Goos-Hanchen shift and time delay in dispersive nonlinear media
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We present an analysis of the influence of the Goos-Hanchen effect on tunneling times, group delay and dwell time, of electromagnetic waves propagating through an obstacle made of left-handed metamaterial embedded in a dielectric which exhibits saturable type of nonlinearity. The derived equations show that only the group delay, is affected by the Goos-Hanchen shift without any impact on the dwell time. Besides the reduction of the group delay, the most remarkable result is the possibility for total reduction of the Goos-Hanchen shift for finite incident angles. These phenomena are observable in the frequency region for which metamaterial exhibits negative index of refraction. (C) 2011 Elsevier B.V. All rights reserved.
Ključne reči:Tunneling times / Goos-Hanchen shift / Nonlinear optics
Izvor:Physics Letters A, 2011, 375, 10, 1357-1361
- Fotonika mikro i nano strukturnih materijala (RS-45010)
- NATO [CBP.EAP.CLG 983316]