论文标题
通过低温2D光谱测量的CDSE量子点的跳动信号
Beating signals in CdSe quantum dots measured by low-temperature 2D spectroscopy
论文作者
论文摘要
超快光谱的进步可以提供涉及非平凡量子相关性及其演变的动态。在相干的2D光谱中，信号的振荡时间依赖性是这种量子动力学的签名。在这里，我们研究了77 K处的CDSE量子点（CDSE QDS）的电子相干2D光谱的这种跳动信号。根据它们的正和负傅立叶成分，分析了跳动信号。我们得出的结论是，殴打起源于CDSE QD的连贯lo-phonon。没有确定Lo-Phonon频率的量子点大小依赖性的证据。
Advances in ultrafast spectroscopy can provide access to dynamics involving nontrivial quantum correlations and their evolutions. In coherent 2D spectroscopy, the oscillatory time dependence of a signal is a signature of such quantum dynamics. Here we study such beating signals in electronic coherent 2D spectroscopy of CdSe quantum dots (CdSe QDs) at 77 K. The beating signals are analyzed in terms of their positive and negative Fourier components. We conclude that the beatings originate from coherent LO-phonons of CdSe QDs. No evidence for the quantum dot size dependence of the LO-phonon frequency was identified.
