A consequence of thermal diffusion is that heat, even when applied to a  localized region of space, has the tendency to produce a temperature change that is  spatially uniform throughout a material.  The degree of spatial correlation between the heat power supplied and the temperature change that it induces is therefore likely to be small.  Yet, the ability to control heat flow and thus temperature at both nanoscale (&lt;100 nm) and micron-scale (~1-100 um) dimensions has important implications for applications ranging from big data to nanomedicine. In this talk, I will describe our theoretical efforts aimed at controlling thermal diffusion from 10s of nanometers to millimeters through the design and realization of a new class of thermal metamaterials composed of periodic lattices of diffractively-coupled plasmonic nanoparticles that both scatter and absorb incident light.  Specific emphasis will be placed on the impact of the emergent surface lattice resonance band structure upon the resulting thermal profiles spanning the lattice. Photothermal and super-resolution imaging techniques as indirect reporters of the multiscale spatial dependence of the temperature will be discussed.

Optical control over thermal distributions in plasmon lattices

Fall 2022 abstracts, posters, and presentations will launch in mid-September.

ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.