Pulse-induced quantum interference of intersubband transitions in coupled quantum wells
Pulse-induced quantum interference of intersubband transitions in coupled quantum wells
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DOI：
10.1063/1.1638881
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发表时间：
2004-01
影响因子：
4
通讯作者：
T. Müller;W. Parz;G. Strasser;K. Unterrainer
中科院分区：
文献类型：
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作者：
T. Müller;W. Parz;G. Strasser;K. Unterrainer
本文报道了耦合量子阱半导体结构中瞬态子带间吸收的测量结果。脉冲带间激发被用来制备电子子带三能级系统的两个最低态的相干布居。中红外时域光谱探测到的上态的时间依赖性吸收。对于某些泵浦探测延迟时间，我们观察到的子带间的吸收光谱的量子干涉的典型签名：区域减少或增强的吸收。
We report the measurement of the transient intersubband absorption in a coupled quantum well semiconductor structure. Pulsed interband excitation is used to prepare a coherent population in the two lowest states of a three level system of electronic subbands. The time-dependent absorption to the upper state is probed by midinfrared time-domain spectroscopy. For certain pump–probe delay times we observe in the intersubband absorption spectra typical signatures of quantum interference: regions with reduced or enhanced absorption.