The Effect of Intraband Transitions on the Optical Spectra of Metallic Carbon Nanotubes
T. Movlarooy*
Department of Physics, University of Shahrood, Shahrood, Iran
Abstract ：First-principles calculations of the electronic structure and linear optical properties of metallic carbon nanotubes are carried out using the full-potential linear-augmented plane-wave method. The effect of intraband transition and electric-field polarization on the optical spectra of (5,2) chiral, (15,0) zigzag, and (8,8) armchair metallic carbon nanotubes are investigated. The optical spectra are calculated for both electric-field polarizations, parallel and perpendicular to the axis of the tube. It is revealed that the optical spectra are anisotropic along these two polarizations. For the parallel polarization to the tube axis, adding the intraband transition contributions shows that the dielectric function has singularity at zero frequency due to the screening effect in metallic carbon nanotubes.
收稿日期: 2013-03-07
出版日期: 2013-11-21
:
73.22.-f
(Electronic structure of nanoscale materials and related systems)
78.20.Bh
(Theory, models, and numerical simulation)
78.67.-n
(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
78.67.Ch
(Nanotubes)
[1] Iijima S 1991 Nature 354 56 1998 Phys. Rev. B 57 9301 2000 Phys. Rev. B 62 6971 2000 Phys. Rev. Lett. 85 5218 2002 Phys. Rev. B 66 155404 2002 Science 298 2361 2001 Phys. Rev. Lett. 87 127401 2002 Science 297 593 2009 Nano Lett. 9 1330 2004 Phys. Rev. Lett. 92 125502 2008 Phys. Rev. Lett. 101 047402 2004 Nanotechnology 15 1000 2005 Phys. Rev. B 71 033404 2012 Phys. Status Solidi B 249 1027 2007 Nano Lett. 7 1626 2010 Comput. Mater. Sci. 49 450 2011 Int. J. Nanosci. 10 587 2004 Phys. Rev. Lett. 92 077402 2004 Phys. Rev. Lett. 92 196401 2003 Phys. Rev. Lett. 91 046402 2004 Appl. Phys. A 78 1157 1992 Phys. Rev. B 46 1321 1996 Phys. Rev. Lett. 77 3865 2000 Comput. Phys. Commun. 126 294 Optical Properties of Solids (New York: Academic Press) chap 62006 Comput. Phys. Commun. 175 1
[1]
.
[2]
.
[3]
.
[4]
.
[5]
.
[6]
.
[7]
.
[8]
.
[9]
.
[10]
.
[11]
.
[12]
.
[13]
.
[14]
.
[15]
.
2013, Vol. 30 
