Isotropic Backward Waves Supported by a Spiral Array Metasurface.
Tremain, B; Hooper, IR; Sambles, JR; et al.Hibbins, AP
Date: 8 May 2018
Journal
Scientific Reports
Publisher
Nature Publishing Group
Publisher DOI
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Abstract
A planar metallic metasurface formed of spiral elements is shown to support an isotropic backward wave over a narrow band of microwave frequencies. The magnetic field of this left-handed mode is mapped experimentally using a near-field scanning technique, allowing the anti-parallel group and phase velocities to be directly visualised. ...
A planar metallic metasurface formed of spiral elements is shown to support an isotropic backward wave over a narrow band of microwave frequencies. The magnetic field of this left-handed mode is mapped experimentally using a near-field scanning technique, allowing the anti-parallel group and phase velocities to be directly visualised. The corresponding dispersion relation and isofrequency contours are obtained through Fourier transformation of the field images.
Physics and Astronomy
Faculty of Environment, Science and Economy
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