4.6 Article

Nonlinear optical response of colloidal suspensions

Journal

OPTICS EXPRESS
Volume 17, Issue 12, Pages 10277-10289

Publisher

OPTICAL SOC AMER
DOI: 10.1364/OE.17.010277

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Funding

  1. UK Engineering and Physical Sciences Research Council
  2. Joint Services Optical Program (JSOP)
  3. Engineering and Physical Sciences Research Council [EP/F025602/1] Funding Source: researchfish
  4. EPSRC [EP/F025602/1] Funding Source: UKRI

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We experimentally probed the nonlinear optical response of aqueous nano-colloidal suspensions to provide a test of the theoretical approaches that have been proposed for the nonlinearity, namely an exponential model, an artificial Kerr medium, and a non-ideal gas model. The best agreement with experiment is found using the non-ideal gas model for the colloidal suspension which in turn can be used to infer values for the second virial coefficient of the medium and the nonlinear coefficients. (c) 2009 Optical Society of America

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