Analysis of Photothermal Effect of Nanoparticles and Phase Transition of Matrix Media

Nanoparticles with different shapes and materials have been widely applied in the field of solar energy collection and storage, photothermal therapy, nanochemistry, and optofluidics. In the above mentioned applications, the precise control of light absorption and temperature distribution in nanoscale is very important. Therefore, in the present work, we studied the phase transition and temperature distribution around plasmonic nanoparticle dimers under the illumination of laser. The optical properties of gold nanocube and nanocuboid were obtained. The dependence of absorption efficiency of nanodimers on the interparticle distance is investigated. On this basis, we studied the influence of polarizing angle of incident light on the heat source and temperature distribution of nanocuboid dimers in different arrangement. The results show that the nanoscale temperature distribution and phase transition can be manipulated precisely by adjusting the polarizing angle of incident light.