Wavelength dependent resonance Raman band intensity of broadband stimulated Raman spectroscopy of malachite green in ethanol

The Journal of Chemical Physics
Qiongyan CenZhaohui Wang

Abstract

Resonance broadband stimulated Raman spectroscopy of malachite green in ethanol has been performed. With a tuning picosecond visible laser source and a broadband Raman probe, the Raman gain and loss spectra have been measured simultaneously. By scanning the Raman pump across the first absorption band of the molecule, we found that the resonant Raman bands could be only seen when the pump laser tuned in the range of the red edge of the S1←S0 transition. Dispersive lineshapes of resonant Raman bands have been observed in the Raman loss spectra, while the line shape is normal (same as spontaneous Raman) in the Raman gain spectra. Although, the resonant bands in the loss spectrum are usually stronger than that in the gain spectrum, the band intensities of both loss and gain linearly increase with the pump energy. The relative magnitude of each corresponding resonant band in the Raman loss and gain varies with the pump wavelength. Mode specified Raman excitation profiles have been obtained through broadband stimulated Raman measurement.

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Citations

Jan 6, 2016·Scientific Reports·G BatignaniT Scopigno
Feb 26, 2016·The Journal of Physical Chemistry. a·B Jayachander RaoWolfgang Domcke
Nov 7, 2019·Physical Chemistry Chemical Physics : PCCP·Zhi-Chao Huang-FuZhao-Hui Wang
Feb 27, 2016·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Daniel R Dietze, Richard A Mathies
Sep 21, 2019·Physical Chemistry Chemical Physics : PCCP·Laura Cabo-FernandezLaurence J Hardwick
Aug 20, 2019·The Journal of Physical Chemistry. a·Matthew S BarclayChristopher G Elles
Sep 27, 2018·The Journal of Physical Chemistry. a·Timothy J QuincyChristopher G Elles

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