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Proceedings Paper

Optical and magnetic-resonance spectoscopy of single molecules
Author(s): J. Schmidt
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Paper Abstract

In this contribution a short review is given of spectroscopic experiments on single molecules embedded in solid host materials at low temperatures. First it is shown how an individual pentacene molecule can be selected optically and how the magnetic-resonance transitions of its metastable triplet state can be observed. In addition it is shown that the magnetic-resonance transitions of a single nuclear spin, connected via hyperfine interactions to the single triplet spin can be observed. Single-molecule techniques can be applied with success to biologically relevant systems as is demonstrated by the first observation of the fluorescence-excitation spectra of individual light-harvesting complexes of photosynthetic bacteria. These results demonstrate unambiguously that the excited states of this complex must be described as Frenkel excitons, i.e., as excitations that are delocalized over the pigment molecules present in the complex.

Paper Details

Date Published: 11 June 2003
PDF: 7 pages
Proc. SPIE 5023, 10th International Symposium on Nanostructures: Physics and Technology, (11 June 2003); doi: 10.1117/12.511784
Show Author Affiliations
J. Schmidt, Univ. of Leiden (Netherlands)

Published in SPIE Proceedings Vol. 5023:
10th International Symposium on Nanostructures: Physics and Technology
Zhores I. Alferov; Leo Esaki, Editor(s)

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