Non-Markovian dephasing of excitons in GaAs quantum wells
Non-Markovian dephasing of excitons in GaAs quantum wells
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DOI：
10.1016/j.jlumin.2006.01.040
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发表时间：
2006-07-01
影响因子：
3.6
通讯作者：
Minami, F
中科院分区：
文献类型：
--
作者：
Iwamatsu, A;Ogawa, Y;Minami, F
我们利用外差探测技术在GaAs多量子威尔斯上测量了时间分辨的光子回波信号。当产生光子回波信号的两个脉冲的时间间隔（延迟时间）短于0.4 ps时，观察到周期约为0.8 ps的振荡结构。当延迟时间大于0.6ps时，振荡结构消失。温度和激发密度的依赖性表明，这种振荡的起源是一个正常的激子和激子耦合特定的声学声子模式，这是确定通过计算Rytov模型之间的相互作用。(c)2006年由Elsevier B.V.出版
We measured time-resolved photon echo signals by using the heterodyne detection technique on GaAs multiple quantum Wells. Oscillation structure with a period of about 0.8 ps is observed when the time interval (delay time) of two pulses which generate the photon echo signal is shorter than 0.4 ps. The oscillating structure disappears when the delay time is longer than 0.6 ps. Temperature and excitation density dependence indicate that the origin of this oscillation is the interaction between a normal exciton and an exciton coupled with a specific acoustic phonon mode which is identified by calculating the Rytov model. (c) 2006 Published by Elsevier B.V.