Broadband cavity-enhanced ultrafast spectroscopy
| Autor: | Myles C. Silfies, Thomas K. Allison, Grzegorz Kowzan, Neomi Lewis |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Proton Atomic Physics (physics.atom-ph) General Physics and Astronomy Physics::Optics FOS: Physical sciences 02 engineering and technology 010402 general chemistry 01 natural sciences Physics - Atomic Physics Molecular dynamics Physics - Chemical Physics Ultrafast laser spectroscopy Cluster (physics) Molecule Physical and Theoretical Chemistry Spectroscopy Chemical Physics (physics.chem-ph) Spectrometer business.industry 021001 nanoscience & nanotechnology 0104 chemical sciences Optoelectronics 0210 nano-technology business Ultrashort pulse Physics - Optics Optics (physics.optics) |
| DOI: | 10.48550/arxiv.2102.04981 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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