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Volume 184, 2015
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Single-molecule spectromicroscopy: a route towards sub-wavelength refractometry

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Abstract

We suggest a novel approach for spatially resolved probing of local fluctuations of the refractive index n in solids by means of single-molecule (SM) spectroscopy. It is based on the dependence T1(n) of the effective radiative lifetime T1 of dye centres in solids on n due to the local-field effects. Detection of SM zero-phonon lines at low temperatures gives the values of the SM natural spectral linewidth (which is inversely proportional to T1) and makes it possible to reveal the distribution of the local n values in solids. Here we demonstrate this possibility on the example of amorphous polyethylene and polycrystalline naphthalene doped with terrylene. In particular, we show that the obtained distributions of lifetime limited spectral linewidths of terrylene molecules embedded into these matrices are due to the spatial fluctuations of the refractive index local values.

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Publication details

The article was received on 20 May 2015, accepted on 10 Jul 2015 and first published on 10 Jul 2015


Article type: Paper
DOI: 10.1039/C5FD00086F
Author version available: Download Author version (PDF)
Citation: Faraday Discuss., 2015,184, 263-274
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    Single-molecule spectromicroscopy: a route towards sub-wavelength refractometry

    T. A. Anikushina, M. G. Gladush, A. A. Gorshelev and A. V. Naumov, Faraday Discuss., 2015, 184, 263
    DOI: 10.1039/C5FD00086F

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