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Etude des propriétés optiques de boîtes quantiques semiconductrices II-VI pour leur application à l'émission à un photon à haute température

Abstract : We studied the optical properties of single CdSe and CdTe quantum dots with the objective of using them as sources that can emit single photons at high temperatures (beyond 100 K). So we characterised the origins of dephasing (random charge fluctuations, exciton-phonon interaction) that limit the emission of indistinguishable photons. The study of our charged CdSe dots allows to show the importance of the mixing between heavy holes and light holes that limits the usage of the dots as sources of pairs of entangled photons. Moreover, we studied two inter-dot transfer mechanisms that affect the emission of single photons on demand: the transfer by tunnelling, occurring at high dot densities, and the thermoactivated transfer that appears at low carrier confinements. Finally, the proof of single photon emission is furnished by means of photon correlation experiments with a continuous wave excitation.
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https://tel.archives-ouvertes.fr/tel-00010332
Contributor : Sebastian Moehl <>
Submitted on : Thursday, September 29, 2005 - 3:16:17 PM
Last modification on : Thursday, June 4, 2020 - 4:32:14 PM
Long-term archiving on: : Friday, April 2, 2010 - 10:47:25 PM

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  • HAL Id : tel-00010332, version 1

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Sebastian Moehl. Etude des propriétés optiques de boîtes quantiques semiconductrices II-VI pour leur application à l'émission à un photon à haute température. Physique Atomique [physics.atom-ph]. Université Joseph-Fourier - Grenoble I, 2005. Français. ⟨tel-00010332⟩

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