Results 21 to 30 of about 38,934 (253)
Science, 2009 Tunable Metamaterials The electromagnetic response of metamaterials gives rise to exciting phenomena such as cloaking, negative refraction, and perfect lensing. Their response, however, tends to depend strongly on resonant effects, thereby limiting the application bandwidth. Driscoll et al.
Driscoll, Tom +9 more
openaire +3 more sources
Towards three-dimensional optical metamaterials
Nano Convergence, 2017 Metamaterials have opened up the possibility of unprecedented and fascinating concepts and applications in optics and photonics. Examples include negative refraction, perfect lenses, cloaking, perfect absorbers, and so on.
Takuo Tanaka, Atsushi Ishikawa
doaj +1 more source
Optics Letters, 2022 We study the dispersion of electromagnetic waves in a spatially dispersive metamaterial with Lorentz-like dependence of principal permittivity tensor components on the respective components of the wave vector performing the analysis of isofrequency contours. The considered permittivity tensor describes a triple non-connected wire medium.
D. Sakhno, E. Koreshin, P. Belov
openaire +3 more sources
Journal of Optics, 2010 Optical space in metamaterials may be engineered to mimic the landscape of a multidimensional Universe which has regions of different topology and different effective dimensionality. The "metamaterial landscape" may include regions in which one or two spatial dimensions are compactified.
openaire +2 more sources
Metamaterials and imaging [PDF]
Nano Convergence, 2015 Resolution of the conventional lens is limited to half the wavelength of the light source by diffraction. In the conventional optical system, evanescent waves, which carry sub-diffraction spatial information, has exponentially decaying amplitude and therefore cannot reach to the image plane.
Kim, Minkyung, Rho, Junsuk
openaire +2 more sources
CORE-SHELL MODELLING OF AUXETIC INORGANIC MATERIALS
TASK Quarterly, 2014 This paper investigates the suitability of the General Utility Lattice Program (GULP) for studying auxetic materials at the molecular level. GULP is a force-field based molecular modelling package which incorporates the ‘core-shell’ model for simulating
VICTOR ZAMMIT +3 more
doaj +1 more source
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
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
doaj +1 more source
Increasing the stability margins using multi-pattern metasails and multi-modal laser beams
Scientific Reports, 2022 Laser-driven metasails can enable reaching velocities far beyond the chemically propelled spacecrafts, which accounts for precise engineering of the acceleration and the stability degree of the lightsail across the Doppler-broadened band.
Mohammadrasoul Taghavi +1 more
doaj +1 more source