Exploiting one-dimensional exciton-phonon coupling for tunable and efficient single-photon generation with a carbon nanotube

Abstract

Condensed-matter emitters offer enriched cavity quantum electrodynamical effects due to the coupling to external degrees of freedom. In the case of carbon nanotubes a very peculiar coupling between localized excitons and the one-dimensional acoustic phonon modes can be achieved, which gives rise to pronounced phonon wings in the luminescence spectrum. By coupling an individual nanotube to a tunable optical micro-cavity, we show that this peculiar exciton-phonon coupling is a valuable resource to enlarge the tuning range of the single-photon source while keeping an excellent exciton-photon coupling efficiency and spectral purity. Using the unique flexibility of our scanning fiber cavity, we are able to measure the efficiency spectrum of the very same nanotube in the Purcell regime for several mode volumes. Whereas this efficiency spectrum looks very much like the free-space luminescence spectrum when the Purcell factor is small (large mode volume), we show that the deformation of this spectrum at lower mode volumes can be traced back to the strength of the exciton-photon coupling. It shows an enhanced efficiency on the red wing that arises from the asymmetry of the incoherent energy exchange processes between the exciton and the cavity. This allows us to obtain a tuning range up to several hundred times the spectral width of the source.

References in corpus (11)

• Resonant enhancement of the zero-phonon emission from a color center in a diamond cavity
• Fiber Fabry-Perot cavity with high finesse
• Quantum Dot Cavity-QED in the Presence of Strong Electron-Phonon Interactions
• Controlling the dynamics of a coupled atom-cavity system by pure dephasing : basics and potential applications in nanophotonics
• Ultralow mode-volume photonic crystal nanobeam cavities for high efficiency coupling to individual carbon nanotube emitters
• Pure emitter dephasing : a resource for advanced solid-state single photon sources
• Widely tunable single-photon source from a carbon nanotube in the Purcell regime
• Cavity-funneled generation of indistinguishable single photons from strongly dissipative quantum emitters
• Non-Markovian decoherence of localized nanotube excitons by acoustic phonons
• Unifying the low-temperature photoluminescence spectra of carbon nanotubes: the role of acoustic phonon confinement
• Strong reduction of exciton-phonon coupling in high crystalline quality single-wall carbon nanotubes: a new insight into broadening mechanisms and exciton localization

Cited by in corpus (8)

• Near-unity quantum yield from carbon nanotube excitons coupled to plasmonic nanocavities
• Luminescent Defects in Single-Walled Carbon Nanotubes for Applications
• Achievements and Perspectives of Optical Fiber Fabry-Perot Cavities
• Strong Light-Matter Coupling in Carbon Nanotubes as a Route to Exciton Brightening
• Interband transitions in narrow-gap carbon nanotubes and graphene nanoribbons
• A telecom band single-photon source using a grafted carbon nanotube coupled to a fiber Fabry-Perot cavity in the Purcell regime
• Effect of phonon bath dimensionality on the spectral efficiency of single-photon emitters in the Purcell regime
• Controlling dephasing of coupled qubits via shared-bath coherence