We propose a one-way invisible cloak using transformation optics of parity-time (PT) symmetric optical materials. At the spontaneous PT-symmetry breaking point, light is scattered only for incidence along one direction since the phase-matching condition is unidirectionally satisfied, making the cloak one-way invisible. Moreover, optical scattering from the one-way cloak can be further engineered to realize more interesting effects, for example, creating a unidirectional optical illusion of the concealed object.
© 2013 Optical Society of America
Original Manuscript: May 22, 2013
Revised Manuscript: July 2, 2013
Manuscript Accepted: July 4, 2013
Published: July 29, 2013
Xuefeng Zhu, Liang Feng, Peng Zhang, Xiaobo Yin, and Xiang Zhang, "One-way invisible cloak using parity-time symmetric transformation optics," Opt. Lett. 38, 2821-2824 (2013)