Ultraefficient Coupling of a Quantum Emitter to the Tunable Guided Plasmons of a Carbon Nanotube
Rights accessOpen Access
European Commisision's projectGRASP - GRAPHENE-BASED SINGLE-PHOTON NONLINEAR OPTICAL DEVICES (EC-FP7-613024)
PLASMONANOQUANTA - Frontiers in Plasmonics: Transformation Optics, Quantum and Non-linear phenomena (EC-FP7-290981)
GRAPHENE - Graphene-Based Revolutions in ICT And Beyond (EC-FP7-604391)
We show that a single quantum emitter can efficiently couple to the tunable plasmons of a highly doped single-wall carbon nanotube (SWCNT). Plasmons in these quasi-one-dimensional carbon structures exhibit deep subwavelength confinement that pushes the coupling efficiency close to 100% over a very broad spectral range. This phenomenon takes place for distances and tube diameters comprising the nanometer and micrometer scales. In particular, we find a β factor ≈1 for QEs placed 1–100 nm away from SWCNTs that are just a few nanometers in diameter, while the corresponding Purcell factor exceeds 106.