Physics – Optics
Scientific paper
2007-10-19
Physical Review Letters, 100, 063904 (2008)
Physics
Optics
Scientific paper
10.1103/PhysRevLett.100.063904
The electromagnetic field solution for a spherical invisibility cloak with an active device inside is established. Extraordinary electric and magnetic surface voltages are induced at the inner boundary of a spherical cloak, which prevent electromagnetic waves from going out. The phase and handness of polarized waves obliquely incident on such boundaries is kept in the reflected waves. The surface voltages due to an electric dipole inside the concealed region are found equal to the auxiliary scalar potentials at the inner boundary, which consequently gain physical counterparts in this case.
Chen Hongsheng
Kong Jin Au
Wu Bae-Ian
Zhang Baile
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