Intensity, wavelength, and polarization dependence of nonphotochemical laser-induced nucleation in supersaturated aqueous urea solutions

Jelena Matic, Xiaoying Sun, Bruce Garetz, Allan S. Myerson

Research output: Contribution to journalArticle

Abstract

We have measured the intensity dependence of nonphotochemical laser-induced nucleation (NPLIN) in 11.9 M aqueous urea solutions at 532 and 1064 nm, using both linearly and circularly polarized light. In all cases, we observed a nonlinear intensity dependence of the nucleation efficiency with thresholds of approximately 0.02-0.06 GW/cm2. The threshold at the green wavelength is lower than the threshold at the near-infrared wavelength. Moreover, the green nucleation efficiency is greater than the near-infrared efficiency at the same intensity. We attribute these differences to the greater absorption coefficient of water at 1064 nm compared to that at 532 nm. At both 532 and 1064 nm, the threshold for NPLIN is lower, and the efficiency of NPLIN at a given intensity is higher for linear polarization than for circular polarization. These differences are consistent with an optical Kerr effect mechanism for NPLIN.

Original languageEnglish (US)
Pages (from-to)1565-1567
Number of pages3
JournalCrystal Growth and Design
Volume5
Issue number4
DOIs
StatePublished - Jul 2005

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ureas
Urea
Nucleation
nucleation
Polarization
Wavelength
Lasers
polarization
wavelengths
lasers
thresholds
Optical Kerr effect
Infrared radiation
Circular polarization
Light polarization
circular polarization
Kerr effects
linear polarization
polarized light
absorptivity

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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Intensity, wavelength, and polarization dependence of nonphotochemical laser-induced nucleation in supersaturated aqueous urea solutions. / Matic, Jelena; Sun, Xiaoying; Garetz, Bruce; Myerson, Allan S.

In: Crystal Growth and Design, Vol. 5, No. 4, 07.2005, p. 1565-1567.

Research output: Contribution to journalArticle

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