Open AccessFar field free-space measurement of three dimensional hole –in –Teflon invisibility cloak
Author(s) -
Ning Wang,
Yungui Ma,
Renliang Huang,
C. K. Ong
Publication year - 2013
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.21.005941
Subject(s) - cloak , cloaking , optics , free space , polarization (electrochemistry) , conformal map , metamaterial , scattering , transformation optics , materials science , physics , geometry , chemistry , mathematics
In this paper, we report a fabrication of a three-dimensional (3D) carpet cloak that works for any polarization in free space. Two-dimensional (2D) conformal mapping is first employed and the 3D structure is generated by a rotation of the 2D cloak. The structure of the cloak is hole-in-dielectric. The triangular invisible region has a height of 36 mm (one third of the height of the whole device) and a width of 240 mm. The cloaking effect is examined in free space by measuring the scattering parameters. The results show our device has very good cloaking performance in a wide frequency range from 4 to 10 GHz.