Abstract
Plasmon-generated hot carriers are currently being studied intensively for their role in enhancing the efficiency of photovoltaic and photocatalytic processes. Theoretical studies of the hot electrons subsystem have generated insight, but we show that a unified quantum-mechanical treatment of the plasmon and hot electrons reveals new physical phenomena. Instead of a unidirectional energy transfer process in Landau damping, back energy transfer is predicted in small metal nanoparticles (MNPs) within a model-Hamiltonian approach. As a result, the single Lorentzian plasmonic line shape is modulated by a multipeak structure, whose individual line width provides a direct way to probe the electronic dephasing. More importantly, the hot electron generation can be enhanced greatly by matching the incident energy to the peaks of the modulated line shape.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 141-145 |
| Number of pages | 5 |
| Journal | Journal of Physical Chemistry Letters |
| Volume | 9 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 4 2018 |
Funding
The authors thank the Atomic, Molecular, and Optics Sciences (AMOS) of the Department of Energy (Award Number DE-FG02-04ER15612/0013) and the National Science Foundation (Award Number CHE-1465201) for support.
ASJC Scopus subject areas
- General Materials Science
- Physical and Theoretical Chemistry
