Strong exciton-plasmon coupling in semiconducting carbon nanotubes

Abstract

We study theoretically the interactions of excitonic states with surface electromagnetic modes of small-diameter (~1 nm) semiconducting single-walled carbon nanotubes. We show that these interactions can result in strong exciton-surface-plasmon coupling. The exciton absorption line shape exhibits Rabi splitting ~0.1 eV as the exciton energy is tuned to the nearest interband surface plasmon resonance of the nanotube. We also show that the quantum confined Stark effect may be used as a tool to control the exciton binding energy and the nanotube band gap in carbon nanotubes in order, e.g., to bring the exciton total energy in resonance with the nearest interband plasmon mode. The exciton-plasmon Rabi splitting we predict here for an individual carbon nanotube is close in its magnitude to that previously reported for hybrid plasmonic nanostructures artificially fabricated of organic semiconductors on metallic films. We expect this effect to open up paths to new tunable optoelectronic device applications of semiconducting carbon nanotubes.

22 pages, 8 figures, accepted for PRB

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• Generalized Theory of Forster-type Nonradiative Energy Transfer in Nanostructures with Mixed Dimensionality
• Dissipative dynamics of a solid-state qubit coupled to surface plasmons: from non-Markov to Markov regimes
• Redshift of excitons in carbon nanotubes caused by the environment polarizability
• Intrinsically ultrastrong plasmon-exciton interactions in crystallized films of carbon nanotubes
• Single wall carbon nanotubes as coherent plasmon generators
• Asymptotic exchange coupling of quasi-1D excitons in carbon nanotubes
• Coherent charge transport through molecular wires: "Exciton blocking" and current from electronic excitations in the wire
• Collective Excitations and Optical Response of Ultrathin Carbon Nanotube Films
• Possibility for exciton Bose-Einstein condensation in carbon nanotubes
• Relative stability of excitonic complexes in quasi-one-dimensional semiconductors
• Finite-thickness effects in plasmonic films with periodic cylindrical anisotropy
• Tunable electronic correlation effects in nanotube-light interactions
• Controlled Exciton-Plasmon Coupling in a Mixture of Ultrathin Periodically Aligned Single-Wall Carbon Nanotube Arrays
• Plasmon enhanced Raman scattering effect for an atom near a carbon nanotube
• One-dimensional transport in hybrid metal-semiconductor nanotube systems
• Quantum symmetry breaking of exciton/polaritons in metal-nanorod plasmonic array
• Anisotropic Photon Emission Enhancement near Carbon Nanotube Metasurfaces
• Tunable Hyperbolic Metamaterials Based on Self-Assembled Carbon Nanotubes