Název:
Calculations of nanocrystalline diamond-covered waveguides based on amorphous silicon
Autoři:
Jirásek, Vít ; Prajzler, Václav ; Remeš, Zdeněk Typ dokumentu: Příspěvky z konference Konference/Akce: NANOCON 2015. International Conference /7./, Brno (CZ), 20151014
Rok:
2015
Jazyk:
eng
Abstrakt: Nanocrystalline diamond (NCD) coatings on planar waveguides (WG) in the IR region allow to design optical sensors sensitive to absorbers like proteins or other biomolecules. In this contribution, we present a 2D model of a multi-layer WG developed under FEM (finite element method) simulation software Comsol Multiphysics. The model is based on the modified wave equation solved in the frequency domain and includes optical absorption. It was found that for the single-mode WG working in the narrow region of 1550-2000 nm the silicon thickness must be 150-320 nm. It was found that in order to keep a reasonable signal attenuation, the NCD film must be prepared with the optical absorption coefficient lower than 10 cm-1, being a rather challenging task. Dependencies of the signal attenuation on the NCD film thickness, absorbing layer height, its absorption coefficient and exciting wavelengths are presented.\n
Klíčová slova:
amorphous silicon; FEM simulations; nanocrystalline diamond; optical waveguides Číslo projektu: GA14-05053S (CEP) Poskytovatel projektu: GA ČR Zdrojový dokument: NANOCON 2015 Conference Proceedings, ISBN 978-80-87294-59-8
Instituce: Fyzikální ústav AV ČR
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Informace o dostupnosti dokumentu:
Dokument je dostupný v příslušném ústavu Akademie věd ČR. Původní záznam: http://hdl.handle.net/11104/0268903