报告摘要：
The technique of two-dimensional Fourier-transform (2DFT) spectroscopy was originally developed in NMR and implemented in optical region in recent years. Since then, optical 2DFT spectroscopy has developed into a major tool to study the interactions and dynamics in various quantum systems. In this talk, I will present recent results on the study of the coherent optical response of potassium vapor in a thin transmission cell using this technique. Rephasing and non-rephasing spectra of the D1 and D2 transitions are obtained and compared to numerical simulations. Non-radiative Raman-like coherences are isolated using a different 2DFT projection. Also, unexpected two-quantum resonances are observed in potassium vapor using 2DFT SIII technique. These resonances are an indication of many-body interactions in the potassium vapor.
报告人简历：
戴星灿：1997年7月获清华大学物理系本科学位。而后在清华大学物理系攻读硕士学位并从事碱金属分子高激发态光谱的研究。于2000年7月获硕士学位后赴美国加利福尼亚大学伯克利分校攻读博士学位， 主要从事碱金属分子的波包动力学和相干控制的研究。在获得博士学位后，于2007年初到美国科罗拉多州大学JILA研究所作博士后，主要从事高密度碱金属原子和半导体纳米结构的多维傅里叶变换光谱的研究。于2010年3月起担任清华大学物理系Tenure-Track助理教授。 |
