Boosting light absorption of a therapeutic microcapsule by means of auxiliary solid nanoparticles

Multilayer microparticles with a liquid core and polycomposite light-absorbing shell are important components of modern bio- medical technologies, in particular, serving as transport microcontainers the targeted delivery therapeutic nanodoses to desired region biological tissues. For reliably opening microcapsule by an optical radiation releasing payload, it is necessary dramatically increase light absorption such microcontainer. To this end, we propose surrounding specially added auxiliary nanoparticles, which can accumulate energy near its surface direct concentrated photonic flux target thus leading booster heating. Using numerical finite-difference time-domain (FDTD) calculations, simulate examine dynamics near-infrared spherical surrounded solid nanoparticles different properties (metal, biocompatible dielectric). We show that due scattering on field superlocalization ”hot regions” occurs. Up three-fold enhancement be achieved addition nanoparticles.