Spectral watermarking in femtosecond stimulated Raman spectroscopy: resolving the nature of the carotenoid S-star state

0488131 - FZÚ 2018 RIV GB eng J - Journal Article
Kloz, Miroslav - Weissenborn, J. - Polívka, T. - Frank, H.A. - Kennis, J.T.M.
Spectral watermarking in femtosecond stimulated Raman spectroscopy: resolving the nature of the carotenoid S-star state.
Physical Chemistry Chemical Physics. Roč. 18, č. 21 (2016), s. 14619-14628. ISSN 1463-9076. E-ISSN 1463-9084
R&D Projects: GA MŠMT EF15_008/0000162; GA MŠMT LQ1606
Grant - others:ELI Beamlines(XE) CZ.02.1.01/0.0/0.0/15_008/0000162
Institutional support: RVO:68378271
Keywords : beta-carotene * excited-state * ultrafast dynamics * resonance Raman * excitation * conversion * pathway * laser * S-1
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 4.123, year: 2016

A new method for recording femtosecond stimulated Raman spectra was developed that dramatically improves and automatizes baseline problems. Instead of using a narrowband Raman source, the experiment is performed using shaping of a broadband source. This allows locking the signal into carefully crafted watermarks that can be recovered from measured data with high fidelity. The approach uses unique properties of Raman scattering, thus allowing a direct recording of stimulated Raman signals with robust rejection of baselines and fixed-pattern-noise. Low cost technology for generating required pulse-shapes was developed and demonstrated. The methodology is applicable to any Raman experiment but primarily targets Femtosecond Stimulated Raman spectroscopy (FSRS) where a tack of robust methods for parasitic signal rejection has been a major obstacle in the practical development of the field in the last decade.
Permanent Link: http://hdl.handle.net/11104/0282750