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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry van Driel
  • Vol. 27, Iss. 10 — Oct. 1, 2010
  • pp: 2132–2140

Power scattering and absorption mediated by cloak/anti-cloak interactions: a transformation-optics route toward invisible sensors

Giuseppe Castaldi, Ilaria Gallina, Vincenzo Galdi, Andrea Alù, and Nader Engheta  »View Author Affiliations


JOSA B, Vol. 27, Issue 10, pp. 2132-2140 (2010)
http://dx.doi.org/10.1364/JOSAB.27.002132


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Abstract

The suggestive idea of “cloaking” an electromagnetic sensor, i.e., strongly reducing its visibility (scattering) while maintaining its field-sensing (absorption) capabilities, has recently been proposed in the literature, based on scattering-cancellation, Fano-resonance, or transformation-optics approaches. In this paper, we explore an alternative transformation-optics-based route, which relies on the recently introduced concept of “anti-cloaking.” More specifically, our proposed approach relies on a suitable tailoring of the competing cloaking and anti-cloaking mechanisms, interacting in a two-dimensional cylindrical scenario. Via analytical and parametric studies, we illustrate the underlying phenomenology, identify the critical design parameters, and address the relevant optimality and trade-off issues, taking also into account the effect of material losses. Our results confirm the envisaged potentials of the proposed transformation-optics approach as an attractive alternative route to sensor cloaking.

© 2010 Optical Society of America

OCIS Codes
(160.1190) Materials : Anisotropic optical materials
(230.0230) Optical devices : Optical devices
(260.2110) Physical optics : Electromagnetic optics
(260.2710) Physical optics : Inhomogeneous optical media
(230.3205) Optical devices : Invisibility cloaks

ToC Category:
Optical Devices

History
Original Manuscript: July 15, 2010
Revised Manuscript: August 23, 2010
Manuscript Accepted: August 23, 2010
Published: September 24, 2010

Citation
Giuseppe Castaldi, Ilaria Gallina, Vincenzo Galdi, Andrea Alù, and Nader Engheta, "Power scattering and absorption mediated by cloak/anti-cloak interactions: a transformation-optics route toward invisible sensors," J. Opt. Soc. Am. B 27, 2132-2140 (2010)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-27-10-2132

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