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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 19 — Sep. 15, 2008
  • pp: 14655–14660

Limitations of high-order transformation and incident angle on simplified invisibility cloaks

Baile Zhang, Hongsheng Chen, and Bae-Ian Wu  »View Author Affiliations

Optics Express, Vol. 16, Issue 19, pp. 14655-14660 (2008)

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We studied the scattering from the simplified cylindrical cloaks analytically at both normal and oblique incidences. We found that these simplified cylindrical cloaks may produce a larger scattering at nonnormal incidences than that from an object without any cloak, making this object more “visible”. Even at normal incidence, the high-order transformation with impedance matched at the outer boundary can produce stronger scattering than the linear simplified one without matched impedance. This is due to the inefficiency of guided waves close to the inner boundary. Therefore, a square root transformation can improve scattering by guiding waves away from the inner boundary.

© 2008 Optical Society of America

OCIS Codes
(230.3205) Optical devices : Invisibility cloaks
(290.5839) Scattering : Scattering, invisibility

ToC Category:
Physical Optics

Original Manuscript: June 24, 2008
Revised Manuscript: July 8, 2008
Manuscript Accepted: July 9, 2008
Published: September 3, 2008

Baile Zhang, Hongsheng Chen, and Bae-Ian Wu, "Limitations of high-order transformation and incident angle on simplified invisibility cloaks," Opt. Express 16, 14655-14660 (2008)

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Fig. 1. Fig. 2. Fig. 3.

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