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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 38, Iss. 18 — Sep. 15, 2013
  • pp: 3658–3660

Kapitza homogenization of deep gratings for designing dielectric metamaterials

Carlo Rizza and Alessandro Ciattoni  »View Author Affiliations


Optics Letters, Vol. 38, Issue 18, pp. 3658-3660 (2013)
http://dx.doi.org/10.1364/OL.38.003658


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Abstract

We theoretically investigate the homogenization of the dielectric response to transverse electric waves of a transverse grating characterized by the Kapitza condition; i.e., the permittivity is rapidly modulated with a modulation depth scaling as the large wavelength-to-modulation-period ratio. We show that the resulting effective dielectric permittivity, in addition to the standard average of the underlying dielectric profile, has a further contribution arising from the fast and deep dielectric modulation. Such a contribution turns out to be comparable with the other one and hence can provide an additional method for designing dielectric metamaterials. As an example, we discuss an effective metal-to-dielectric transition produced by the Kapitza contribution obtained by changing the grating depth, a remarkable result for applications involving epsilon-near-zero metamaterial design.

© 2013 Optical Society of America

OCIS Codes
(050.2065) Diffraction and gratings : Effective medium theory
(260.2065) Physical optics : Effective medium theory
(160.3918) Materials : Metamaterials

ToC Category:
Materials

History
Original Manuscript: May 30, 2013
Manuscript Accepted: August 16, 2013
Published: September 12, 2013

Citation
Carlo Rizza and Alessandro Ciattoni, "Kapitza homogenization of deep gratings for designing dielectric metamaterials," Opt. Lett. 38, 3658-3660 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-18-3658


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