Broadband cavity-enhanced ultrafast spectroscopy

Abstract

Broadband ultrafast optical spectroscopy methods, such as transient absorption spectroscopy and 2D spectroscopy, are widely used to study molecular dynamics. However, these techniques are typically restricted to optically thick samples, such as solids and liquid solutions. In this article we discuss a cavity-enhanced ultrafast transient absorption spectrometer covering almost the entire visible range with a detection limit of $\Delta$OD $<1\times 10^{-9}$, extending broadband all-optical ultrafast spectroscopy techniques to dilute beams of gas-phase molecules and clusters. We describe the technical innovations behind the spectrometer and present transient absorption data on two archetypical molecular systems for excited-state intramolecular proton transfer, 1'-hydroxy-2'-acetonapthone and salicylideneaniline, under jet-cooled and Ar cluster conditions.

References in corpus (8)

• Ultrafast Internal Conversion in Ethylene I. The Excited State Lifetime
• Ultrafast Internal Conversion in Ethylene. II. Mechanisms and Pathways for Quenching and Hydrogen Elimination
• XUV Frequency Combs via Femtosecond Enhancement Cavities
• Cavity-Enhanced Ultrafast Transient Absorption Spectroscopy
• High-power ultrafast Yb:fiber laser frequency combs using commercially available components and basic fiber tools
• Cavity-enhanced ultrafast two-dimensional spectroscopy using higher-order modes
• Tunable visible frequency combs from a Yb-fiber-laser-pumped optical parametric oscillator
• Widely tunable cavity-enhanced frequency combs

Cited by in corpus (5)

• Ultrafast internal conversion and photochromism in gas-phase salicylideneaniline
• Simulating Ultrafast Transient Absorption Spectra from First Principles using a Time-Dependent Configuration Interaction Probe
• Controlling rotationally-resolved two-dimensional infrared spectra with polarization
• Theory of rotationally resolved two-dimensional infrared spectroscopy including polarization dependence and rotational coherence dynamics
• Photon echo in ring cavity: pulse area approach