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Contrôle de l'émission spontanée de boîtes quantiques semiconductrices insérées dans des micro-structures à confinement optique originales  

Abstract : This study deals with the control of spontaneous emission, InAs quantum dot emitters, confined via original microstructures: GaAs photonic wires and micropillars with GaAs/AlAs Bragg mirrors. We present a higly efficient single-photon source based on a photonic wire. Correlation mesurements performed on a single quantum dot inserted in a photonic wire led to a pure and high broadband single-photon generation. The optimization of this geometry including an original mirror at the wire bottom and a taper at its top demonstrated a record efficiency of 70%. In addition, the systematic lifetime study of single quantum dots underlined the ability to observe a high inhibition of spontaneous emission in the leaky modes with this geometry. In the last part of this PhD Thesis, we show the laser effect in whispering gallery mode micropillars. Those modes have an almost stable behaviour in terms of wavelengh and a spectral narrowing maintained up to power corresponding to 7 times the laser threshold. This result confirms a better thermal stability of micropillars compared to microdisks, a geometry usually used to observe the whispering gallery modes.
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https://tel.archives-ouvertes.fr/tel-00592414
Contributor : Maela Bazin <>
Submitted on : Thursday, May 12, 2011 - 1:57:15 PM
Last modification on : Thursday, November 19, 2020 - 1:01:03 PM
Long-term archiving on: : Saturday, August 13, 2011 - 2:50:02 AM

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  • HAL Id : tel-00592414, version 1

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Maela Bazin. Contrôle de l'émission spontanée de boîtes quantiques semiconductrices insérées dans des micro-structures à confinement optique originales  . Matière Condensée [cond-mat]. Université de Grenoble, 2010. Français. ⟨tel-00592414⟩

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