Fluorescence quenching in graphene: a fundamental ruler and evidence for transverse plasmons

Details Fluorescence quenching in graphene: a fundamental ruler and evidence for transverse plasmons Fluorescence quenching in graphene: a fundamental ruler and evidence for transverse plasmons

2011-08-04

arxiv.org/abs/1108.1160v2

Phys. Rev. B 84, 165438 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 2 figures

Scientific paper

10.1103/PhysRevB.84.165438

Graphene's fluorescence quenching is studied as a function of distance. Transverse decay channels, full retardation and graphene-field coupling to all orders are included, extending previous instantaneous results. For neutral graphene, a virtually exact analytical expression for the fluorescence yield is derived, valid for arbitrary distances and only based on the fine structure constant $\alpha$, the fluorescent wavelength $\lambda$, and distance $z$. Thus graphene's fluorescence quenching measurements provide a fundamental distance ruler. For doped graphene and at appropriate energies, the fluorescence yield at large distances is dominated by transverse plasmons, providing a platform for their detection.

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