Abstract
Electromagnetic scattering has applications in astrophysics, atmospheric science, and medical imaging. Researchers design a metamaterial that exhibits anomalously weak scattering over a band of optical frequencies.
Highlights
Electromagnetic (EM) wave scattering is a ubiquitous phenomenon in systems with refractive index contrast between an obstacle and the surrounding material [1]
In contrast to strong plasmonic scattering from pure metallic structures, patterns of various sizes ranging from deep-subwavelength to wavelength scale in Au-Si multilayer hyperbolic metamaterials (HMMs) become invisible in a manner that is not achievable with natural metallic or high-index materials
Such anomalously weak scattering (AWS) from metamaterials comprised of conductive components is possible when the permittivity of the HMMs along the direction of the incident electric field impedance matches with the surrounding medium
Summary
Electromagnetic (EM) wave scattering is a ubiquitous phenomenon in systems with refractive index contrast between an obstacle and the surrounding material [1]. Demonstrate control of EM wave interaction with plasmonic structures by engineering the effective optical constants in Au-Si multilayer HMMs. In contrast to strong plasmonic scattering from pure metallic structures, patterns of various sizes ranging from deep-subwavelength to wavelength scale in Au-Si multilayer HMMs become invisible in a manner that is not achievable with natural metallic or high-index materials. In contrast to strong plasmonic scattering from pure metallic structures, patterns of various sizes ranging from deep-subwavelength to wavelength scale in Au-Si multilayer HMMs become invisible in a manner that is not achievable with natural metallic or high-index materials Such anomalously weak scattering (AWS) from metamaterials comprised of conductive components is possible when the permittivity of the HMMs along the direction of the incident electric field impedance matches with the surrounding medium. This stealth functionality in HMMs may lead to potential applications in optical encryption, noninvasive conductive probe designs, and invisible optoelectric devices
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