Strong Light–Matter Coupling in Carbon Nanotubes as a Route to Exciton Brightening
Shahnazaryan, V; Saroka, VA; Shelykh, IA; et al.Barnes, WL; Portnoi, ME
Date: 27 February 2019
Publisher
American Chemical Society
Publisher DOI
Abstract
We propose a scheme to maintain a robust radiative ground state in semiconductor single-walled carbon nanotubes. For that purpose, we employ a microcavity operating in the regime of strong coupling between the confined electromagnetic mode of the cavity and the excitonic resonance in an ensemble of carbon nanotubes. A high value of the ...
We propose a scheme to maintain a robust radiative ground state in semiconductor single-walled carbon nanotubes. For that purpose, we employ a microcavity operating in the regime of strong coupling between the confined electromagnetic mode of the cavity and the excitonic resonance in an ensemble of carbon nanotubes. A high value of the interband dipole matrix element in nanotubes makes the light-matter interaction extremely efficient and enables the achievement of the ultra-strong coupling regime. Radiative excitonic states become dressed by cavity photons and form polariton states which experience a huge vacuum Rabi splitting. The energy of the lower polariton moves downwards and can go beneath the energy of the dark exciton, and thus the ground state of the system becomes radiative. This leads to the radical enhancement of luminescence and opens new prospectives for potential optoelectronic applications of carbon-nanotube-based structures.
Physics and Astronomy
Faculty of Environment, Science and Economy
Item views 0
Full item downloads 0