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All‐Angle Self‐Collimation‐Based Invisibility Cloaking in 2D Square Lattice Photonic Crystals
Author(s) -
Karimpour Saied,
Noori Mina
Publication year - 2020
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.202000026
Subject(s) - cloaking , finite difference time domain method , photonic crystal , negative refraction , optics , square lattice , invisibility , collimated light , physics , dielectric , refractive index , materials science , metamaterial , condensed matter physics , optoelectronics , laser , ising model
Here, a two‐dimensional (2D) hole‐type square lattice photonic crystal is shown to achieve invisibility cloaking based on all‐angle self‐collimation. The proposed structure, which is composed of the high‐refraction‐index dielectric material PbTe ( n PbTe ≈ 6), is applicable in the mid‐infrared (mid‐IR) frequency range. The cloaking region is capable of hiding any object of any shape and size since the incoming wave does not interact with the cloaked object. The optimization process and the functionality of the proposed structure are investigated by equal frequency contour analysis and the finite difference time domain (FDTD) method.