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Optics Letters

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  • Editor: Xi-Cheng Zhang
  • Vol. 39, Iss. 12 — Jun. 15, 2014
  • pp: 3406–3409

Measurement of thermal diffusivities of silver nanoparticle colloidal suspensions by means of a frequency-resolved thermal lensing approach

Luis Rodriguez, Jaime F. Cárdenas-García, and César Costa Vera  »View Author Affiliations


Optics Letters, Vol. 39, Issue 12, pp. 3406-3409 (2014)
http://dx.doi.org/10.1364/OL.39.003406


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Abstract

A frequency-resolved thermal lensing (TL) approach to measure thermal diffusivity properties of both diluted liquid solutions and silver nanoparticle colloidal suspensions is demonstrated. The experiment is based on a classical two-color pump–probe TL configuration, which is adapted to measure the induced TL signal as a function of the chopping frequency of the pump beam. Because of the thermal diffusivity lengths in the samples, the TL signal decreases exponentially with the increment of the frequency. The exponential decay factor can be associated with the thermal diffusivity of the medium. Measurements are performed on diluted liquid solutions and silver nanoparticles suspended in a PVP solution. A suitable fitting to a theoretical model based on the Fresnel diffraction approximation of the experimental data is obtained. This work demonstrates the feasibility of using this approach for the thermal characterization of nanoparticles in liquid solutions. Thermal diffusivity as low as 0.094×107m2s1 can be estimated by using this approach.

© 2014 Optical Society of America

OCIS Codes
(000.2170) General : Equipment and techniques
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(140.6810) Lasers and laser optics : Thermal effects
(190.4870) Nonlinear optics : Photothermal effects
(300.6430) Spectroscopy : Spectroscopy, photothermal
(350.6830) Other areas of optics : Thermal lensing

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: April 17, 2014
Revised Manuscript: May 2, 2014
Manuscript Accepted: May 3, 2014
Published: June 4, 2014

Citation
Luis Rodriguez, Jaime F. Cárdenas-García, and César Costa Vera, "Measurement of thermal diffusivities of silver nanoparticle colloidal suspensions by means of a frequency-resolved thermal lensing approach," Opt. Lett. 39, 3406-3409 (2014)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-39-12-3406

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