Nucleation and growth of CVD diamond on fused silica optical fibres with titanium dioxide interlayer

Robert Bogdanowicz; Mateusz Śmietana; Marcin Gnyba; Mateusz Ficek; VíTěZSLAV Stranak; Michał Gołuński; Michał Sobaszek; Jacek Ryl

doi:10.1002/pssa.201300096

Nucleation and growth of CVD diamond on fused silica optical fibres with titanium dioxide interlayer

Abstract

Nucleation and growth processes of thin diamond films on fused silica optical fibres have been investigated. Fibres were coated with diamond film using microwave plasma enhanced chemical vapour deposition (µPE CVD) system. Since the growth of diamond on the fused silica glass requires high seeding density, two types of glass pre-treatment were applied: titanium dioxide (TiO2) interlayer deposition and sonication in nanodiamond suspension. In the experiment, high density, thin (∼20 nm) TiO2 films were deposited using high-power impulse magnetron sputtering. Subsequently, a set of thin diamond films deposited in up to 60 min-long process was investigated. Results obtained for the two pre-treatment methods were compared. The nucleation processes were studied and compared using numerical analysis of scanning electron microscopy (SEM) images. The molecular structure of nucleated diamond was examined with micro-Raman spectroscopy. The sp3/sp2 ratio was calculated using Raman spectra deconvolution method. Thickness, roughness and optical properties of the nanodiamond films in VIS–NIR wavelength range were investigated by means of spectroscopic ellipsometry. It was found that the high density TiO2 interlayer enhances CVD diamond film nucleation processes on fused silica and increases sp3/sp2 ratio of the film. The proposed growth method can be effectively applied in manufacturing of various types of optical fibre sensors. Due to high chemical and mechanical resistance of the diamond films such optical sensors are highly desired.

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Authors (8)

Robert Bogdanowicz dr hab. inż.
Mateusz Śmietana
- Warsaw University of Technology Institute of Microelectronics and Optoelectronics
Marcin Gnyba dr hab. inż.
Mateusz Ficek dr inż.
VíTěZSLAV Stranak
- UNIVERSITY OF GREIFSWALD Institute of Physics
Michał Gołuński
Michał Sobaszek dr inż.
Jacek Ryl dr hab. inż.

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE no. 210, edition 10, pages 1991 - 1997,
ISSN: 1862-6300
Language:: English
Publication year:: 2013
Bibliographic description:: Bogdanowicz R., Śmietana M., Gnyba M., Ficek M., Stranak V., Gołuński M., Sobaszek M., Ryl J.: Nucleation and growth of CVD diamond on fused silica optical fibres with titanium dioxide interlayer// PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE. -Vol. 210, iss. 10 (2013), s.1991-1997
DOI:: Digital Object Identifier (open in new tab) 10.1002/pssa.201300096
Verified by:: Gdańsk University of Technology