Nonlinear Mechanooptical Transmittance Controlled by a Rotating TiO2 Thin Solid Film with Embedded Bimetallic Au-Pt Nanoparticles

Abstract EN

The modification in the third-order nonlinear optical behavior exhibited by a titanium dioxide thin solid film with embedded Gold-Platinum nanoparticles was induced by nanosecond optical pulses.

A Nd:YAG laser system was employed for the experiments explored by a vectorial two-wave mixing method with the sample in rotation.

The nanostructures were prepared by a sol-gel technique.

Transmission Electron Microscopy studies and ultraviolet-optical spectroscopy measurements were undertaken.

The evolution of the optical transmittance exhibited by the sample in rotation controlled by a servomechanism was observed.

Potential applications for developing mechanooptical functions based on third-order optical nonlinearities were contemplated.