Coherent monochromatic phonons in highly-purified semiconducting single-wall carbon nanotubes

Autor:	Honda, Yuki, Maret, Elizabeth, Hirano, Atsushi, Tanaka, Takeshi, Makino, Kotaro, Hase, Muneaki
Rok vydání:	2013
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science
Zdroj:	Appl. Phys. Lett. 102, 222109 (2013)
Druh dokumentu:	Working Paper
DOI:	10.1063/1.4809604
Popis:	We have used a femtosecond pump-probe impulsive Raman technique to explore the polarization dependence of coherent optical phonons in highly-purified and aligned semiconducting single-wall carbon nanotubes (SWCNTs). Coherent phonon spectra for the radial breathing modes (RBMs) exhibit a different monochromatic frequency between the film and solution samples, indicating the presence of differing exciton excitation processes. By varying the polarization of the incident pump beam on the aligned SWCNT film, we found that the anisotropy of the coherent RBM excitation depends on the laser wavelength, which we consider to be associated with the resonant and off-resonant behavior of RBM excitation. Comment: 4 pages, 4 figures, accepted for publication in Appl. Phys. Lett
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1305.4707 Zobrazit plný text záznamu View this record from Arxiv