Abstract

Free-space carpet cloak designed with transformation optics requires materials exhibiting simultaneously anisotropic properties and plasma-like behaviors, but materials that simultaneously meet these requirements are rarely found in nature. The recently discovered graphene has shown unique anisotropic plasma-like behavior benefitting from its natural two-dimensional structure and in-plane ultrahigh electron mobility, and therefore, can be a good candidate for the free-space carpet cloak design. In this Letter, we theoretically propose a novel free-space carpet cloak by using periodically stacking layered graphene for the first time. Simulation results show an object under the graphene-based carpet cloak becomes invisible in the THz frequencies. By exploiting the large tunability of graphene’s conductivity, we also demonstrate the working frequency of the designed cloak is continuously tunable in a wide spectrum.

© 2014 Optical Society of America

Compact-sized and broadband carpet cloak and free-space cloak

Hui Feng Ma, Wei Xiang Jiang, Xin Mi Yang, Xiao Yang Zhou, and Tie Jun Cui
Opt. Express 17(22) 19947-19959 (2009)

Carpet cloaking on a dielectric half-space

Pu Zhang, Michaël Lobet, and Sailing He
Opt. Express 18(17) 18158-18163 (2010)

Photorealistic rendering of unidirectional free-space invisibility cloaks

Jad C. Halimeh and Martin Wegener
Opt. Express 21(8) 9457-9472 (2013)

Full three-dimensional isotropic carpet cloak designed by quasi-conformal transformation optics

Daniely G. Silva, Poliane A. Teixeira, Lucas H. Gabrielli, Mateus A. F. C. Junqueira, and Danilo H. Spadoti
Opt. Express 25(19) 23517-23522 (2017)

New procedure to design low radar cross section near perfect isotropic and homogeneous triangular carpet cloaks

Zohreh Sharifi and Zahra Atlasbaf
J. Opt. Soc. Am. A 33(10) 2066-2070 (2016)