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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 9 — Apr. 25, 2011
  • pp: 8610–8615

Gain-assisted transformation optics

Tiancheng Han, Cheng-Wei Qiu, Jiaming Hao, Xiaohong Tang, and Said Zouhdi  »View Author Affiliations

Optics Express, Vol. 19, Issue 9, pp. 8610-8615 (2011)

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Loss severely degrades the cloaking effect of the device designed by traditional transformation. In this letter, we propose gain-assisted transformation optics to overcome the loss problem by introducing gain media into a spherical cloak. The gain media, which can amplify the electromagnetic fields, is controlled precisely to compensate the inherent loss in experimental realization of cloaks. We discuss the significance of controlling embedded gain materials in the context of the inverse design mechanism, which allows us to wisely select realizable materials with constant gain and loss along the radius. For practical realizations, isotropic spherical gain-assisted cloak is designed. Full-wave simulations validate the proposed design concept, which can be utilized to alleviate the inevitable loss problem in transformational optical devices.

© 2011 OSA

OCIS Codes
(160.1190) Materials : Anisotropic optical materials
(230.0230) Optical devices : Optical devices
(260.2065) Physical optics : Effective medium theory
(160.3918) Materials : Metamaterials

ToC Category:
Physical Optics

Original Manuscript: March 7, 2011
Manuscript Accepted: March 28, 2011
Published: April 18, 2011

Tiancheng Han, Cheng-Wei Qiu, Jiaming Hao, Xiaohong Tang, and Said Zouhdi, "Gain-assisted transformation optics," Opt. Express 19, 8610-8615 (2011)

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