Open AccessElectronically resonant third-order sum frequency generation spectroscopy using a nanosecond white-light supercontinuum
Author(s) -
Hiroki Segawa,
Naoki Fukutake,
Philippe Leproux,
Vincent Couderc,
Toshio Ozawa,
Hideaki Kano
Publication year - 2014
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.22.010416
Subject(s) - supercontinuum , optics , sum frequency generation , nanosecond , spectroscopy , high harmonic generation , spectral line , broadband , spectrometer , second harmonic generation , nonlinear optics , physics , materials science , optoelectronics , wavelength , laser , photonic crystal fiber , quantum mechanics , astronomy
Third-order sum frequency generation (TSFG) is one of the third-order nonlinear optical processes, and has the generation mechanism analogous to third harmonic generation (THG). By using a white-light supercontinuum, we can obtain broadband multiplex TSFG spectra. In the present study, we developed an electronically resonant TSFG spectrometer, and applied it to obtain TSFG spectra of hemoproteins. Analyzed TSFG ratio spectra clearly showed the resonant enhancement attributable to the electronic state of hemoproteins. This is a promising method for the imaging of electronic states of molecules inside living cells or tissues.