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arXiv · 1502.02488

Ultra-Efficient Coupling of a Quantum Emitter to the Tunable Guided Plasmons of a Carbon Nanotube

Luis Martin-Moreno·F. Javier Garcia de Abajo·Francisco J. Garcia-Vidal
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Abstract

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 beta 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 10^6. Our finding not only holds great potential for waveguide QED, in which an efficient interaction between emitters and cavity modes is pivotal, but it also provides a way of realizing quantum strong coupling between several emitters mediated by SWCNT plasmons, which can be controlled through the large electro-optical tunability of these excitations.

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Luis Martin-Moreno, F. Javier Garcia de Abajo, Francisco J. Garcia-Vidal. 2015-02-09. Ultra-Efficient Coupling of a Quantum Emitter to the Tunable Guided Plasmons of a Carbon Nanotube. https://doi.org/10.1103/physrevlett.115.173601

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