English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/234335
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE
Exportar a otros formatos:


Properties of nanocrystalline silicon probed by optomechanics

AuthorsNavarro-Urrios, D. CSIC ORCID CVN; Colombano, Martin F. CSIC ORCID; Maire, Jeremie; Chávez, Emigdio CSIC ORCID; Arregui, Guillermo CSIC ORCID; Capuj, Nestor E.; Devos, Arnaud; Griol, Amadeu; Bellieres, Laurent; Martínez, Alejandro; Grigoras, Kestutis; Häkkinen, Teija; Saarilahti, Jaakko; Makkonen, Tapani; Sotomayor Torres, C. M. CSIC ORCID; Ahopelto, J.
Issue Date2020
PublisherWalter de Gruyter
CitationNanophotonics 9(16): 4819-4829 (2020)
AbstractNanocrystalline 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.
Publisher version (URL)https://doi.org/10.1515/nanoph-2020-0489
Appears in Collections:(CIN2) Artículos
Files in This Item:
File Description SizeFormat 
properopto.pdf3,36 MBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.