Sat, 19 Jul 2008 04:37:08 BST CiteULike: norris's Neff http://www.citeulike.org/user/norris/author/Neff CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/norris/article/2185551 <i>Physical Review Letters, Vol. 99, No. 11. (2007)</i><br /><br />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. Ideal Cylindrical Cloak: Perfect but Sensitive to Tiny Perturbations Zhichao Ruan Min Yan Curtis Neff Min Qiu doi:10.1103/PhysRevLett.99.113903 Physical Review Letters, Vol. 99, No. 11. (2007) 2008-01-01T16:44:37-00:00 2007 Physical Review Letters 99 11 APS cloaking metamaterial