Gold/vanadium dioxide bilayer for optical modulation upon laser short pulse excitation

The transition of vanadium oxide from an insulating phase to a metallic phase at a temperature of approximately 340 K is very interesting for a wide variety of photonic and optoelectronic applications. In this work, we study a gold/vanadium oxide bilayer, in which a pulsed laser source excites the metal. Using a three-temperature model of gold electrons, the gold lattice and the vanadium oxide lattice, we estimate the heating of the oxide that would induce its phase transition. The optical properties of the bilayer are studied using the transfer matrix method, highlighting the different light transmission with and without laser excitation.

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