Journal
NANO LETTERS
Volume 13, Issue 5, Pages 2030-2035Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl400176b
Keywords
Graphene; strong light-matter interaction; nano-optics; energy transfer; molecules
Categories
Funding
- Fundacicio Cellex Barcelona
- ERC [307806, 294056]
- Spanish MICINN [MAT2010-14885]
- Spanish MICINN (Consolider Nano-Light.es)
- European Commission [FP7-ICT-2009-4-248909-LIMA, FP7-ICT-2009-4-248855-N4E]
- Marie-Curie International Fellowship COFUND
- ICFOnest program
- NWO Rubicon grant
- Leonardo da Vinci subsidy
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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 two-dimensional lossy media. The emitter decay rate is enhanced 90 times (energy transfer efficiency of similar to 99%) with respect to the decay in vacuum at distances d approximate to 15 nm. This high energy transfer rate is mainly due to the two-dimensionality and gapless character of the monatomic carbon layer. Graphene is thus shown to be an extraordinary energy sink, holding great potential for photodetection, energy harvesting, and nanophotonics.
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