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\bibitem{Cambre_etal2015} {\textquotedblleft}\textit{Asymmetric dyes align inside carbon nanotubes to yield a large nonlinear optical response}{\textquotedblright}. Cambr{\'e} S, Campo J, Beirnaert C, Verlackt C, Cool P, Wenseleers W, Nature nanotechnology \textbf{10}, 248 (2015).   http://doi.org/10.1038/nnano.2015.1

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