Monitoring of Orientation in Molecular Ensembles by Polarization Sensitive Nonlinear Microscopy

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dc.creatorFloc'h, Veronique Le
dc.creatorBrasselet, Sophie
dc.creatorRoch, Jean-Francois
dc.creatorZyss, Joseph
dc.date2003-07-29
dc.date.accessioned2026-07-07T02:52:39Z
dc.date.available2026-07-07T02:52:39Z
dc.descriptionWe present high resolution two-photon excitation microscopy studies combining two-photon fluorescence (TPF) and second harmonic generation (SHG) in order to probe orientational distributions of molecular ensembles at room temperature. A detailed polarization analysis of TPF and SHG signals is used in order to unravel the parameters of the molecular orientational statistical distribution, using a technique which can be extended and generalized to a broad variety of molecular arrangements. A polymer film containing molecules active for TPF and/or SHG emission is studied as a model system. Polarized TPF is shown to provide information on specific properties pertaining to incoherent emission in molecular media, such as excitation transfer. SHG, being highly sensitive to a slight departure from centrosymmetry such as induced by an external electric field in the medium, complements TPF. The response of each signal to a variable excitation polarization allows investigation of molecular behavior in complex environments which affect their orientations and interactions.
dc.descriptionsubmitted April 9th, 2003 to J. Phys. Chem. B
dc.identifierhttps://arxiv.org/abs/cond-mat/0307708
dc.identifierhttp://arxiv.org/abs/cond-mat/0307708
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/21920
dc.subjectSoft Condensed Matter
dc.subjectMaterials Science
dc.titleMonitoring of Orientation in Molecular Ensembles by Polarization Sensitive Nonlinear Microscopy
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