Widely Tunable Cavity-Enhanced Ultrafast Spectroscopy

Speaker:  Yuning Chen, Stony Brook

Program Description:
Ultrafast optical spectroscopy methods, such as transient absorption spectroscopy and 2D spectroscopy, are typically restricted to optically thick samples, such as solids and liquid solutions. We have developed a technique, Cavity-Enhanced Ultrafast Spectroscopy, to study dynamics in a molecular beam with femtosecond temporal resolution. By coupling frequency combs into optical cavities, we previously demonstrated ultrafast transient absorption measurements with a detection limit of ∆OD = 2×10-10 (10-9/ÖHz). [1] In this talk, I will present the recent progress towards a widely tunable version of this spectrometer. I will discuss the technical details of this spectrometer and its application to jet-cooled molecules and clusters.