High‐efficiency stimulated Raman scattering from alcohols: theory and experiments

Abstract

The coherent Raman emission from primary alcohols [CH 3 (CH 2 ) n OH, n = 0-10], 2-propyl alcohol and tert-butyl alcohol was studied using a frequency-doubled Nd : YAG pump laser (532 nm). We show that increases in the chain length (CH 2 groups) and the number of CH 3 groups in the alcohols (CH 3 > CH 2 ) enhance the Raman emission efficiency. Theoretical density functional theory (DFT) calculations and frequency scaling allow one to associate the vibrational wavenumbers with the molecular fragment responsible for the vibration. We obtained good agreement between the observed phenomena and the predictions of the theory.

Recent Advances in linear and nonlinear Raman spectroscopy I

“…Tulej et al 142 introduced a novel technique for photofragment excitation spectroscopy by applying resonant-enhanced DFWM and laser-induced fluorescence. 145 Taking advantage of the coherent Raman emission from stimulated Raman generation, Echevarria et al 146 showed that increases in the chain length and the number of CH 3 groups in alcohols enhance the Raman emission efficiency. The low-wavenumber spectrum of liquid water has been investigated with four-photon coherent spectroscopy to interrogate the orientational motion of the H 2 O molecule.…”

Multifrequency stimulated Raman scattering in ethanol under picosecond laser excitation

“…It was estimated by measuring the energy of SRS components with radiation thermoelements and amounted to 45% ± 10% and 28% ± 10% for the 1st and 2nd Stokes SRS components, respectively. The conversion efficiency of laser radiation (λ = 532 nm) into the 1st Stokes component of SRS of ethanol relative to SRS on the symmetric stretching vibration of OH water was theoretically calculated and satisfactory agreement with experiment was obtained [7]. Article [8] is devoted to the experimental observation of SRS in ethanol for the backscattering geometry.…”

“…A number of works have been devoted to the study of the SRS phenomenon in ethanol [5][6][7][8][9][10]. In [5], using a Tektronix 519 oscilloscope, the efficiency of conversion of exciting laser radiation with a wavelength of 530 nm into the 1st Stokes component of SRS in ethanol was estimated for the 1st time.…”