptibilities. The polarization dephasing and the corrections to the Rabi frequencies due to the electron-electron interaction are also taken into account. For a proper choice of the QW widths and of the driving fields we obtain electromagnetically induced transparency. This transparency has a very narrow linewidth when a single driving field is applied resonant to the transition between the second and the third subband. In the case of two resonant driving fields or of a driving field resonant between the first and third subband we obtain a large transparency enhancement over the entire absorption spectrum. Results are given for GaAs/GaAlAs QWs and experiments are proposed.