Slow light in two dimensional semi-conductor photonic crystals
type: Dataset
description: We report on the combination of slow light propagation with the resonance properties of a photonic crystal (PhC) cavity and with the slow mode of a PhC waveguide. We demonstrate theoretically and experimentally that slow light induced by the Coherent Population Oscillation (CPO) effect enables to have small-size and ultrahigh quality (Q) factor cavity, regardless of the technological and design issues. The experimental proof is performed in a L3 2D PhC cavity with semiconductor quantum wells as active, medium in which the CPO effect is induced. We achieve a cavity Q-factor of 520000, which corresponds to an enhancement by a factor 138 in comparison with the original Q-factor of the cavity. We present a theoretical approach to the combination of CPO-based slow light and slow mode in PhC waveguides, showing that the total group index is a multiplication of the group indices associated respectively to the CPO slow light and to the waveguide slow mode. We also set the basis for the experimental demonstration by designing and fabricating samples in the clean room facilities of LPN and addressing the challenging issue of coupling and extracting light in and from the waveguides. A particular design of the PhC in the waveguide is issued as a grating that allows to couple light perpendicularly to the plane of the PhC from free space. The vertical coupler has also been designed and fabricated along the waveguide and has been experimentally characterized. Slow light based on CPO effect in the PhC waveguides is always under experimental investigation.
identifier: NNT: 2012PA112316
issued: 2026-05-10T20:17:08.209162
language: en
modified: 2026-05-10T20:17:08.209167
contact point: Organization
  fn: CCSD
keyword: cavite
keyword: cavity
keyword: coherent-population-oscillations
keyword: cristaux-photoniques
keyword: guide-dondes
keyword: infoeu-reposemanticsdoctoralthesis
keyword: lumiere-lente
keyword: oscillations-coherentes-des-populations
keyword: photonic-crystals
keyword: physcondcm-genphysics-physicscondensed-matter-cond-matother-cond-matother
keyword: slow-light
keyword: theses
keyword: waveguide
landing page: https://theses.hal.science/tel-00830962

Slow light in two dimensional semi-conductor photonic crystals
type: Distribution
format: HTML
issued: 2026-05-10T20:17:08.211392
modified: 2026-05-10T20:17:08.189115
access URL: https://theses.hal.science/tel-00830962

test_moissonnage_selune
type: Agent