Measuring vibrational coherence lifetimes in liquid methanol using transient coherent Raman scattering

22nd International Laser Physics Workshop

Meiselman, S.^1 ; Cohen, O.^2 ; Decamp, M.F.^1 ; Lorenz, V.O.^1

University of Delaware, Department of Physics and Astronomy, Newark, DE 19716, United States^1

Joint Quantum Institute, National Institute of Standards and Technology, University of Maryland, Gaithersburg, MD 20849, United States^2

关键词: Coherent Raman scattering;    Frequency domains;    Nonlinear spectroscopy;    Scattered photons;    Technique measures;    Vibrational coherences;    Vibrational lifetime;    Vibrational state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/497/1/012004/pdf
DOI  :  10.1088/1742-6596/497/1/012004

来源: IOP

【 摘 要 】

We demonstrate the measurement of vibrational coherence in liquids using transient coherent Raman scattering. This technique measures the coherence lifetime of vibrational states through the interference of time-delayed coherent Raman-scattered photons using low-power, non-resonant optical pulses. We measure the vibrational lifetime of the 1033 cm-1mode in liquid methanol. The resulting lifetime agrees with frequency-domain lineshape measurements. This technique is a complementary and in some cases simpler alternative to standard nonlinear spectroscopy techniques.