Metamaterial cloaking is the usage of metamaterials in an invisibility cloak.This is accomplished by manipulating the paths traversed by light through a novel optical material. Metamaterials direct and control the propagation and transmission of specified parts of the light spectrum and demonstrate the potential to render an object seemingly invisible.

2022年4月28日 · Perhaps the critical advance that could finally bring an invisibility cloak to reality occurred in 2018, in a novel material called a broadband achromatic metalens. For the first time, it rendered ...

2023年7月4日 · The future of invisibility cloaks. In the military domain, cloaking technology could revolutionize stealth operations, rendering military assets invisible to radar or surveillance systems.

2024年2月1日 · Cloaking technology has garnered significant attention in recent years due to its potential applications in various domains, including structural engineering, materials science, and defense, as the simuated cloaking can be seen in Fig. 8 [46]. Piezoelectric materials have emerged as a promising avenue for achieving invisibility to elastic waves ...

2009年3月1日 · Here we will review cloaking techniques based on scattering cancellation, on coordinate transformations, and on the use of artificial materials realized as dense meshes of transmission lines 10.There are some other techniques, like the use of artificial electromagnetic surfaces, which allow to hide objects of certain special shapes for a single direction of illumination 11 or the use of ...

2020年5月21日 · A cloak is a coating material that makes an object indistinguishable from its surroundings or undetectable by external field measurements. New Cloaking Material Could Protect Buildings, Soldiers Stealth technology, the idea of reducing the ability of the enemy to detect an object, has driven advances in military research for decades.

2007年4月2日 · Figure 2: Material parameters ɛ r, ɛ θ and μ z of the proposed cloak operating at λ = 632.8 nm. The solid lines represent the exact set of reduced parameters determined by equation (2).

2022年10月1日 · The authors fabricated a multilayered cylindrical mass diffusion cloak made of six different types of concrete with varying amounts of cement, glue, and sand to satisfy required material parameters for cloaking. The chloride ion concentrations were measured and the ions were shown to be redirected around the steel bars located at the center.

There has been extensive development in the study of cloaking technology since the discovery of metamaterials. Different from "stealth" technology used for military purposes, cloaking refers to a total annihilation of the scattering of electromagnetic waves in all directions, and thus achieving invisibility as depicted in mythology and sci-fiction. Because of its scientific importance and the ...

2012年11月20日 · The upward deformation limit for the self-adjustable smart cloak is ultimately restricted by the permittivity magnitude (ε d) of the dielectric material. Without a cloak, as shown in Fig. 4i, the ...