Photoabsorption by Volume Plasmons in Metal Nanoclusters
Atomic and Molecular Clusters
2009-04-21 v1 Mesoscale and Nanoscale Physics
Abstract
It is well known that plasmons in bulk metals cannot be excited by direct photoabsorption, that is, by coupling of volume plasmons to light. Here we demonstrate that the situation in nanoclusters of the same metals is entirely different. We have carried out a photodepletion measurement for Na_20 and Na_92 and identified a broad volume plasmon absorption peak centered slightly above 4 eV, revealing the possibility of optical excitation of volume-type collective electronic modes in a metallic system. The observed phenomenon is related to different selection rules for finite systems.
Keywords
Cite
@article{arxiv.0904.2948,
title = {Photoabsorption by Volume Plasmons in Metal Nanoclusters},
author = {Chunlei Xia and Chunrong Yin and Vitaly V. Kresin},
journal= {arXiv preprint arXiv:0904.2948},
year = {2009}
}