Properties of nanocrystalline silicon ...
Type de document :
Compte-rendu et recension critique d'ouvrage
DOI :
Titre :
Properties of nanocrystalline silicon probed by optomechanics
Auteur(s) :
Navarro-Urrios, Daniel [Auteur]
Colombano, Martín [Auteur]
Maire, Jeremie [Auteur]
Chávez-Ángel, Emigdio [Auteur]
Arregui, Guillermo [Auteur]
Capuj, Néstor [Auteur]
Devos, Arnaud [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Physique - IEMN [PHYSIQUE - IEMN]
Griol, Amadeu [Auteur]
Bellieres, Laurent [Auteur]
Martínez, Alejandro [Auteur]
Grigoras, Kestutis [Auteur]
Häkkinen, Teija [Auteur]
Saarilahti, Jaakko [Auteur]
Makkonen, Tapani [Auteur]
Sotomayor-Torres, Clivia [Auteur]
Ahopelto, Jouni [Auteur]
Colombano, Martín [Auteur]
Maire, Jeremie [Auteur]
Chávez-Ángel, Emigdio [Auteur]
Arregui, Guillermo [Auteur]
Capuj, Néstor [Auteur]
Devos, Arnaud [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Physique - IEMN [PHYSIQUE - IEMN]
Griol, Amadeu [Auteur]
Bellieres, Laurent [Auteur]
Martínez, Alejandro [Auteur]
Grigoras, Kestutis [Auteur]
Häkkinen, Teija [Auteur]
Saarilahti, Jaakko [Auteur]
Makkonen, Tapani [Auteur]
Sotomayor-Torres, Clivia [Auteur]
Ahopelto, Jouni [Auteur]
Titre de la revue :
Nanophotonics
Pagination :
4819-4829
Éditeur :
De Gruyter
Date de publication :
2020-10-15
ISSN :
2192-8614
Mot(s)-clé(s) en anglais :
annealing
cavity optomechanics
nanocrystalline silicon
cavity optomechanics
nanocrystalline silicon
Discipline(s) HAL :
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Sciences de l'ingénieur [physics]
Sciences de l'ingénieur [physics]
Résumé en anglais : [en]
Nanocrystalline materials exhibit properties that can differ substantially from those of their single crystal counterparts. As such, they provide ways to enhance and optimize their functionality for devices and applications. ...
Lire la suite >Nanocrystalline materials exhibit properties that can differ substantially from those of their single crystal counterparts. As such, they provide ways to enhance and optimize their functionality for devices and applications. Here, we report on the optical, mechanical and thermal properties of nanocrystalline silicon probed by means of optomechanical nanobeams to extract information of the dynamics of optical absorption, mechanical losses, heat generation and dissipation. The optomechanical nanobeams are fabricated using nanocrystalline films prepared by annealing amorphous silicon layers at different temperatures. The resulting crystallite sizes and the stress in the films can be controlled by the annealing temperature and time and, consequently, the properties of the films can be tuned relatively freely, as demonstrated here by means of electron microscopy and Raman scattering. We show that the nanocrystallite size and the volume fraction of the grain boundaries play a key role in the dissipation rates through nonlinear optical and thermal processes. Promising optical (13,000) and mechanical (1700) quality factors were found in the optomechanical cavity realized in the nanocrystalline Si resulting from annealing at 950°C. The enhanced absorption and recombination rates via the intragap states and the reduced thermal conductivity boost the potential to exploit these nonlinear effects in applications including Nanoelectromechanical systems (NEMS), phonon lasing and chaos-based devices.Lire moins >
Lire la suite >Nanocrystalline materials exhibit properties that can differ substantially from those of their single crystal counterparts. As such, they provide ways to enhance and optimize their functionality for devices and applications. Here, we report on the optical, mechanical and thermal properties of nanocrystalline silicon probed by means of optomechanical nanobeams to extract information of the dynamics of optical absorption, mechanical losses, heat generation and dissipation. The optomechanical nanobeams are fabricated using nanocrystalline films prepared by annealing amorphous silicon layers at different temperatures. The resulting crystallite sizes and the stress in the films can be controlled by the annealing temperature and time and, consequently, the properties of the films can be tuned relatively freely, as demonstrated here by means of electron microscopy and Raman scattering. We show that the nanocrystallite size and the volume fraction of the grain boundaries play a key role in the dissipation rates through nonlinear optical and thermal processes. Promising optical (13,000) and mechanical (1700) quality factors were found in the optomechanical cavity realized in the nanocrystalline Si resulting from annealing at 950°C. The enhanced absorption and recombination rates via the intragap states and the reduced thermal conductivity boost the potential to exploit these nonlinear effects in applications including Nanoelectromechanical systems (NEMS), phonon lasing and chaos-based devices.Lire moins >
Langue :
Anglais
Vulgarisation :
Non
Projet Européen :
Source :
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