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  • Vol. 18, Iss. 5 — Mar. 1, 1993
  • pp: 340–342

Suppression of stimulated Raman scattering from microdroplets by seeding with nanometer-sized latex particles

J.-G. Xie, T. E. Ruekgauer, R. L. Armstrong, and R. G. Pinnick  »View Author Affiliations


Optics Letters, Vol. 18, Issue 5, pp. 340-342 (1993)
http://dx.doi.org/10.1364/OL.18.000340


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Abstract

Stimulated Raman scattering (SRS) in laser-irradiated microdroplets is suppressed by the addition of nanometer-sized latex particles. The microdroplets consist of either pure ethanol or a solution of Rhodamine 6G dye in ethanol, seeded with latex particles having diameters of 50 < d < 500 nm. SRS emission occurs at droplet morphology-dependent resonances (MDR’s) after either direct pumping by the incident 532-nm laser or indirectly whereby the pump laser first initiates dye lasing, which in turn pumps SRS. For large latex, we observe SRS suppression at a near-coincident threshold concentration independent of the presence of dye, whereas, for small latex, adding dye reduces the threshold concentration by more than an order of magnitude. These findings are consistent with the interpretation that for large latex ~1 particle must occupy the MDR mode volume at threshold, whereas for small latex the addition of particles facilitates Förster-assisted annihilation of both 532-nm and dye-lasing MDR pump photons.

© 1993 Optical Society of America

History
Original Manuscript: November 9, 1992
Published: March 1, 1993

Citation
J.-G. Xie, R. G. Pinnick, T. E. Ruekgauer, and R. L. Armstrong, "Suppression of stimulated Raman scattering from microdroplets by seeding with nanometer-sized latex particles," Opt. Lett. 18, 340-342 (1993)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-18-5-340


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