Fluorescence Intermittency of A Single Quantum System and Anderson Localization
Abstract
The nature of fluorescence intermittency for semiconductor quantum dots (QD) and single molecules (SM) is proposed as a manifestation of Anderson localization. The power law like distribution for the \emph{on} time is explained as due to the interaction between QD/SM with a random environment. In particular, we find that the \emph{on}-time probability distribution behaves differently in localized and delocalized regimes. They, when properly scaled, are \emph{universal} for different QD/SM systems. The \emph{on}-time probability distribution function in the delocalized QD/SM regime can be approximated by power laws with exponents covering . QD/SM switches to a dark (\emph{off}) state when a charge of QD/SM hops into the trap states, which becomes localized after stabilization by the surrounding matrix.
Cite
@article{arxiv.cond-mat/0601092,
title = {Fluorescence Intermittency of A Single Quantum System and Anderson Localization},
author = {Xiang Xia and Robert J. Silbey},
journal= {arXiv preprint arXiv:cond-mat/0601092},
year = {2007}
}
Comments
5 pages, 3 figures