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Strong light-matter coupling in microcavities characterised by Rabi-splittings comparable to the Bragg stop-band widths

Strong light-matter coupling in microcavities characterised by Rabi-splittings comparable to the Bragg stop-band widths
Strong light-matter coupling in microcavities characterised by Rabi-splittings comparable to the Bragg stop-band widths
The vacuum Rabi splitting of polaritonic eigenmodes in semiconductor microcavities scales with the square root of the oscillator strength, as predicted by the coupled oscillator model and confirmed in many experiments. We show here that the square root law is no more applicable if the Rabi splitting becomes comparable or larger than the stop-band width of the Bragg mirrors forming the cavity. Once the oscillator strength becomes large enough, the material hosting excitons hybridises with the quasi-continuum microcavity Bragg modes lying outside of the stop-band, thus forming a novel kind of polaritonic resonance. We study this physics considering both two- and three-dimensional excitonic materials embedded in the microcavity. We highlight the varied phenomenology of those polaritons and develop a theoretical understanding of their most peculiar features.
Optical Rabi splitting, Organic microcavity, Strong light-matter coupling
1367-2630
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
Kavokin, Alexey
70ffda66-cfab-4365-b2db-c15e4fa1116b
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
Kavokin, Alexey
70ffda66-cfab-4365-b2db-c15e4fa1116b

De Liberato, Simone and Kavokin, Alexey (2021) Strong light-matter coupling in microcavities characterised by Rabi-splittings comparable to the Bragg stop-band widths. New Journal of Physics, 23 (11), [113015]. (doi:10.1088/1367-2630/ac3260). (In Press)

Record type: Article

Abstract

The vacuum Rabi splitting of polaritonic eigenmodes in semiconductor microcavities scales with the square root of the oscillator strength, as predicted by the coupled oscillator model and confirmed in many experiments. We show here that the square root law is no more applicable if the Rabi splitting becomes comparable or larger than the stop-band width of the Bragg mirrors forming the cavity. Once the oscillator strength becomes large enough, the material hosting excitons hybridises with the quasi-continuum microcavity Bragg modes lying outside of the stop-band, thus forming a novel kind of polaritonic resonance. We study this physics considering both two- and three-dimensional excitonic materials embedded in the microcavity. We highlight the varied phenomenology of those polaritons and develop a theoretical understanding of their most peculiar features.

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More information

Accepted/In Press date: 19 October 2021
Keywords: Optical Rabi splitting, Organic microcavity, Strong light-matter coupling

Identifiers

Local EPrints ID: 452027
URI: http://eprints.soton.ac.uk/id/eprint/452027
ISSN: 1367-2630
PURE UUID: 2d561c4a-ceba-4079-9bf1-f2e29084a6eb
ORCID for Simone De Liberato: ORCID iD orcid.org/0000-0002-4851-2633

Catalogue record

Date deposited: 09 Nov 2021 17:30
Last modified: 03 Dec 2021 02:46

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