Open AccessStrongly coupled exciton-surface plasmon polariton from excited-subband transitions of single-walled carbon nanotubes
Author(s) -
Weihang Zhou,
Xinhan Zhang,
Yingjun Zhang,
Tian Shu Cui,
Chi Xu
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.032142
Subject(s) - exciton , carbon nanotube , excited state , materials science , surface plasmon polariton , surface plasmon , polariton , plasmon , surface plasmon resonance , molecular physics , condensed matter physics , optics , optoelectronics , atomic physics , nanotechnology , nanoparticle , physics
We report experimental observation of strong coupling between surface plasmon polariton (SPP) propagating on a thin silver film and excitons from excited-subband transtitions of single-walled carbon nanotubes (SWNTs). Clear anti-crossing behaviors were observed from attenuated total reflection measurements when the SPP energy approaches the 2 nd subband transition of (6,5) SWNTs. The maximum Rabi splitting of the plasmon-exciton mixed states was extracted to be up to ~166.2 meV. Moreover, the splitting was found to be dependent linearly on the square root of the SWNTs concentration, in good agreement with theoretical prediction.