Original title: Calculations of nanocrystalline diamond-covered waveguides based on amorphous silicon
Authors: Jirásek, Vít ; Prajzler, Václav ; Remeš, Zdeněk
Document type: Papers
Conference/Event: NANOCON 2015. International Conference /7./, Brno (CZ), 20151014
Year: 2015
Language: eng
Abstract: 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
Keywords: amorphous silicon; FEM simulations; nanocrystalline diamond; optical waveguides
Project no.: GA14-05053S (CEP)
Funding provider: GA ČR
Host item entry: NANOCON 2015 Conference Proceedings, ISBN 978-80-87294-59-8

Institution: Institute of Physics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0268903

Permalink: http://www.nusl.cz/ntk/nusl-263329


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Research > Institutes ASCR > Institute of Physics
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