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Coherence-modulated third harmonic generation for vibrational spectroscopy: a theoretical treatment |
JOSA B, Vol. 29, Issue 8, pp. 1875-1883 (2012)
http://dx.doi.org/10.1364/JOSAB.29.001875
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Abstract
An analytic model is developed to describe the influence of coherent vibrational motion on optical third harmonic generation. The vibrational coherence is prepared and probed by a pair of collinear optical pulses, focused at the interface of a crystal that has vibrational modes that are accessible to impulsive Raman scattering. Under these conditions, the probe pulse generates a third harmonic signal that is perturbed by the vibrational coherence through three mechanisms uncovered by this model: (1) coherent second hyper-Raman scattering, (2) cascaded amplitude modulation, and (3) perturbation of Fresnel transmission and reflection at the interface. Upon scanning the optical pulse delay and translating the crystal through the focal plane, these three contributions exhibit key differences, which may be observed experimentally.
© 2012 Optical Society of America
OCIS Codes
(020.1670) Atomic and molecular physics : Coherent optical effects
(020.4180) Atomic and molecular physics : Multiphoton processes
(190.2640) Nonlinear optics : Stimulated scattering, modulation, etc.
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
ToC Category:
Atomic and Molecular Physics
History
Original Manuscript: February 13, 2012
Revised Manuscript: June 1, 2012
Manuscript Accepted: June 1, 2012
Published: July 3, 2012
Citation
Jesse W. Wilson and Randy A. Bartels, "Coherence-modulated third harmonic generation for vibrational spectroscopy: a theoretical treatment," J. Opt. Soc. Am. B 29, 1875-1883 (2012)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-29-8-1875
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