Background: Studies about fascinating nonlinear optical effects are a promise to the development
of high-sensitive instruments and ultrafast all-optical systems. Particularly, the optical
Kerr effect exhibited by bimetallic nanoparticles can be employed to determine vibrations and the
vectorial nature of mechanical actions in low-dimensional materials. With this motivation, this work
has been devoted to analyze third-order nonlinear optical effects influenced by acousto-optical processes
interacting with bimetallic nanoparticles.
Methods: A nanosecond two-wave mixing experiment was employed to explore the nonlinear optical
response exhibited by Gold-Platinum nanoparticles embedded in a Titanium dioxide thin solid film
under acoustical perturbations.
Results: Significant contributions from acoustical signals to third-order nonlinear optical effects in
bimetallic Au-Pt nanoparticles were demonstrated. Vectorial two-wave mixing laser experiments were
described by the participation of an optically induced birefringence and an acoustically induced effect
responsible for a nonlinear refractive index. It was pointed out the possibility to identify acoustical
signals and transduction of quantum mechanical information by interferometry and multi-wave mixing
experiments. It was highlighted the attractive results with potential applications for designing nonlinear
Conclusion: The incorporation of Au-Pt nanoparticles in transparent dielectric platforms seems to remarkably
enhance the sensibility for measuring acousto-optical signals. It was contemplated that
acousto-optical modulation assisted by third-order nonlinear optical effects may be useful for quantum
information transduction processes. A low-dimensional OR logic gate system dependent on acoustical
interactions and optical Kerr effect signals can be proposed. The large nonlinear optical response together
to the double resonances associated to bimetallic nanoparticles makes them useful for potential
applications related to ultrafast all-optical systems and digital logic gates.