A circular waveguide transition is used to selectively excite Topologically Protected Helical Edge Modes along an interface between metallic Photonic Crystals. Reflection coefficient lower than -20dB is observed in a frequency range of 150MHz for a single port excitation and quasi-unitary transmission, mediated by the topological interface, is observed between two circular waveguide ports for the mid-band frequency
Efficient coupling between a Circular Waveguide and Topologically Protected Helical Modes in metallic Photonic Crystals / Gentili, G. G.; Pelosi, G.; Piccioli, F.; Selleri, S.. - ELETTRONICO. - (2018), pp. 316-318. (Intervento presentato al convegno 2018 12th International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials) tenutosi a Espoo (Finland) nel 27 August – 1 September 2018) [10.1109/MetaMaterials.2018.8534135].
Efficient coupling between a Circular Waveguide and Topologically Protected Helical Modes in metallic Photonic Crystals
Gentili, G. G.;Pelosi, G.;Selleri, S.
2018
Abstract
A circular waveguide transition is used to selectively excite Topologically Protected Helical Edge Modes along an interface between metallic Photonic Crystals. Reflection coefficient lower than -20dB is observed in a frequency range of 150MHz for a single port excitation and quasi-unitary transmission, mediated by the topological interface, is observed between two circular waveguide ports for the mid-band frequency
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