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  • Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies
  • OSA Technical Digest (CD) (Optica Publishing Group, 2008),
  • paper QTuD4

Strongly Coupled Surface Plasmon-Exciton Excitations in Small-Diameter Carbon Nanotubes

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Abstract

We study theoretically the interactions of excitonic states with surface electromagnetic modes of a single-walled carbon nanotube. We show that these interactions result in the exciton-plasmon coupling that is significant in its strength due to the presence of weakly-dispersive low-energy (~0.5–2 eV) interband surface plasmon modes and large exciton excitation energies ~1 eV in small-diameter nanotubes. We estimate the exciton-plasmon Rabi splitting to be ~0.1 eV which is close to that in organic semiconductors and much larger than that in hybrid semiconductor-metal nanoparticle molecules. We calculate the exciton absorption lineshape and show the line splitting effect as the exciton is tuned to the nearest interband surface plasmon resonance of the nanotube.

© 2008 Optical Society of America

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