Microcavités non linéaires en régime d’excitation cohérente

Jérémy Oden 1
1 Laboratoire Charles Fabry / Manolia
LCF - Laboratoire Charles Fabry
Abstract : High quality factor and small modal volume microcavities allow, thanks to a strong light confinement, an enhancement of light matter interactions and the realization of low energy consumption devices for optical signal processing.In this work, we study the coherent excitation of nonlinear photonic crystal resonators, which is achieved by controlling the pulse time-Frequency relation, enabling nonlinear interaction enhancement.A modeling of the intra-Cavity nonlinear dynamics is conducted using the coupled mode theory, underlying the nonlinear refractive effects contribution in the intra-Cavity pulse energy reduction and distortion.We show that an appropriate pulse time-Frequency relation allow to compensate for the cavity resonance frequency shift, and to maintain the benefit of light localization during the entire excitation.The pulse shaper, made of a pulse-Stretcher combined with a spectral filter, has been specifically designed.Preliminary nonlinear characterizations of silicon nanowires enable to determine the shaped pulses parameters.A very first experimental coherent excitation of an optical resonator is reported, leading to a nonlinear interaction enhancement, and to the control of both the optical bandwidth and nonlinear dynamics of the cavity.
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Jérémy Oden. Microcavités non linéaires en régime d’excitation cohérente. Optique [physics.optics]. Institut d’Optique Graduate School, 2013. Français. ⟨NNT : 2013IOTA0005⟩. ⟨tel-01124185⟩

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