Materials Map

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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in Cooperation with on an Cooperation-Score of 37%

Topics

Publications (3/3 displayed)

  • 2018Coupled-mode analysis of vertically-coupled AlGaAs/AlOx microdisk resonators1citations
  • 2017Coupled mode analysis of micro-disk resonators with an asymmetric- index-profile coupling regioncitations
  • 2016III-V-semiconductor vertically-coupled whispering-gallery mode resonators made by selective lateral oxidationcitations

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Lafleur, Gael
2 / 8 shared
Gauthier-Lafaye, Olivier
3 / 9 shared
Larrue, Alexandre
2 / 5 shared
Arnoult, Alexandre
2 / 21 shared
Calvez, Stéphane
3 / 18 shared
Almuneau, Guilhem
3 / 23 shared
Calmon, Pierre-François
2 / 6 shared
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2018
2017
2016

Co-Authors (by relevance)

  • Lafleur, Gael
  • Gauthier-Lafaye, Olivier
  • Larrue, Alexandre
  • Arnoult, Alexandre
  • Calvez, Stéphane
  • Almuneau, Guilhem
  • Calmon, Pierre-François
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article

Coupled-mode analysis of vertically-coupled AlGaAs/AlOx microdisk resonators

  • Lafleur, Gael
  • Gauthier-Lafaye, Olivier
  • Larrue, Alexandre
  • Arnoult, Alexandre
  • Calvez, Stéphane
  • Almuneau, Guilhem
  • Calmon, Pierre-François
  • Arlotti, Clément
Abstract

This article reports the experimental and theoretical assessments of the optical characteristics of recently-introduced vertically-coupled microdisk resonators made by selective oxidation of AlGaAs multilayer structures. Experimental measurements show that the Q-factors are in the 10 3 to 10 4 range for diameters ranging from 75 to 300 µm. To establish the origins of this limited performance a coupled-mode-theory-based model of the single-access-waveguide-coupled resonator system was developed. It includes features which are specific to oxide-based vertically-coupled resonators, namely losses towards the slab waveguide lying under the resonator and a coupling region with an asymmetric and multilayer structure. Setting this simulation tool required the proposal and validation of a general criterion to select an appropriate set of decomposition permittivity profiles to be able to accurately model the characteristics of these more complex couplers using the coupled-mode-theory approach. This theoretical development is generic and can be now deployed to simulate any device which includes multi-waveguide couplers with arbitrary piece-wise-constant profile of the dielectric permittivity. Exploiting this particular development and experimental measurements of the disk sidewall roughness and of the coupling lengths, the calculated and experimental Q-factors are found to be in good agreement and allow establishing that the current performance is limited by the scattering losses and the slab-leakage losses for small-and large-diameter devices respectively.

Topics
  • impedance spectroscopy
  • theory
  • simulation
  • decomposition