Wednesday, April 15, 2015

Chirality-Selective Optical Scattering Force on Single-Walled Carbon Nanotubes

Susan E. Skelton Spesyvtseva, Satoru Shoji, and Satoshi Kawata

We show that optical forces acting on carbon nanotubes are substantially enhanced when the optical wavelength is tuned to resonances in the electronic band structure. Using a tunable laser source, we experimentally demonstrate a resonant optical scattering force on single-walled carbon nanotubes and, by tuning the wavelength, exploit this force to achieve chirality enrichment of four chiralities of nanotubes. Our results represent a significant step towards optical manipulation and sorting of carbon nanotubes based on their chiral vector.

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