In impulsive stimulated Raman scattering, vibrational oscillations, coherently stimulated by a femtosecond Raman pulse, are monitored in real time and read out as intensity modulations in the transmission of a temporally delayed probe pulse. Critically, in order to retrieve broadband Raman spectra, a fine sampling of the time delays between the Raman and probe pulses is required, making conventional ISRS ineffective for probing irreversible phenomena and/or weak scatterers typically demanding long acquisition times, with signal-to-noise ratios that crucially depend on the pulse fluences and overlap stabilities. To overcome such limitations, here we introduce the chirped-based impulsive stimulated raman scattering (CISRS) technique. Specifically, we show how introducing a chirp in the probe pulse can be exploited for recording the Raman information without the need to scan over the Raman-probe pulse delay. We then experimentally demonstrate with a few examples how to use the introduced scheme to measure Raman spectra.

Broadband impulsive stimulated Raman scattering based on a chirped detection / Batignani, G.; Ferrante, C.; Fumero, G.; Scopigno, T.. - In: THE JOURNAL OF PHYSICAL CHEMISTRY LETTERS. - ISSN 1948-7185. - 10:24(2019), pp. 7789-7796. [10.1021/acs.jpclett.9b03061]

Broadband impulsive stimulated Raman scattering based on a chirped detection

Batignani G.
Primo
;
Ferrante C.
Secondo
;
Fumero G.
Penultimo
;
Scopigno T.
Ultimo
2019

Abstract

In impulsive stimulated Raman scattering, vibrational oscillations, coherently stimulated by a femtosecond Raman pulse, are monitored in real time and read out as intensity modulations in the transmission of a temporally delayed probe pulse. Critically, in order to retrieve broadband Raman spectra, a fine sampling of the time delays between the Raman and probe pulses is required, making conventional ISRS ineffective for probing irreversible phenomena and/or weak scatterers typically demanding long acquisition times, with signal-to-noise ratios that crucially depend on the pulse fluences and overlap stabilities. To overcome such limitations, here we introduce the chirped-based impulsive stimulated raman scattering (CISRS) technique. Specifically, we show how introducing a chirp in the probe pulse can be exploited for recording the Raman information without the need to scan over the Raman-probe pulse delay. We then experimentally demonstrate with a few examples how to use the introduced scheme to measure Raman spectra.
Coherent Raman Spectroscopy
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Broadband impulsive stimulated Raman scattering based on a chirped detection / Batignani, G.; Ferrante, C.; Fumero, G.; Scopigno, T.. - In: THE JOURNAL OF PHYSICAL CHEMISTRY LETTERS. - ISSN 1948-7185. - 10:24(2019), pp. 7789-7796. [10.1021/acs.jpclett.9b03061]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1360936
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