Evidence of Hybrid Excitons in Weakly Interacting
Nanopeapods
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Abstract
Nanopeapods, consisting of optically
active π-conjugated
molecules encapsulated inside of the cavity of carbon nanotubes, exhibit
efficient photon emission in the visible spectral range. Combining
optical experiments with ab initio theory, we show that the puzzling
features observed in photoluminescence spectra are of excitonic nature.
The subunits though being van der Waals bound are demonstrated to
interact in the excited state, giving rise to the formation of hybrid
excitons. We rationalize why this many-body effect makes such nanohybrids
useful for optoelectronic devices