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Other literature type . 2004
Hal-Diderot
Doctoral thesis . 2004
Data sources: Hal-Diderot
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Optical steering and monitoring of the organization of nonlinear and luminescent chromophores

Authors: Bidault, Sébastien;

Optical steering and monitoring of the organization of nonlinear and luminescent chromophores

Abstract

Nous avons utilisé une technique d'orientation tout-optique pour manipuler l'organisation de chromophores non-linéaires et luminescents dans des couches minces polymères par interférence de chemins d'absorption multiphotoniques. Cette procédure holographique nous a permis d'inscrire localement des anisotropies de non-linéarité et de luminescence prédéterminées dans des matériaux organiques en contrôlant l'état de polarisation des champs incidents. La symétrie et la dynamique des ordres orientationnels pairs et impairs ont été étudiées théoriquement et expérimentalement en utilisant un formalisme sphérique irréductible appliqué aux susceptibilités moléculaires et aux tenseurs champs. Des processus de transfert d'excitation entre chromophores voisins ont été démontrés et discutés. Les réponses en polarisation des signaux non-linéaires générés par des ensembles orientés d'octupôles ont été analysées en utilisant un modèle analytique du type valence bond-charge transfer décrivant les polarisabilités moléculaires. Ce travail ouvre des pers-pectives intéressantes pour le stockage holographique non-linéaire de l'information optique qui est démontré ici à l'échelle du micromètre.

Polymer thin films doped with nonlinear and luminescent chromophores were poled by an all-optical process based on the interference of multiphoton absorption pathways. This holographic technique enabled us to imprint locally controlled nonlinear and luminescence anisotropies in organic materials by governing the photoinduced molecular distribution through the polarization state of the exciting laser beams. The symmetry and the dynamics of the odd and even order parameters of the induced distribution were studied theoretically and experimentally using an irreducible spherical tensor-based formalism jointly applied to the molecular polarizabilities and field tensors. Excitation transfer processes between neighboring molecules were demonstrated and analyzed. The nonlinear polarization responses of poled assemblies of octupolar organometallic molecules were discussed using a valence bond-charge transfer model describing the molecular polarisability tensors. This research leads to interesting perspectives in the field of nonlinear holographic storage, which is experimentally demonstrated at the microscopic scale in this work.

Country
France
Related Organizations
Keywords

two-photon fluorescence, ONL quadratique, analytical models of molecular susceptibilities, [PHYS.PHYS.PHYS-ATOM-PH]Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph], [PHYS.PHYS]Physics [physics]/Physics [physics], orientation tout-optique, décomposition sphérique, Quadratic NLO, all-optical poling, holographie non-linéaire, organic materials, octupôles, nonlinear holography, matériaux organiques, fluorescence à deux photons, spherical decomposition, modèle analytique des susceptibilités moléculaires, [PHYS.PHYS] Physics [physics]/Physics [physics], [PHYS.PHYS.PHYS-ATOM-PH] Physics [physics]/Physics [physics]/Atomic Physics [physics.atom-ph]

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Funded by
NIH| MORPHOLOGY &CONNECTIONS OF THE COCHLEAR SPIRAL GANGLION
Project
  • Funder: National Institutes of Health (NIH)
  • Project Code: 3R01DC000160-16S1
  • Funding stream: NATIONAL INSTITUTE ON DEAFNESS AND OTHER COMMUNICATION DISORDERS
,
NIH| CESAREAN CHILDBIRTH RATES IN THE U.S.
Project
  • Funder: National Institutes of Health (NIH)
  • Project Code: 1Z01HD000341-02
  • Funding stream: EUNICE KENNEDY SHRIVER NATIONAL INSTITUTE OF CHILD HEALTH &HUMAN DEVELOPMENT
iis
,
NIH| Optical Imaging of Dynamic 3-D Engineered Tissues
Project
  • Funder: National Institutes of Health (NIH)
  • Project Code: 1R01EB000108-01
  • Funding stream: NATIONAL INSTITUTE OF BIOMEDICAL IMAGING AND BIOENGINEERING
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