How much topological insulation does one need? how much can one get?

Akhlesh Lakhtakia, Tom G. Mackay, Francesco Chiadini, Annunziata Diovisalvi, Vincenzo Fiumara, Antonio Scaglione

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Topological insulators (TIs) have taken electromagnetic-engineering research by a storm this decade, and numerous theoretical papers have been published after modeling a TI as a nonreciprocal biisotropic material. As the TI phenomenon macroscopically is manifested only at boundaries, the assumed nonreciprocity in the bulk is fallacious. The TI phenomenon is better accommodated as a boundary condition indicating the presence of conducting states of a specific type. Theory shows that the TI effects in the free space surrounding a region occupied by a TI material do not depend on the specific model chosen. We have collectively examined frequency-domain scattering by planar surfaces, TI-coated gratings, and spheres in order to answer the first question in the title of this presentation. Our answer is: a lot. Based on a review of experimental data available on a variety of chalcogenide TIs, our answer to the second question in the title of this presentation is: much less.

Original languageEnglish (US)
Title of host publicationProceedings of the 2017 19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages729-732
Number of pages4
ISBN (Electronic)9781509044511
DOIs
StatePublished - Oct 11 2017
Event19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017 - Verona, Italy
Duration: Sep 11 2017Sep 15 2017

Publication series

NameProceedings of the 2017 19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017

Other

Other19th International Conference on Electromagnetics in Advanced Applications, ICEAA 2017
CountryItaly
CityVerona
Period9/11/179/15/17

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Instrumentation
  • Radiation

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