Vibrational spectroscopy via stimulated Raman induced Kerr lensing

Dekel Raanan, Julian Lüttig, Yaron Silberberg, Dan Oron

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We present a new method for the measurement of the stimulated Raman spectrum based on time-dependent spatial modulation of a laser beam as it passes through a Raman active medium. This effect is similar to the instantaneous Kerr lensing and Kerr deflection yet involves resonant vibrations which result in a time-dependent refractive index change. We use sub-nanojoule pulses together with a sensitive pump-probe measurement apparatus to excite and detect the fine (10-5-10-4) temporal and spatial variations in intensity resulting from the Raman-induced Kerr effect. We demonstrate the effect by changing the spatial overlap between the pump and probe at the sample and measuring the time-dependent deformation of the probe beam's cross section. This method is particularly useful for detection of low-frequency Raman lines, as we demonstrate by measuring the Raman spectrum of neat liquids in a cuvette.

Original languageEnglish
Article number092501
JournalAPL Photonics
Volume3
Issue number9
DOIs
Publication statusPublished - Jan 1 2018

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Vibrational spectroscopy
Raman scattering
Pumps
spectroscopy
probes
Raman spectra
pumps
resonant vibration
Laser beams
Refractive index
Kerr effects
Modulation
deflection
Liquids
laser beams
refractivity
low frequencies
modulation
cross sections
liquids

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Atomic and Molecular Physics, and Optics

Cite this

Vibrational spectroscopy via stimulated Raman induced Kerr lensing. / Raanan, Dekel; Lüttig, Julian; Silberberg, Yaron; Oron, Dan.

In: APL Photonics, Vol. 3, No. 9, 092501, 01.01.2018.

Research output: Contribution to journalArticle

Raanan, Dekel ; Lüttig, Julian ; Silberberg, Yaron ; Oron, Dan. / Vibrational spectroscopy via stimulated Raman induced Kerr lensing. In: APL Photonics. 2018 ; Vol. 3, No. 9.
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