Optical and magnetic-resonance spectoscopy of single molecules

J. Schmidt

doi:10.1117/12.511784

11 June 2003 Optical and magnetic-resonance spectroscopy of single molecules

J. Schmidt

Proceedings Volume 5023, 10th International Symposium on Nanostructures: Physics and Technology; (2003) https://doi.org/10.1117/12.511784
Event: 2003 Chapter books, 2003, Bellingham, WA, United States

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.

Citation Download Citation

J. Schmidt "Optical and magnetic-resonance spectroscopy of single molecules", Proc. SPIE 5023, 10th International Symposium on Nanostructures: Physics and Technology, (11 June 2003); https://doi.org/10.1117/12.511784

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