Asymptotic exchange coupling of quasi-1D excitons in carbon nanotubes

Details Asymptotic exchange coupling of quasi-1D excitons in carbon nanotubes Asymptotic exchange coupling of quasi-1D excitons in carbon nanotubes

2010-10-28

arxiv.org/abs/1010.6035v2

Phys. Rev. B 83, 153409 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures. Text and figures updated. References added

Scientific paper

An analytical expression is obtained for the biexciton binding energy as a function of the inter-exciton distance and binding energy of constituent quasi-one-dimensional excitons in carbon nanotubes. This allows one to trace biexciton energy variation and relevant non-linear absorption under external conditions whereby the exciton binding energy varies. The non-linear absorption lineshapes calculated exhibit characteristic asymmetric (Rabi) splitting as the exciton energy is tuned to the nearest interband plasmon resonance. These results are useful for tunable optoelectronic device applications of optically excited semiconducting carbon nanotubes, including the strong excitation regime with optical non-linearities.

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