Near-unity quantum yield from carbon nanotube excitons coupled to plasmonic nanocavities
arXiv:1705.02034 · doi:10.1038/s41467-017-01777-w
Abstract
Single-walled carbon nanotubes (SWCNTs) are promising absorbers and emitters to enable novel photonic and optoelectronic applications but are also known to severely suffer from low optical quantum yields. Here we demonstrate SWCNTs excitons coupled to plasmonic nanocavities reaching deeply into the Purcell regime with FP=234 (average FP=76), near unity quantum yields of 70% (average 41%), and a photon emission rate of 1.7 MHz into the first lens. The measured ultra-narrow exciton linewidth (18 micro eV) implies furthermore generation of indistinguishable single photons from a SWCNT. To demonstrate utility beyond quantum light sources we show that nanocavity-coupled SWCNTs perform as single-molecule thermometers detecting plasmonically induced heat (Delta T=150K) in a unique interplay of excitons, phonons, and plasmons at the nanoscale.
arXiv comment17 pages, 5 figures
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- Luminescent Defects in Single-Walled Carbon Nanotubes for Applications
- Enhanced single photon emission from carbon nanotube dopant states coupled to silicon microcavities
- Deterministic coupling of quantum emitters in WSe monolayers to plasmonic nanocavities
- The Nanoplasmonic Purcell Effect in Ultrafast and High-Light-Yield Perovskite Scintillators
- Strong Light-Matter Coupling in Carbon Nanotubes as a Route to Exciton Brightening
- Interband transitions in narrow-gap carbon nanotubes and graphene nanoribbons
- High efficiency dark-to-bright exciton conversion in carbon nanotubes
- Near-unity radiative quantum efficiency of excitons in carbon nanotubes
- Effect of phonon bath dimensionality on the spectral efficiency of single-photon emitters in the Purcell regime
- Giant Purcell broadening and Lamb shift for DNA-assembled near-infrared quantum emitters
- Propagation and excitation properties of nonlinear surface plasmon polaritons in a rectangular barrier