Hybrid Semimagnetic Polaritons in a Strongly Coupled Optical Microcavity.

Tomasz Fąs,Wojciech Pacuski,Andrzej Golnik,Jan Suffczyński,Maciej Ściesiek

doi:10.1021/acs.jpclett.1c01894

Tomasz Fąs, Wojciech Pacuski + Show 3 more

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Exciton–polaritons of a hybrid type, emerging in a structure comprising semimagnetic (Mn-doped) and nonmagnetic quantum wells coupled via the microcavity optical mode are demonstrated and studied. Thanks to the susceptibility of the excitons in the magnetic quantum well to the magnetic field, all the emerging hybrid polariton states acquire magnetic properties. In that way, external magnetic field enables control over the degree of hybridization, tuning of the ratio of the excitonic to photonic components of the hybrid polaritons, and alteration of the direction and dynamics of the energy transfer between the excitonic states in magnetic and nonmagnetic quantum wells. The presented possibility of the hybridization of a semimagnetic exciton with an exciton in a material that itself does not exhibit any meaningful magnetic effects is highly promising in the context of the fabrication of—to date lacking—organic, perovskite, or dichalcogenide-based systems with strong magnetooptical properties.

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Exciton−polaritons of a hybrid type, emerging in a structure comprising semimagnetic (Mn-doped) and nonmagnetic quantum wells coupled via the microcavity optical mode are demonstrated and studied
We demonstrate semimagnetic polaritons of a hybrid type, obtained thanks to the strong coupling of excitons confined in magnetic quantum wells (QWs) (MQW) with excitons in nonmagnetic QWs (NMQW) and an optical mode of a microcavity
The hybridization takes place over a distance of the order of 100 nm, which exceeds the range of tens of nanometers relevant for a dipolar polariton[28−30] or exciton quantum tunnelling regime.[31−33] Thanks to the optical-mode mediated coupling, the susceptibility of the excitons in the MQW to the magnetic field is extended over all hybrid polariton states arising in the structure

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Introduction

Exciton−polaritons of a hybrid type, emerging in a structure comprising semimagnetic (Mn-doped) and nonmagnetic quantum wells coupled via the microcavity optical mode are demonstrated and studied. We demonstrate semimagnetic polaritons of a hybrid type, obtained thanks to the strong coupling of excitons confined in magnetic QWs (MQW) with excitons in nonmagnetic QWs (NMQW) and an optical mode of a microcavity.

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