Left/right asymmetry of the dipole field due to reflection from a periodic multilayer of a topological insulator and a columnar thin film

Antonio Scaglione, Francesco Chiadini, Vincenzo Fiumara, Akhlesh Lakhtakia

Research output: Contribution to journalArticlepeer-review

Abstract

The problem of a vertical electric dipole radiating above a periodic multilayer whose unit cell comprises a layer of a topological insulator (TI) and a columnar thin film (CTF) was solved in order to investigate the left/right asymmetry of the total electric field in the far zone in the half-space containing the dipole. Occurring in a wide range of the polar observation angle, the left/right asymmetry of Eφ is due to both the CTFs and the TI layers. Occurring in a narrow range of the polar observation angle, the left/right asymmetry of Eθ is entirely due to the TI layers. For presently available values of the magnitude of the surface admittance γTI of TIs, significant left/right asymmetry occurs if the number of unit cells in the periodic TI/CTF multilayer is high enough.

Original languageEnglish (US)
Pages (from-to)22266-22275
Number of pages10
JournalOptics Express
Volume28
Issue number15
DOIs
StatePublished - Jul 20 2020

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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