Abstract
We show that the curvature effects in quasi-metallic carbon nanotubes and edge effects in narrow-gap graphene nanoribbons not only open band gaps in the THz range but also result in giant enhancement of the transition probabilities across these gaps. This makes these nanostructures perspective candidates for sources and detectors of THz radiation.
Highlights
Creating reliable, portable, tunable sources and detectors of terahertz (THz) radiation is one of the most challenging tasks of contemporary applied physics
We show that the curvature effects in quasi-metallic carbon nanotubes and edge effects in narrow-gap graphene nanoribbons open band gaps in the THz range and result in giant enhancement of the transition probabilities across these gaps
We focus on direct interband dipole transitions in narrow-gap carbon nanotubes (CNTs) and graphene nanoribbons (GNRs)
Summary
Portable, tunable sources and detectors of terahertz (THz) radiation is one of the most challenging tasks of contemporary applied physics. We show that the curvature effects in quasi-metallic carbon nanotubes and edge effects in narrow-gap graphene nanoribbons open band gaps in the THz range and result in giant enhancement of the transition probabilities across these gaps.
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