Vertical Engineering for Large Brillouin ...
Type de document :
Compte-rendu et recension critique d'ouvrage
Titre :
Vertical Engineering for Large Brillouin Gain in Unreleased Silicon-Based Waveguides
Auteur(s) :
Mercadé, L. [Auteur]
Korovin, A.V. [Auteur]
Pennec, Yan [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Physique - IEMN [PHYSIQUE - IEMN]
Ahopelto, J. [Auteur]
Djafari-Rouhani, Bahram [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Physique - IEMN [PHYSIQUE - IEMN]
Martínez, A. [Auteur]
Korovin, A.V. [Auteur]
Pennec, Yan [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Physique - IEMN [PHYSIQUE - IEMN]
Ahopelto, J. [Auteur]
Djafari-Rouhani, Bahram [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Physique - IEMN [PHYSIQUE - IEMN]
Martínez, A. [Auteur]
Titre de la revue :
Physical Review Applied
Pagination :
034021
Éditeur :
American Physical Society
Date de publication :
2021
ISSN :
2331-7019
Mot(s)-clé(s) en anglais :
Acoustic resonators
Optical waveguides
Optomechanics
Silica
Silicon nitride
Acousto-optic interaction
Cryogenic temperatures
Gigahertz frequencies
High index waveguides
Mechanical robustness
Multiple applications
Photonic technologies
Specific properties
Substrates
Optical waveguides
Optomechanics
Silica
Silicon nitride
Acousto-optic interaction
Cryogenic temperatures
Gigahertz frequencies
High index waveguides
Mechanical robustness
Multiple applications
Photonic technologies
Specific properties
Substrates
Discipline(s) HAL :
Physique [physics]
Résumé en anglais : [en]
Strong acousto-optic interaction in high-index waveguides and cavities generally requires the releasing of the high-index core to avoid mechanical leakage into the underlying low-index substrate. This complicates fabrication, ...
Lire la suite >Strong acousto-optic interaction in high-index waveguides and cavities generally requires the releasing of the high-index core to avoid mechanical leakage into the underlying low-index substrate. This complicates fabrication, limits thermalization, reduces the mechanical robustness, and hinders large-area optomechanical devices on a single chip. Here, we overcome this limitation by employing vertical photonic-phononic engineering to drastically reduce mechanical leakage into the cladding by adding a pedestal with specific properties between the core and the cladding. We apply this concept to a silicon-based platform, due to the remarkable properties of silicon to enhance optomechanical interactions and the technological relevance of silicon devices in multiple applications. Specifically, the insertion of a thick silicon nitride layer between the silicon guiding core and the silica substrate contributes to reducing gigahertz-frequency phonon leakage while enabling large values of the Brillouin gain in an unreleased platform. We numerically obtain values of the Brillouin gain around 300(W m)-1 for different configurations, which could be further increased by operation at cryogenic temperatures. These values should enable Brillouin-related phenomena in centimeter-scale waveguides or in more compact ring resonators. Our findings could pave the way toward large-area unreleased-cavity and waveguide optomechanics on silicon and other high-index photonic technologies. © 2021 American Physical Society.Lire moins >
Lire la suite >Strong acousto-optic interaction in high-index waveguides and cavities generally requires the releasing of the high-index core to avoid mechanical leakage into the underlying low-index substrate. This complicates fabrication, limits thermalization, reduces the mechanical robustness, and hinders large-area optomechanical devices on a single chip. Here, we overcome this limitation by employing vertical photonic-phononic engineering to drastically reduce mechanical leakage into the cladding by adding a pedestal with specific properties between the core and the cladding. We apply this concept to a silicon-based platform, due to the remarkable properties of silicon to enhance optomechanical interactions and the technological relevance of silicon devices in multiple applications. Specifically, the insertion of a thick silicon nitride layer between the silicon guiding core and the silica substrate contributes to reducing gigahertz-frequency phonon leakage while enabling large values of the Brillouin gain in an unreleased platform. We numerically obtain values of the Brillouin gain around 300(W m)-1 for different configurations, which could be further increased by operation at cryogenic temperatures. These values should enable Brillouin-related phenomena in centimeter-scale waveguides or in more compact ring resonators. Our findings could pave the way toward large-area unreleased-cavity and waveguide optomechanics on silicon and other high-index photonic technologies. © 2021 American Physical Society.Lire moins >
Langue :
Anglais
Vulgarisation :
Non
Projet Européen :
Source :
Fichiers
- http://arxiv.org/pdf/2011.02186
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- https://hal.archives-ouvertes.fr/hal-03542158/document
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- https://hal.archives-ouvertes.fr/hal-03542158/document
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- document
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- Mercad%C3%A9_2021_PhysRevApplied.15.034021.pdf
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- 2011.02186
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