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

Full Article  |  PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (6)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription