Plasmon-Induced Hot Carrier Generation and Applications

From 10/10/2018

“Plasmon-Induced Hot Carrier Generation and Applications” By Professor Peter Nordlander, Laboratory for Nanophotonics, Department of Physics and Astronomy, Rice University, Houston, USA

Abstract on this lecture

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.

Peter Nordlander discuss the time-dependent relaxation of plasmon-induced hot carriers including electron-electron scattering, fluorescence, and electron-phonon coupling.

Peter Nordlander did 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.

This was a double lecture together with Naomi J. Halas