4.8 Article

Hybrid Semimagnetic Polaritons in a Strongly Coupled Optical Microcavity

Journal

JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 12, Issue 31, Pages 7619-7624

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.1c01894

Keywords

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Funding

  1. Polish National Science Center [DEC-2013/10/E/ST3/00215]
  2. European Union

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Hybrid exciton-polaritons are demonstrated in a structure comprising semimagnetic and nonmagnetic quantum wells coupled via the microcavity optical mode, with the emerging states acquiring magnetic properties due to the susceptibility of excitons in the magnetic quantum well. External magnetic fields enable control over the degree of hybridization, tuning of the ratio of excitonic to photonic components, and alteration of energy transfer between excitonic states in magnetic and nonmagnetic quantum wells. The possibility of hybridizing a semimagnetic exciton with an exciton in a material lacking meaningful magnetic effects holds promise for systems with strong magnetooptical properties.
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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