Exciton-Polariton Topological Insulator with an Array of Magnetic Dots

M. Sun; D. Ko; D. Leykam; V. M. Kovalev; I. G. Savenko

doi:10.1103/PhysRevApplied.12.064028

Exciton-Polariton Topological Insulator with an Array of Magnetic Dots

M. Sun, D. Ko, D. Leykam, V. M. Kovalev, I. G. Savenko^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Recently, there have been several proposals on exciton-polariton topological insulators, most of which have required strong external magnetic fields induced by bulky superconducting coils. We propose an alternative design for a polariton topological insulator, where excitons are in the proximity of an additional layer of a ferromagnetic material, with a predefined magnetic moment located between the pillars of the cavity. Our design supports a variety of topological phases and transitions between Chern numbers ±2 and ±1 by varying either the magnetic moment of the ferromagnetic material or the spin-orbit coupling between different spin projections, thus enabling compact polariton devices harnessing switchable topological edge modes.

Original language	English
Article number	064028
Journal	Physical Review Applied
Volume	12
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevApplied.12.064028
State	Published - 11 Dec 2019
Externally published	Yes

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10.1103/PhysRevApplied.12.064028

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abstract = "Recently, there have been several proposals on exciton-polariton topological insulators, most of which have required strong external magnetic fields induced by bulky superconducting coils. We propose an alternative design for a polariton topological insulator, where excitons are in the proximity of an additional layer of a ferromagnetic material, with a predefined magnetic moment located between the pillars of the cavity. Our design supports a variety of topological phases and transitions between Chern numbers ±2 and ±1 by varying either the magnetic moment of the ferromagnetic material or the spin-orbit coupling between different spin projections, thus enabling compact polariton devices harnessing switchable topological edge modes.",

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AB - Recently, there have been several proposals on exciton-polariton topological insulators, most of which have required strong external magnetic fields induced by bulky superconducting coils. We propose an alternative design for a polariton topological insulator, where excitons are in the proximity of an additional layer of a ferromagnetic material, with a predefined magnetic moment located between the pillars of the cavity. Our design supports a variety of topological phases and transitions between Chern numbers ±2 and ±1 by varying either the magnetic moment of the ferromagnetic material or the spin-orbit coupling between different spin projections, thus enabling compact polariton devices harnessing switchable topological edge modes.

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Exciton-Polariton Topological Insulator with an Array of Magnetic Dots

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