Article

Unusual optical properties of aligned carbon nanotube mats in infrared energy region.

Department of Physics and High Performance Computing Laboratory, Southern University and A & M College, Baton Rouge, Louisiana 70813, USA.
Journal of Nanoscience and Nanotechnology (impact factor: 1.56). 03/2009; 9(2):1603-6.
Source: PubMed

ABSTRACT We studied the optical properties of aligned carbon nanotube mats for photonic device applications. We employed ab-initio density functional calculations in the linear combination of atomic orbital formalism. The calculated dielectric functions of the semiconducting carbon nanotube mats show a strong anisotropy when the electric field of the light is parallel or perpendicular to the tube axes. Especially, there are strong optical absorptions near the band edges in the infrared energy region, when the electric field of the light is parallel to the carbon nanotube axes. The unusual optical properties of the semiconducting carbon nanotube mats present a new opportunity for applications in electro-optical devices in the infrared energy region.

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Keywords

ab-initio density functional calculations
 
atomic orbital formalism
 
calculated dielectric functions
 
electro-optical devices
 
linear combination
 
new opportunity
 
optical properties
 
perpendicular
 
photonic device applications
 
strong anisotropy
 
unusual optical properties