Ideal Cylindrical Cloak: Perfect but Sensitive to Tiny Perturbations

Zhichao Ruan, Min Yan, Curtis W. Neff, and Min Qiu

Phys. Rev. Lett. 99, 113903 – Published 14 September 2007

Abstract

A cylindrical wave expansion method is developed to obtain the scattering field for an ideal two-dimensional cylindrical invisibility cloak. A near-ideal model of the invisibility cloak is set up to solve the boundary problem at the inner boundary of the cloak shell. We confirm that a cloak with the ideal material parameters is a perfect invisibility cloak by systematically studying the change of the scattering coefficients from the near-ideal case to the ideal one. However, because of the slow convergence of the zeroth-order scattering coefficients, a tiny perturbation on the cloak would induce a noticeable field scattering and penetration.

Received 8 May 2007

DOI:https://doi.org/10.1103/PhysRevLett.99.113903

Authors & Affiliations

Zhichao Ruan^1,2, Min Yan¹, Curtis W. Neff¹, and Min Qiu^1,*

¹Laboratory of Optics, Photonics and Quantum Electronics, Department of Microelectronics and Applied Physics, Royal Institute of Technology (KTH), Electrum 229, 16440 Kista, Sweden
²Joint Research Center of Photonics of the Royal Institute of Technology (Sweden) and Zhejiang University, Zhejiang University, Yu-Quan, 310027 Hangzhou, People’s Republic of China

^*Corresponding author. min@kth.se

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 99, Iss. 11 — 14 September 2007

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review Letters