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Effets résonants et cohérents dans un cristal dopé aux ions erbium : oscillations cohérentes de population et transparence induite électromagnétiquement

Abstract : Resonant optical excitation of an atomic system results in an enhanced non linear response and allows to control light with light even with low optical powers. Moreover some coherent light- matter interactions can reduce or destroy the important absorption of the laser beams at resonance. Two of these coherent and resonant interactions are studied in this thesis, coherent population oscillations (CPO) and electromagnetically induced transparency (EIT), using a Y2SiO5 (YSO) crystal lattice doped with isotopically pure erbium 167.

CPO occurs in a two level system excited by a modulated intensity leading to a population beat. In this work, CPO is used to demonstrate ultra-slow light propagation down to 3m/s in Er:YSO. Inhomogeneous broadening is specifically addressed in order to tuned both slowing down and transmission around 1.536 micron.

EIT is obtained in a 3-level lambda-like atomic system, when excited on each leg by 2 coherent fields. The hyperfine structure of 167-erbium ions in this low symmetry crystal lattice is studied by electron spin resonance spectroscopy and optical hole-burning spectroscopy in order to identify several lambda systems. In a dedicated experimental setup a sideband of a fast-amplitude modulation is filtered out in order to create the second coherent field. EIT is demonstrated for the first time in an erbium doped solid at 1.536 micron
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https://tel.archives-ouvertes.fr/tel-00335251
Contributor : Elisa Baldit <>
Submitted on : Tuesday, October 28, 2008 - 10:38:39 PM
Last modification on : Monday, October 19, 2020 - 10:57:39 AM
Long-term archiving on: : Monday, June 7, 2010 - 7:18:38 PM

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  • HAL Id : tel-00335251, version 1

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E. Baldit. Effets résonants et cohérents dans un cristal dopé aux ions erbium : oscillations cohérentes de population et transparence induite électromagnétiquement. Physique Atomique [physics.atom-ph]. Université Paris Sud - Paris XI, 2007. Français. ⟨tel-00335251⟩

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