BROWSE

Related Scientist

Researcher

분자 분광학 및 동력학 연구단
분자 분광학 및 동력학 연구단
more info

Spectral modulation of stimulated Raman scattering signal: Beyond weak Raman pump limit

Cited 1 time in webofscience Cited 0 time in scopus
122 Viewed 55 Downloaded
Title
Spectral modulation of stimulated Raman scattering signal: Beyond weak Raman pump limit
Author(s)
Sohee Lim; Bonghwan Chon; Hanju Rhee; Minhaeng Cho
Publication Date
2018-04
Journal
JOURNAL OF RAMAN SPECTROSCOPY, v.49, no.4, pp.607 - 620
Abstract
Stimulated Raman scattering has recently been used in label‐free vibrational imaging studies of live cells. Important attempts to develop super‐resolution Raman imaging with intense Raman pump or decoherence beam have been made. However, the intense beams beyond weak stimulated Raman scattering limit could complicate spectral characteristics of Raman gain or loss signals. Here, the dependences of stimulated Raman loss signal on Raman pump intensity and pump‐probe delay time (Δt) are specifically investigated through both experimental and simulation studies. In the strong pump regime, a pronounced spectral modulation in stimulated Raman loss is observed at the Raman peaks of aromatic compounds with relatively large optical Kerr non‐linearity. We perform a numerical simulation for the coupled wave propagation to investigate the effect of cross‐phase modulation (XPM) on the stimulated Raman scattering (SRS). Our simulation involving both vibrationally resonant SRS and non‐resonant XPM effects in part accounts for the Δt‐dependent peak shift and spectral broadening as well as the appearance of a gain signal at negative time delays (Δt < 0). At the high pump intensity, it is found that the anti‐symmetric XPM signal with respect to the time zero (Δt = 0) cannot be selectively eliminated to produce pure SRS signal by time‐integration over Δt because of the increased interference term of the SRS and XPM at the Raman‐active frequency region. We believe that the experimental and simulation results discussed here would be of use in developing a super‐resolution coherent Raman imaging microscope in the near future. © 2018 John Wiley & Sons, Ltd
URI
https://pr.ibs.re.kr/handle/8788114/4588
ISSN
0377-0486
Appears in Collections:
Center for Molecular Spectroscopy and Dynamics(분자 분광학 및 동력학 연구단) > Journal Papers (저널논문)
Files in This Item:
Spectral modulation of stimulated Raman scattering signal_임소희(조민행).pdfDownload

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse