Tunable Resonant Narrow-Band Filter Based on Electro-optic Materials
type: Distribution
access URL: https://theses.hal.science/tel-00781178
format: HTML
issued: 2026-05-14T21:59:05.625945
modified: 2026-05-14T21:59:05.584020

test_moissonnage_selune
type: Agent

Tunable Resonant Narrow-Band Filter Based on Electro-optic Materials
type: Dataset
contact point: Organization
  fn: CCSD
keyword: effet-electro-optique
keyword: independance-polarisation
keyword: electro-optical-effect
keyword: tolerance-angulaire
keyword: diffraction-gratings
keyword: angular-tolerance
keyword: physphysphys-opticsphysics-physicsphysics-physicsoptics-physicsoptics
keyword: tunable-filter
keyword: reseaux-de-diffraction
keyword: polarization-independence
keyword: resonance-de-mode-guide
keyword: theses
keyword: guided-mode-resonance
keyword: infoeu-reposemanticsdoctoralthesis
keyword: filtre-accordable
landing page: https://theses.hal.science/tel-00781178
description: A resonant grating filter is a simple structure composed of a stack of a few dielectric layers on which a sub-wavelength grating is engraved. Their main interest is the narrow spectral FWHM they can achieve: in practice, quality factors greater than 7000 have already been obtained. The potential application fields are: optical telecommunications, spectroscopy, lasers, sensoring, etc. We aim to develop the potential of resonant grating filters by studying the tunability of their center wavelength by electro-optic effect. We chose two materials, Lithium Niobate and Barium Titanate, because of their large electrooptic coefficients. We developed a numerical tool based on the Fourier Modal Method including anisotropic materials. This is indispensable to analysis the effects related to the incident polarization. We compared several configurations, allowing a strong (up to 90nm) or weak tunability, independent or not versus the incident polarization. For each case, a physical interpretation is given for the facts that are observed. Last, we conclude by practical considerations concerning the feasibility of the structures and the influence of the absorption losses.
issued: 2026-05-14T21:59:05.622015
language: en
modified: 2026-05-14T21:59:05.622021