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Proceedings Paper

Interface modes based on Zak phase for finite dielectric slabs (Conference Presentation)
Author(s): Shreya Singh; Dia'aaldin Bisharat; Dan Sievenpiper

Paper Abstract

The work delves into designing practical finite slab implementations of PTIs that are not constrained by the requirement of a complete bandgap. These structures are characterized by a topological ‘Zak Phase’ along one axis (transverse to propagation). The interface mode is established by means of a transverse impedance match of the bandgaps on either side of the interface. If the gap impedances on both sides match, field concentration at the interface is seen while the partial gap prevents coupling to bulk bands, reflections and leakage. The proposed structure is extremely practical as it has a narrow finite width that provides a 1-D waveguide with spin momentum locking and can easily be integrated into opto-electronic systems.

Paper Details

Date Published: 10 March 2020
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Proc. SPIE 11290, High Contrast Metastructures IX, 112900O (10 March 2020);
Show Author Affiliations
Shreya Singh, Univ. of California, San Diego (United States)
Dia'aaldin Bisharat, Univ. of California, San Diego (United States)
Dan Sievenpiper, Univ. of California, San Diego (United States)


Published in SPIE Proceedings Vol. 11290:
High Contrast Metastructures IX
Connie J. Chang-Hasnain; Andrei Faraon; Weimin Zhou, Editor(s)

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