Strong coupling of ionizing transitions
Strong coupling of ionizing transitions
In cavity quantum electrodynamics, strong light–matter coupling is normally observed between a photon mode and a discrete optically active transition. In the present work we demonstrate that strong coupling can also be achieved using ionizing, intrinsically continuum, transitions. This leads to the appearance of novel discrete polaritonic resonances, corresponding to dressed bound exciton states, kept together by the exchange of virtual cavity photons. We apply our theory to the case of intersubband transitions in doped quantum wells, where Coulomb-bound excitons are absent. In considering quantum wells with a single bound electronic subband, in which all transitions involve states in the continuum, we find that the novel bound excitons predicted by our theory are observable within present-day, realistic parameters. Our work shows how strong light–matter coupling can be used as a novel gauge to tune both optical and electronic properties of semiconductor heterostructures beyond those permitted by mere crystal properties.
354-361
Cortese, Erika
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Carusotto, Iacopo
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Colombelli, Raffaele
cf9c88c0-6717-49ba-8f3e-57d1415b3b70
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
Cortese, Erika
1dd08835-71b4-4d4e-89ef-664f189718a2
Carusotto, Iacopo
5def2216-882e-44f1-9a32-74decec54b2b
Colombelli, Raffaele
cf9c88c0-6717-49ba-8f3e-57d1415b3b70
De Liberato, Simone
5942e45f-3115-4027-8653-a82667ed8473
Cortese, Erika, Carusotto, Iacopo, Colombelli, Raffaele and De Liberato, Simone
(2019)
Strong coupling of ionizing transitions.
Optica, 6 (3), .
(doi:10.1364/OPTICA.6.000354).
Abstract
In cavity quantum electrodynamics, strong light–matter coupling is normally observed between a photon mode and a discrete optically active transition. In the present work we demonstrate that strong coupling can also be achieved using ionizing, intrinsically continuum, transitions. This leads to the appearance of novel discrete polaritonic resonances, corresponding to dressed bound exciton states, kept together by the exchange of virtual cavity photons. We apply our theory to the case of intersubband transitions in doped quantum wells, where Coulomb-bound excitons are absent. In considering quantum wells with a single bound electronic subband, in which all transitions involve states in the continuum, we find that the novel bound excitons predicted by our theory are observable within present-day, realistic parameters. Our work shows how strong light–matter coupling can be used as a novel gauge to tune both optical and electronic properties of semiconductor heterostructures beyond those permitted by mere crystal properties.
Text
optica-6-3-354
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Accepted/In Press date: 24 January 2019
e-pub ahead of print date: 11 March 2019
Identifiers
Local EPrints ID: 428797
URI: http://eprints.soton.ac.uk/id/eprint/428797
ISSN: 2334-2536
PURE UUID: 8b74504f-8610-45f0-a8bb-c9388d80dd85
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Date deposited: 08 Mar 2019 17:30
Last modified: 16 Mar 2024 04:14
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Contributors
Author:
Erika Cortese
Author:
Iacopo Carusotto
Author:
Raffaele Colombelli
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