Role of excitation-induced shift in the coherent optical response of semiconductors
Role of excitation-induced shift in the coherent optical response of semiconductors
复制标题
激发引起的位移在半导体相干光学响应中的作用
DOI：
--
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
S. Cundiff
中科院分区：
文献类型：
--
作者：
J. M. Shacklette;S. Cundiff
一个瞬态四波混频信号示出产生的激励引起的移位。在半导体中，该信号可以与由饱和、局部场或激励诱导的失相产生的信号相当或更强。使用修改后的光学布洛赫方程的计算表明，在瞬态四波混频光谱的多个峰值是一个签名的激发引起的移位有助于信号。我们从半导体多量子阱实验观察到这一点，并确认直接使用光谱分辨差分传输的移位的存在。
A transient four-wave-mixing signal is shown to arise from an excitation induced shift. In semiconductors, this signal can be comparable to or stronger than signals arising from saturation, local fields, or excitation induced dephasing. Calculations using modified optical Bloch equations show that multiple peaks in the transient four-wave-mixing spectrum are a signature of an excitation induced shift contributing to the signal. We observe this experimentally from a semiconductor multiple quantum well and confirm the presence of a shift directly using spectrally resolved differential transmission.