## Nonideal ultrathin mantle cloak for electrically large conducting cylinders |

JOSA A, Vol. 31, Issue 9, pp. 2075-2082 (2014)

http://dx.doi.org/10.1364/JOSAA.31.002075

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### Abstract

Based on the concept of the scattering cancellation technique, we propose a nonideal ultrathin mantle cloak that can efficiently suppress the total scattering cross sections of an electrically large conducting cylinder (over one free-space wavelength). The cloaking mechanism is investigated in depth based on the Mie scattering theory and is simultaneously interpreted from the perspective of far-field bistatic scattering and near-field distributions. We remark that, unlike the perfect transformation-optics-based cloak, this nonideal cloaking technique is mainly designed to minimize simultaneously several scattering multipoles of a relatively large geometry around considerably broad bandwidth. Numerical simulations and experimental results show that the antiscattering ability of the metasurface gives rise to excellent total scattering reduction of the electrically large cylinder and remarkable electric-field restoration around the cloak. The outstanding cloaking performance together with the good features of and ultralow profile, flexibility, and easy fabrication predict promising applications in the microwave frequencies.

© 2014 Optical Society of America

**OCIS Codes**

(260.2110) Physical optics : Electromagnetic optics

(160.3918) Materials : Metamaterials

(230.3205) Optical devices : Invisibility cloaks

**ToC Category:**

Optical Devices

**History**

Original Manuscript: May 30, 2014

Manuscript Accepted: July 25, 2014

Published: August 29, 2014

**Citation**

Shuo Liu, Hao Chi Zhang, He-Xiu Xu, and Tie Jun Cui, "Nonideal ultrathin mantle cloak for electrically large conducting cylinders," J. Opt. Soc. Am. A **31**, 2075-2082 (2014)

http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-9-2075

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