Radiation force mediated by exciton of a carbon nanotube

Abstract

Resonant radiation force exerted on a single‐walled carbon nanotube is theoretically studied. Even under weak laser irradiation at room temperature, the acceleration of a nanotube caused by a radiation force becomes significantly large in the resonant excitation conditions of an exciton. The spectral peak frequencies of the acceleration are sensitive to the diameter of nanotubes and to the light polarization. These features are quite useful for nondestructive remote sorting and collection of nanotubes with desired structure and alignment. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Size- and orientation-selective optical manipulation of single-walled carbon nanotubes: A theoretical study

“…22, we briefly reported a theoretical investigation of the radiation force mediated by exciton of SWCNs for propagating laser field. 23 In our previous work, exciton states around K and KЈ points were treated independently. However, optically allowed or bright states of exciton form bonding states of singlet K and KЈ excitons.…”

Theory of Radiation Force on Carbon Nanotubes

“…At almost the same time, we have presented a theoretical study of radiation force mediated by exciton for propergating laser field. 11) In this applied field, a dissipative force is exerted on SWCNs in the same direction of the laser field, and thus, we can selectively transport SWCNs of desired properties. In this paper, we calculate gradient force in order to trap SWCNs as well as the dissipative force, and explore the possiblity of the selective trapping and manipulation of SWCNs.…”