Abstract

We show that it is possible to design an invisible wavelength-sized metal-dielectric metamaterial object without evoking cloaking. Our approach is an extension of the neutral inclusion concept by Zhou and Hu [Phys. Rev. E 74, 026607 (2006) [CrossRef]  ] to Mie scatterers. We demonstrate that an increase of metal fraction in the metamaterial leads to a transition from dielectric-like to metal-like scattering, which proceeds through invisibility or optical neutrality of the scatterer. Formally this is due to cancellation of multiple scattering orders, similarly to plasmonic cloaking introduced by Alù and Engheta [Phys. Rev. E 72, 016623 (2005) [CrossRef]  ], but without introduction of the separation of the scatterer into cloak and hidden regions.

© 2017 Optical Society of America

Uncloaking diffusive-light invisibility cloaks by speckle analysis

Andreas Niemeyer, Frederik Mayer, Andreas Naber, Milan Koirala, Alexey Yamilov, and Martin Wegener
Opt. Lett. 42(10) 1998-2001 (2017)

Transient response of a signal through a dispersive invisibility cloak

Chao Qian, Rujiang Li, Yuyu Jiang, Bin Zheng, Huaping Wang, Zhiwei Xu, and Hongsheng Chen
Opt. Lett. 41(21) 4911-4914 (2016)

Fourier optics theory for invisibility cloaks

Kedi Wu, Qiluan Cheng, and Guo Ping Wang
J. Opt. Soc. Am. B 28(6) 1467-1474 (2011)

Optically switchable directional invisibility

Elisa Hurwitz and Greg Gbur
Opt. Lett. 42(7) 1301-1304 (2017)

Diffuse-light all-solid-state invisibility cloak

Robert Schittny, Andreas Niemeyer, Muamer Kadic, Tiemo Bückmann, Andreas Naber, and Martin Wegener
Opt. Lett. 40(18) 4202-4205 (2015)