Sadeghi S M, Li W
Department of Physics, University of Alabama in Huntsville, Huntsville, AL 35899, USA.
J Phys Condens Matter. 2009 Apr 15;21(15):155801. doi: 10.1088/0953-8984/21/15/155801. Epub 2009 Mar 17.
Coherently controlled optical processes have been extensively studied in various systems including atoms, quantum wells and quantum dots. In this study we investigate such processes in Bragg multi-quantum well resonant (active) photonic bandgaps, wherein the dipole-dipole interwell interaction couples different quantum wells together, forming supperradiant exciton modes. Our results show that in such systems one can use an infrared laser beam to replace the collective superradiant mode with an electromagnetically induced transparency mode, demonstrating infrared switching of an active photonic bandgap to a hybrid system. Such a hybrid system consists of a passive photonic bandgap and an electromagnetically induced transparency band window superimposed on each other. A detailed study of the interplay between the collective and infrared-induced exciton excitations of quantum wells in Bragg multi-quantum well resonant photonic bandgap structures is presented.
相干控制光学过程已在包括原子、量子阱和量子点在内的各种系统中得到广泛研究。在本研究中，我们研究了布拉格多量子阱共振（有源）光子带隙中的此类过程，其中偶极-偶极阱间相互作用将不同的量子阱耦合在一起，形成超辐射激子模式。我们的结果表明，在这样的系统中，可以使用红外激光束将集体超辐射模式替换为电磁诱导透明模式，证明有源光子带隙到混合系统的红外切换。这样的混合系统由一个无源光子带隙和一个相互叠加的电磁诱导透明带窗口组成。本文详细研究了布拉格多量子阱共振光子带隙结构中量子阱的集体和红外诱导激子激发之间的相互作用。
