By Peter Nordlander
Laboratory for Nanophotonics, Department of Physics and Astronomy, Rice University, Houston, USA
Plasmons can serve as efficient generators of hot electrons and holes that can be exploited in light harvesting applications. The physical mechanism for plasmon-induced hot carrier generation is plasmon decay. Plasmons can decay either radiatively or non-radiatively with a branching ratio that can be controlled by tuning the radiance of the plasmon mode. Non-radiative plasmon decay is a quantum mechanical process in which one plasmon quantum is transferred to the conduction electrons of the nanostructure by creating an electron-hole pair, i.e., excitation of an electron below the Fermi level of the metal into a state above the Fermi level but below the vacuum level. I will discuss the time-dependent relaxation of plasmon-induced hot carriers including electron-electron scattering, fluorescence, and electron-phonon coupling. I will also discuss recent applications of plasmon-induced hot carrier generation such as photocatalysis, and how photocatalytic efficiencies can be enhanced, quantified, and optimized by placing catalytic reactors in the nearfield of a plasmonic antenna in Antenna/Reactor geometries.
NOTICE: This is a double lecture together with Naomi J. Halas
There will be a reception right after this double lecture