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Theses
MODELISATION D'EFFETS NON LINEAIRES DANS LES CRISTAUX PHOTONIQUES, APPLICATION A LA LIMITATION OPTIQUE
MODELISATION D'EFFETS NON LINEAIRES DANS LES CRISTAUX PHOTONIQUES, APPLICATION A LA LIMITATION OPTIQUE
Abstract : We present here a discussion about the use of optical nonlinear material in photonic crystals (PCs) for optical limiting purpose. The link between cubic (Kerr) nonlinearities or phase transition and the complex diffraction phenomenon occurring inside a PC can allow ultra-fast and self-triggered switching from a transparent state towards an opaque one.
To study this, we developed new ab-initio numeric methods evolved from the Fast Fourier Factorization (FFF) and the Matrix Scattering Method (MSM). Those methods allow the rigorous simulation of nonlinear inhomogeneous inclusion and the thermal behaviour of a CP while illuminated by a nanosecond laser pulse.
In the last part of this document, the precision of the “homogeneous approximation” will be discussed and partially questioned. Finally, a CP based optical limiter solution is proposed.
To study this, we developed new ab-initio numeric methods evolved from the Fast Fourier Factorization (FFF) and the Matrix Scattering Method (MSM). Those methods allow the rigorous simulation of nonlinear inhomogeneous inclusion and the thermal behaviour of a CP while illuminated by a nanosecond laser pulse.
In the last part of this document, the precision of the “homogeneous approximation” will be discussed and partially questioned. Finally, a CP based optical limiter solution is proposed.
Keywords :
Photonic crystal
Kerr Effect
Cited literature [92 references]
https://tel.archives-ouvertes.fr/tel-00260364
Contributor : Jean-Jacques Bonnefois <>
Submitted on : Tuesday, March 4, 2008 - 10:00:17 AM
Last modification on : Tuesday, November 19, 2019 - 10:06:47 AM
Long-term archiving on: : Thursday, May 20, 2010 - 7:27:37 PM
Contributor : Jean-Jacques Bonnefois <>
Submitted on : Tuesday, March 4, 2008 - 10:00:17 AM
Last modification on : Tuesday, November 19, 2019 - 10:06:47 AM
Long-term archiving on: : Thursday, May 20, 2010 - 7:27:37 PM