Atomic layer deposited metallic oxides for optical fiber sensors (Conference Presentation)

Kamil Kosiel; Karolina Pagowska; Maciej Kozubal; Marek Guziewicz; Krystyna Golaszewska-Malec; Krystyna Lawniczak-Jablonska; Rafal Jakiela; Pawel Rejmak; Joanna Libera; Malgorzata Kalisz; Marcin Koba; Michal Szymański; Magdalena Dominik; Joanna Niedziólka-Jönsson; Wojtek Bock; Mateusz Smietana

doi:10.1117/12.2510580

8 March 2019 Atomic layer deposited metallic oxides for optical fiber sensors (Conference Presentation)

Kamil Kosiel, Karolina Pagowska, Maciej Kozubal, Marek Guziewicz, Krystyna Golaszewska-Malec, Krystyna Lawniczak-Jablonska, Rafal Jakiela, Pawel Rejmak, Joanna Libera, Malgorzata Kalisz, Marcin Koba, Michal Szymański, Magdalena Dominik, Joanna Niedziólka-Jönsson, Wojtek Bock, Mateusz Smietana

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Proceedings Volume 10926, Quantum Sensing and Nano Electronics and Photonics XVI; 109261B (2019) https://doi.org/10.1117/12.2510580
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

Novel optical sensors the most often require thin films or surface structures with strictly controlled properties, playing a critical role in them by initiating or modifying their sensorial responses. Selected results of research on atomic layer deposited (ALD) metallic oxides will be shown, regarding their applicability for thin functional coatings in lossy mode resonance (LMR) and long period grating (LPG) optical fiber sensors. Basically amorphous films of tantalum oxide (TaxOy), zirconium oxide (ZrxOy) and hafnium oxide (HfxOy) below 200 nm were deposited at relatively low temperature (LT) of 100°C. The optical, structural, topographical, tribological, hydrophilic and chemical stability properties of the films and their technological controllability were analysed. The TaxOy was selected and successfully applied as an oxide coating in LPG sensor. As chemically robust in alkali environment (pH over 9) it allowed to gain a potential for fabrication of regenerable/reusable biosensor. Additionally, ALD technique was tested as a tool for tailoring sensorial properties of LMR sensors. The double-layer coatings composed of two different materials were experimentally tested for the first time; the coatings were composed of plasma-enhanced chemical vapour deposited (PECVD) silicon nitride (SixNy) followed by much thinner ALD TaxOy. That approach yielded operating devices, ensuring fast overlay fabrication and easy tuning of the resonant wavelength at the same time. The LT ALD TaxOy films turned out to be slightly overstoichiometric (y/x approx. 2.75). Therefore, the issue of TaxOy chemical composition was studied by secondary ion mass spectroscopy, Rutherford backscattering spectrometry and x-ray photoelectron spectrometry.

Conference Presentation

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Kamil Kosiel, Karolina Pagowska, Maciej Kozubal, Marek Guziewicz, Krystyna Golaszewska-Malec, Krystyna Lawniczak-Jablonska, Rafal Jakiela, Pawel Rejmak, Joanna Libera, Malgorzata Kalisz, Marcin Koba, Michal Szymański, Magdalena Dominik, Joanna Niedziólka-Jönsson, Wojtek Bock, and Mateusz Smietana "Atomic layer deposited metallic oxides for optical fiber sensors (Conference Presentation)", Proc. SPIE 10926, Quantum Sensing and Nano Electronics and Photonics XVI, 109261B (8 March 2019); https://doi.org/10.1117/12.2510580

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KEYWORDS

Oxides

Fiber optics sensors

Atomic layer deposition

Sensors

Chemical analysis

Optical coatings

Spectroscopy

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