High efficient plasmonic nano heaters

Abstract

Thanks to an optimized nanostructures arrangement, we report on temperature variation of $250^{\circ} \mathrm{C}$ by impinging a plasmonic device with a green laser radiation. This great temperature value is caused by the strong confinement of electric field that is due to the covering gold nano heaters with a layer of polymer + dye. A chopper-modulated impinging wave adds a new control mechanism of the thermal response. In this configuration, the proposed device reveals a maximum temperature variation of $60^{\circ} \mathrm{C}$ in a period (1Hz frequency). This photo-thermal behaviour can be useful for the development of breakthrough devices in emerging fields of precision medicine and nano reactor where the control of local heating is of paramount importance.