Low Frequency Collinear Pre-Resonant Impulsive Stimulated Raman Microspectroscopy

Yahel Soffer, Dekel Raanan, Dan Oron

Research output: Contribution to journalArticlepeer-review

Abstract

In this work, we extend low frequency impulsive stimulated Raman microspectroscopy to the pre-electronic resonance regime, using a broadband two-color collinear pump probe scheme which can be readily extended to imaging. We discuss the difficulties unique to this type of measurements in the form of competing resonant two-photon absorption processes and the means to overcome them, and successfully reduce the noise which arises due to those competing processes by eliminating the detected spectral components which do not contribute to the vibrational signature of the sample yet introduce most of the noise. Finally, we demonstrate low frequency spectroscopy of crystalline samples under near-resonant pumping showing both enhancement and spectral modification due to coupling with the electronic degree of freedom.

Original languageEnglish
Pages (from-to)3481-3488
Number of pages8
JournalACS Photonics
Volume7
Issue number12
DOIs
Publication statusPublished - Dec 16 2020

Keywords

  • Impulsive Raman spectroscopy
  • Vibrational microspectroscopy
  • Vibronic coupling

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

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