Gain-assisted slow to superluminal group velocity manipulation in nano-waveguides

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dc.creatorGovyadinov, Alexander A.
dc.creatorPodolskiy, Viktor A.
dc.date2006-08-09
dc.date2006-08-12
dc.date.accessioned2026-07-07T07:25:44Z
dc.date.available2026-07-07T07:25:44Z
dc.descriptionWe study the energy propagation in subwavelength waveguides and demonstrate that the mechanism of material gain, previously suggested for loss compensation, is also a powerful tool to manipulate dispersion and propagation characteristics of electromagnetic pulses at the nanoscale. We show theoretically that the group velocity in lossy nano-waveguides can be controlled from slow to superluminal values by the material gain and waveguide geometry and develop an analytical description of the relevant physics. We utilize the developed formalism to show that gain-assisted dispersion management can be used to control the transition between ``photonic-funnel'' and ``photonic-compressor'' regimes in tapered nano-waveguides. The phenomenon of strong modulation of group velocity in subwavelength structures can be realized in waveguides with different geometries, and is present for both volume and surface-modes.
dc.descriptionSome changes in the abstract and Fig.1. No results affected
dc.identifierhttps://arxiv.org/abs/physics/0608097
dc.identifierhttp://arxiv.org/abs/physics/0608097
dc.identifierPhys. Rev. Lett. v.97, p.223902 (2006)
dc.identifierdoi:10.1103/PhysRevLett.97.223902
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/116823
dc.subjectOptics
dc.titleGain-assisted slow to superluminal group velocity manipulation in nano-waveguides
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