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Active plasmonic devices and optical metamaterials [PDF]
, 2009 We studied active near-infrared metamaterials based on phase transition of vanadium oxide thin films, asymmetrically coupled split-ring resonators for narrowing resonance line-widths , field effect modulation of plasmon propagation and 3D single layer ...
Atwater, Harry A. +8 more
core +1 more source
Superconducting metamaterials [PDF]
Applied Physics Letters, 2005 Evanescent wave amplification has been predicted under the ideal condition that the index of refraction, n=−1+i0 precisely, but is difficult to observe in practice because current metamaterials suffer from high losses. We present experimental results on a metamaterial that employs superconducting Nb metals and low-loss dielectric materials.
Ricci, Michael +2 more
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Beyond local effective material properties for metamaterials [PDF]
, 2017 To discuss the properties of metamaterials on physical grounds and to consider them in applications, effective material parameters are usually introduced and assigned to a given metamaterial. In most cases, only weak spatial dispersion is considered.
Khrabustovskyi, Andrii +4 more
core +3 more sources
SIMULATIONS OF THE PROPERTIES OF ELONGATED HEXAGONAL DODECAHEDRON SYSTEMS
TASK Quarterly, 2014 This study considers a 3D basic unit-cell proposed for auxetic and non-auxetic foams namely the elongated hexagonal dodecahedron deforming through changes in angle between its ligaments (idealised hinging model). This structure was studied in detail for
JOSEPH N. GRIMA +3 more
doaj +1 more source
Adaptive Multichannel Terahertz Communication by Space-Time Shared Aperture Metasurfaces
IEEE Access, 2020 We propose a technique for adaptive multichannel communication in the low-terahertz frequency regime through simultaneous and independent multifrequency multibeam scanning via a single time-modulated metasurface consisting of graphene micro-patch ...
Hooman Barati Sedeh +2 more
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Optical nonreciprocity via transmissive time-modulated metasurfaces
Nanophotonics, 2022 The frequency mixing property of time-modulated metasurfaces, attributed to the well-known phenomenon of temporal photonic transition, has led to several exotic functionalities in the last lustrum. Based on this concept, we demonstrate the possibility of
Barati Sedeh Hooman +2 more
doaj +1 more source
Transformation-Invariant Metamaterials [PDF]
Physical Review Letters, 2019 The fundamental semiconductor concept of doping has recently been transplanted to photonics in the platform of epsilon-near-zero (ENZ) media. By doping nonmagnetic impurities, ENZ media can exhibit almost arbitrary magnetism. However, this original photonic doping approach results only in isotropic media and thus cannot achieve impedance matching for ...
Youming Zhang +3 more
openaire +3 more sources
Up Scalable Full Colour Plasmonic Pixels with Controllable Hue, Brightness and Saturation
Scientific Reports, 2017 It has long been the interests of scientists to develop ink free colour printing technique using nano structured materials inspired by brilliant colours found in many creatures like butterflies and peacocks.
Renilkumar Mudachathi, Takuo Tanaka
doaj +1 more source
Two-dimensional control of light with light on metasurfaces
Light: Science & Applications, 2016 The ability to control the wavefront of light is fundamental to focusing and redistribution of light, enabling many applications from imaging to spectroscopy.
Maria Papaioannou +4 more
doaj +1 more source
Optica, 2020 We report the theoretical prediction and experimental realization of the optical phenomenon of “ballistic resonance.” This resonance, resulting from the interplay between free charge motion in confining geometries and periodic driving electromagnetic fields, can be utilized to achieve negative permittivity at frequencies well above the bulk plasma ...
Kun Li +6 more
openaire +2 more sources