Open AccessBroadband ultrafast spectroscopy using a photonic crystal fiber: application to the photophysics of malachite green
Author(s) -
Jérémie Léonard,
Nhan Lecong,
Jean-Pierre Likforman,
O. Crégut,
Stefan Haacke,
Pierre Viale,
Philippe Leproux,
Vincent Couderc
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.016124
Subject(s) - materials science , femtosecond , optics , ultrashort pulse , photonic crystal fiber , malachite green , full width at half maximum , optoelectronics , spectroscopy , ultrafast laser spectroscopy , supercontinuum , laser , physics , chemistry , wavelength , organic chemistry , adsorption , quantum mechanics
Femtosecond single-pulsed supercontinua (SC) are produced in a short sub-cm piece of photonic crystal fiber. The SC span from 450 nm to more than 1.1 mum with 1-nJ energy injection. UV light down to 340 nm is observed with increased injection power. Using such a single-pulsed SC we implemented a compact transient absorption spectrometer with broadband detection and 150-fs FWHM time resolution to monitor the ultrafast dynamics of the electronic states of malachite green in ethanol excited to the S(2) state. The full spectral evolution is observed from 450 nm to 1050 nm, with high sensitivity and a signal-to-noise ratio as high as 1000.