Reducing dephasing in coupled quantum dot-cavity systems by engineering the carrier wavefunctions

Anders Nysteen; Per Kær Nielsen; Jesper Mørk

doi:10.1117/12.905594

Reducing dephasing in coupled quantum dot-cavity systems by engineering the carrier wavefunctions

Anders Nysteen, Per Kær Nielsen, Jesper Mørk

Research output: Contribution to journal › Conference article › Research › peer-review

Abstract

We demonstrate theoretically how photon-assisted dephasing by the electron-phonon interaction in a coupled cavity-quantum dot system can be significantly reduced for specific QD-cavity detunings. Our starting point is a recently published theory,1 which considers longitudinal acoustic phonons, described by a non-Markovian model, interacting with a coupled quantum dot-cavity system. The reduction of phonon-induced dephasing is obtained by placing the cavity-quantum dot system inside an infinite slab, assuming spherical electronic wavefunctions. Based on our calculations, we expect this to have important implications in single-photon sources, allowing the indistinguishability of the photons to be improved.

Original language	English
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	8271
Pages (from-to)	82710E
ISSN	0277-786X
DOIs	https://doi.org/10.1117/12.905594
Publication status	Published - 2012
Event	SPIE Photonics West OPTO 2012 - The Moscone Center, San Francisco, United States Duration: 21 Jan 2012 → 26 Jan 2012 http://spie.org/app/program/index.cfm?fuseaction=conferencedetail&conference_id=961561&event_id=896189&list=1

Conference

Conference	SPIE Photonics West OPTO 2012
Location	The Moscone Center
Country/Territory	United States
City	San Francisco
Period	21/01/2012 → 26/01/2012
Internet address	http://spie.org/app/program/index.cfm?fuseaction=conferencedetail&conference_id=961561&event_id=896189&list=1

Keywords

Cavity QED
Dephasing
Electron-phonon interaction
Acoustic phonon
Deformation potential

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title = "Reducing dephasing in coupled quantum dot-cavity systems by engineering the carrier wavefunctions",

abstract = "We demonstrate theoretically how photon-assisted dephasing by the electron-phonon interaction in a coupled cavity-quantum dot system can be significantly reduced for specific QD-cavity detunings. Our starting point is a recently published theory,1 which considers longitudinal acoustic phonons, described by a non-Markovian model, interacting with a coupled quantum dot-cavity system. The reduction of phonon-induced dephasing is obtained by placing the cavity-quantum dot system inside an infinite slab, assuming spherical electronic wavefunctions. Based on our calculations, we expect this to have important implications in single-photon sources, allowing the indistinguishability of the photons to be improved.",

keywords = "Cavity QED, Dephasing, Electron-phonon interaction, Acoustic phonon, Deformation potential",

author = "Anders Nysteen and Nielsen, {Per K{\ae}r} and Jesper M{\o}rk",

year = "2012",

doi = "10.1117/12.905594",

language = "English",

volume = "8271",

pages = "82710E",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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note = "SPIE Photonics West OPTO 2012 ; Conference date: 21-01-2012 Through 26-01-2012",

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AU - Nysteen, Anders

AU - Nielsen, Per Kær

AU - Mørk, Jesper

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N2 - We demonstrate theoretically how photon-assisted dephasing by the electron-phonon interaction in a coupled cavity-quantum dot system can be significantly reduced for specific QD-cavity detunings. Our starting point is a recently published theory,1 which considers longitudinal acoustic phonons, described by a non-Markovian model, interacting with a coupled quantum dot-cavity system. The reduction of phonon-induced dephasing is obtained by placing the cavity-quantum dot system inside an infinite slab, assuming spherical electronic wavefunctions. Based on our calculations, we expect this to have important implications in single-photon sources, allowing the indistinguishability of the photons to be improved.

AB - We demonstrate theoretically how photon-assisted dephasing by the electron-phonon interaction in a coupled cavity-quantum dot system can be significantly reduced for specific QD-cavity detunings. Our starting point is a recently published theory,1 which considers longitudinal acoustic phonons, described by a non-Markovian model, interacting with a coupled quantum dot-cavity system. The reduction of phonon-induced dephasing is obtained by placing the cavity-quantum dot system inside an infinite slab, assuming spherical electronic wavefunctions. Based on our calculations, we expect this to have important implications in single-photon sources, allowing the indistinguishability of the photons to be improved.

KW - Cavity QED

KW - Dephasing

KW - Electron-phonon interaction

KW - Acoustic phonon

KW - Deformation potential

U2 - 10.1117/12.905594

DO - 10.1117/12.905594

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SP - 82710E

JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

T2 - SPIE Photonics West OPTO 2012

Y2 - 21 January 2012 through 26 January 2012

ER -

Reducing dephasing in coupled quantum dot-cavity systems by engineering the carrier wavefunctions

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