LAUSR

By virtue of the finite element method, the numerical simulations of the temperature field near a poly-layer spherical nanoparticle exposed to a pulsed optical radiation are carried out. Such particles model the double-shell nanocapsules with an aqueous core and composite light absorbing SiO2/TiO2 shells used in various biomedical and chemical applications. For the first time to our knowledge, we study in detail the spatial distribution of absorbed light power inside the double-shell nanocapsules as well as the heating dynamics by varying particle absorbance and laser irradiation time interval. We show that the maximal achievable temperature inside a nanocapsule could be increased by shortening the laser pulse and simultaneously tuning particle absorption, which determines the amplitude and spatial localization of the internal heat sources.