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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Grover Swartzlander
  • Vol. 30, Iss. 10 — Oct. 1, 2013
  • pp: 2684–2688

Flat lensing by periodic loss-modulated materials

N. Kumar, R. Herrero, M. Botey, and K. Staliunas  »View Author Affiliations


JOSA B, Vol. 30, Issue 10, pp. 2684-2688 (2013)
http://dx.doi.org/10.1364/JOSAB.30.002684


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Abstract

We propose a flat lensing effect using a periodic loss-modulated material. In particular, we consider a two-dimensional square and rhombic arrangement of lossy cylinders embedded in a host media with the same refractive index. The effect is predicted by the dispersion curves obtained by a coupled mode expansion of Maxwell equations and by numerical beam propagation experiments. From both analytical and numerical studies, we show that, for a range of frequencies, light beams undergo negative diffraction on propagation through the loss-modulated medium, providing a window of high transmission. The phase shifts accumulated by negative diffraction within the structure are then compensated by normal diffraction, leading to substantial focalization beyond it.

© 2013 Optical Society of America

OCIS Codes
(160.4670) Materials : Optical materials
(260.1960) Physical optics : Diffraction theory
(290.5830) Scattering : Scattering, Brillouin
(160.3918) Materials : Metamaterials
(160.5298) Materials : Photonic crystals

ToC Category:
Materials

History
Original Manuscript: June 7, 2013
Revised Manuscript: July 24, 2013
Manuscript Accepted: August 10, 2013
Published: September 23, 2013

Citation
N. Kumar, R. Herrero, M. Botey, and K. Staliunas, "Flat lensing by periodic loss-modulated materials," J. Opt. Soc. Am. B 30, 2684-2688 (2013)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-30-10-2684

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