Imperfect Cloaking Devices Based on Metamaterials
نویسندگان
چکیده
منابع مشابه
Optical cloaking with metamaterials
Artificially structured metamaterials have enabled unprecedented flexibility in manipulating electromagnetic waves and producing new functionalities, including the cloak of invisibility based on coordinate transformation. Unlike other cloaking approaches4–6, which are typically limited to subwavelength objects, the transformation method allows the design of cloaking devices that render a macros...
متن کاملParallel-plate metamaterials for cloaking structures.
In this work, we assess theoretically the physical response of metamaterial composite structures that emulate the behavior of negative-permittivity materials in certain relevant setups. The metamaterials under analysis consist of metallic parallel-plate implants embedded in a dielectric host in a two-dimensional geometry. Simple design rules and formulas are presented, fully considering the eff...
متن کاملPhotonic Crystal Based Subwavelength Imaging and Cloaking Optical Devices
Potentialities of 2.5D dielectric photonic crystals for subwavelength imaging or invisibility cloaking operation at optical wavelengths are studied numerically and experimentally. First, a negative refraction based flat lens is designed, fabricated and characterized. Using scanning near-field optical microscopy, subwavelength imaging (0.8λ) for a deduced refractive index of −1 is obtained at 1....
متن کاملAnisotropic metamaterials emulated by tapered waveguides: application to optical cloaking.
We demonstrate that metamaterial devices requiring anisotropic dielectric permittivity and magnetic permeability may be emulated by specially designed tapered waveguides. This approach leads to low-loss, broadband performance. Based on this technique, we demonstrate broadband electromagnetic cloaking in the visible frequency range on a scale approximately 100 times larger than the wavelength.
متن کاملDraft: Theory and Design of Practical Metamaterials for Acoustic Cloaking
Significant research has recently been dedicated to reducing the interaction between acoustic waves and given objects. The coordinate transformation theory provides an elegant approach to the design of coatings capable of reaching this goal. First demonstrated for electromagnetic waves [1], this method has later been adapted to acoustic waves [2–5]. Its appeal stems from its generality: it can ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Acta Physica Polonica A
سال: 2007
ISSN: 0587-4246,1898-794X
DOI: 10.12693/aphyspola.112.1083