Low cost sol gel derived silica-titania waveguide films - Characterization
Authors:
- Magdalena Zięba,
- Cuma Tyszkiewicz,
- Katarzyna Wojtasik,
- Krystian Pavłov,
- Paweł Chaber,
- Ewa Gondek,
- Jacek Nizioł,
- Roman Rogoziński,
- Paweł Kielan,
- Paweł Karasiński
Abstract
This work reports a study on low-loss waveguide layers for planar evanescent wave sensor applications. Crackfree SiOx:TiOy composite layers with refractive indices of ~1.65, in the visible spectra range, were fabricated using a sol-gel method and a dip-coating technique. Layers of thickness in the 220–360 nm range were produced in a single coating process. By multiple coatings, SiOx:TiOy composite layers of thickness up to 1000 nm were produced. Fabricated layers demonstrated good waveguide properties in the Vis spectral range. The dispersion characteristics of the developed layers refractive index were determined using the spectroscopic ellipsometry method. Spectrophotometric tests validated their optical homogeneity. Using the Tauc method, the widths of optical band gaps were determined, and their high values (Eg > 3.7 eV) attest to the amorphous nature of the layer material. The FT-IR studies testified to Si-O-Ti bonds, an attribute of amorphous SiOx:TiOy composites. The tests of surface morphology of the SiOx:TiOy layers, using atomic force microscopy, scanning electron microscopy, and optical profilometry, confirmed their high smoothness. Using the m-line method, waveguide properties and optical losses were examined. To facilitate the interpretation of the experimental results, the mode characteristics and the calculated impact of surface morphology of the waveguide layer.
- Record ID
- CUTe5cbc4ef64c44c449a8070af78e1838f
- Publication categories
- ;
- Author
- Journal series
- Optics and Laser Technology, ISSN 0030-3992, e-ISSN 1879-2545
- Issue year
- 2024
- Vol
- 171
- Pages
- [1-11]
- Article number
- 110339
- Other elements of collation
- rys.; wykr.; Bibliografia (na s.) - 10-11; Bibliografia (liczba pozycji) - 55; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 171
- Keywords in English
- sol-gel, silica-titania, thin film, dip-coating, planar waveguide, optical loss
- ASJC Classification
- ; ;
- DOI
- DOI:10.1016/j.optlastec.2023.110339 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S003039922301232X Opening in a new tab
- Related project
- Hybrydowe platformy czujnikowe zintegrowanych układów fotonicznych na bazie materiałów ceramicznych i polimerowych. . Project leader at PK: , ,
- Language
- eng (en) English
- License
- Score (nominal)
- 100
- Score source
- journalList
- Score
- Publication indicators
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTe5cbc4ef64c44c449a8070af78e1838f/
- URN
urn:pkr-prod:CUTe5cbc4ef64c44c449a8070af78e1838f
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