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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 9 — Apr. 25, 2011
  • pp: 8625–8631

Homogeneous optical cloak constructed with uniform layered structures

Jingjing Zhang, Liu Liu, Yu Luo, Shuang Zhang, and Niels Asger Mortensen  »View Author Affiliations


Optics Express, Vol. 19, Issue 9, pp. 8625-8631 (2011)
http://dx.doi.org/10.1364/OE.19.008625


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Abstract

The prospect of rendering objects invisible has intrigued researchers for centuries. Transformation optics based invisibility cloak design is now bringing this goal from science fictions to reality and has already been demonstrated experimentally in microwave and optical frequencies. However, the majority of the invisibility cloaks reported so far have a spatially varying refractive index which requires complicated design processes. Besides, the size of the hidden object is usually small relative to that of the cloak device. Here we report the experimental realization of a homogenous invisibility cloak with a uniform silicon grating structure. The design strategy eliminates the need for spatial variation of the material index, and in terms of size it allows for a very large obstacle/cloak ratio. A broadband invisibility behavior has been verified at near-infrared frequencies, opening up new opportunities for using uniform layered medium to realize invisibility at any frequency ranges, where high-quality dielectrics are available.

© 2011 OSA

OCIS Codes
(160.3918) Materials : Metamaterials
(230.3205) Optical devices : Invisibility cloaks

ToC Category:
Metamaterials

History
Original Manuscript: March 18, 2011
Revised Manuscript: April 9, 2011
Manuscript Accepted: April 10, 2011
Published: April 19, 2011

Citation
Jingjing Zhang, Liu Liu, Yu Luo, Shuang Zhang, and Niels Asger Mortensen, "Homogeneous optical cloak constructed with uniform layered structures," Opt. Express 19, 8625-8631 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-9-8625


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