Temperature coefficient of optical path of tellurite glasses doped with gold nanoparticles

This work reports on the thermo optical parameters of TeO2–PbO–GeO2 glasses as a function of the concentration of gold nanoparticles. Techniques such as thermal lens and heat capacity measurements allowed the determination of the thermal diffusivity D, thermal conductivity K and the temperature coefficient of optical path (ds/dT). It is shown an expressive decrease in ds/dT as a function of gold nanoparticles concentration, while the opposite effect was observed for the thermal diffusivity D.

► A convergent thermal lens effect was produced in Au doped tellurite glasses. ► The temperature coefficient of optical path (ds/dT) of Au doped tellurite glasses was measured. ► ds/dT decreased with the increase of concentration of Au nanoparticles in tellurite glasses. ► The thermal conductivity increased with the increase of Au nanoparticles concentration.