Restoring of optical resonances in subwavelength hyperbolic etalons

Details Restoring of optical resonances in subwavelength hyperbolic etalons Restoring of optical resonances in subwavelength hyperbolic etalons

2011-09-23

arxiv.org/abs/1109.5101v1

Physics

Optics

5 pages, 4 figures

Scientific paper

We give a solution to the fundamental problem of restoring optical resonances in deep subwavelength structures by resorting to indefinite metamaterials. We prove that a nanometric thick hyperbolic slab with very small permittivities exhibits etalon resonances and provides high-contrast optical angular filtering. This is possible since the hyperbolic dispersion allows the vacuum radiation to couple with medium plane waves with longitudinal wavenumbers large enough to yield optical standing waves within the nanometric slab thickness. Our findings can form the basis of a novel way for shrinking optical devices down to the deep subwavelength scale.

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