Universal Distance-Scaling of Non-radiative Energy Transfer to GrapheneReportar como inadecuado



 Universal Distance-Scaling of Non-radiative Energy Transfer to Graphene


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The near-field interaction between fluorescent emitters and graphene exhibits rich physics associated with local dipole-induced electromagnetic fields that are strongly enhanced due to the unique properties of graphene. Here, we measure emitter lifetimes as a function of emitter-graphene distance d, and find agreement with a universal scaling law, governed by the fine-structure constant. The observed energy transfer- rate is in agreement with a 1-d^4 dependence that is characteristic of 2D lossy media. The emitter decay rate is enhanced 90 times transfer efficiency of ~99% with respect to the decay in vacuum at distances d ~ 5 nm. This high energy-transfer rate is mainly due to the two-dimensionality and gapless character of the monoatomic carbon layer. Graphene is thus shown to be an extraordinary energy sink, holding great potential for photodetection, energy harvesting, and nanophotonics.



Autor: L. Gaudreau; K. J. Tielrooij; G. E. D. K. Prawiroatmodjo; J. Osmond; F. J. Garcia de Abajo; F. H. L. Koppens

Fuente: https://archive.org/







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