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Vibrational spectroscopy and imaging with non-resonant coherent anti-Stokes Raman scattering: double stimulated Raman scattering scheme

Authors
Choi, Dae SikKim, Chang HoLee, TaegonNah, SangheeRhee, HanjuCho, Minhaeng
Issue Date
5-8월-2019
Publisher
OPTICAL SOC AMER
Citation
OPTICS EXPRESS, v.27, no.16, pp.23558 - 23575
Indexed
SCIE
SCOPUS
Journal Title
OPTICS EXPRESS
Volume
27
Number
16
Start Page
23558
End Page
23575
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/63558
DOI
10.1364/OE.27.023558
ISSN
1094-4087
Abstract
We introduce a new coherent anti-Stokes Raman scattering (CARS) suppression scheme based on measuring a non-resonant CARS loss signal by three-beam (pump-Stokes-depletion) double stimulated Raman scattering (SRS) processes, which can be potentially of use for super-resolution Raman microscopy. In the converging configuration with employing both pump-depletion and Stokes-depletion SRS processes, we obtained approximately 94% suppression of non-resonant CARS signal. which is about 1.5 times more efficient than that with the parallel configuration with pump-Stokes and pump-depletion SRS processes. Such an enhanced suppression efficiency in the converging configuration results from a simultaneous loss of photons both in the pump and Stokes beams by double SRS processes, leading to an efficient suppression of the pump-Stokes-pump CARS signal. Based on the present method, we further propose two potential applications: (1) non-resonant backgroundfree CARS imaging and (2) label-free super-resolution Raman imaging, and carry out simple numerical simulations to show their feasibility. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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