3D Visible‐Light Invisibility Cloak. Issue 6 (14th April 2018)

• Record Type: Journal Article
• Authors: Zheng, Bin; Zhu, Rongrong; Jing, Liqiao; Yang, Yihao; Shen, Lian; Wang, Huaping; Wang, Zuojia; Zhang, Xianmin; Liu, Xu; Li, Erping; Chen, Hongsheng
• Is Part Of: Advanced science. Volume 5:Issue 6(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-04-14
• Subjects: 3D -- invisibility cloaks -- transformation optics -- visible light; Science -- Periodicals; 505
• DOI: 10.1002/advs.201800056
• Languages: English
• ISSNs: 2198-3844

Abstract

Abstract: The concept of an invisibility cloak is a fixture of science fiction, fantasy, and the collective imagination. However, a real device that can hide an object from sight in visible light from absolutely any viewpoint would be extremely challenging to build. The main obstacle to creating such a cloak is the coupling of the electromagnetic components of light, which would necessitate the use of complex materials with specific permittivity and permeability tensors. Previous cloaking solutions have involved circumventing this obstacle by functioning either in static (or quasistatic) fields where these electromagnetic components are uncoupled or in diffusive light scattering media where complex materials are not required. In this paper, concealing a large‐scale spherical object from human sight from three orthogonal directions is reported. This result is achieved by developing a 3D homogeneous polyhedral transformation and a spatially invariant refractive index discretization that considerably reduce the coupling of the electromagnetic components of visible light. This approach allows for a major simplification in the design of 3D invisibility cloaks, which can now be created at a large scale using homogeneous and isotropic materials. Abstract : A 3D invisibility cloak is reported that can hide macroscopic objects from three orthogonal directions. With an approach of a 3D homogeneous polyhedral transformation and a spatially invariant refractive index discretization, the cloak can conceal a large‐scale object from human sight.