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.
Keywords:Tunneling times / Goos-Hanchen shift / Nonlinear optics
Source:Physics Letters A, 2011, 375, 10, 1357-1361
- Photonics of micro and nano structured materials (RS-45010)
- NATO [CBP.EAP.CLG 983316]