Positive and negative giant Goos-Hänchen shift in a near-symmetric layered medium for illumination from opposite ends

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Abstract

We study giant Goos-Hänchen (GH) shift in reflection from a near-symmetric coupled waveguide structure. We show that broken spatial symmetry can lead to GH shift with different signs for illumination from the opposite ends, a direct consequence of the nonreciprocity relations considered earlier (Opt. Lett. 27,1205 (2002)). We show that the asymmetry due to a tiny 5 nm displacement of the coupled guide to one side can result in giant differential shifts. Due attention is paid to possible beam splittings for tightly focused beams in resonant structures. © 2011 Elsevier B.V. All rights reserved.

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Kumari, M., & Dutta Gupta, S. (2012). Positive and negative giant Goos-Hänchen shift in a near-symmetric layered medium for illumination from opposite ends. Optics Communications, 285(5), 617–620. https://doi.org/10.1016/j.optcom.2011.10.100

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