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Subwavelength Grating Waveguide Structures Proposed on the Low-Cost Silica–Titania Platform for Optical Filtering and Refractive Index Sensing Applications

The sol–gel dip-coating method is a cost-efficient way for the realization of thin films on a planar substrate. In this work, high-quality, low-loss, and low-surface roughness silica–titania thin films are deposited on a glass substrate with the sol–gel dip-coating method. This platform works in the...

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Autores principales: Butt, Muhammad A., Tyszkiewicz, Cuma, Wojtasik, Katarzyna, Karasiński, Paweł, Kaźmierczak, Andrzej, Piramidowicz, Ryszard
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9224213/
https://www.ncbi.nlm.nih.gov/pubmed/35743057
http://dx.doi.org/10.3390/ijms23126614
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author Butt, Muhammad A.
Tyszkiewicz, Cuma
Wojtasik, Katarzyna
Karasiński, Paweł
Kaźmierczak, Andrzej
Piramidowicz, Ryszard
author_facet Butt, Muhammad A.
Tyszkiewicz, Cuma
Wojtasik, Katarzyna
Karasiński, Paweł
Kaźmierczak, Andrzej
Piramidowicz, Ryszard
author_sort Butt, Muhammad A.
collection PubMed
description The sol–gel dip-coating method is a cost-efficient way for the realization of thin films on a planar substrate. In this work, high-quality, low-loss, and low-surface roughness silica–titania thin films are deposited on a glass substrate with the sol–gel dip-coating method. This platform works in the visible to near-IR wavelength ranges and can be useful for several eye-catching photonic components. The paper is comprised of two parts: the first part deals with the development of a low-cost silica–titania waveguide system, whereas the second part provides detail on the numerical modeling of the SWG waveguide filter and SWG waveguide FP-sensor design. The SWG waveguide NIR-stopband filter can achieve an ER of >40 dB and 3-dB bandwidth of 110 nm designed at optimized parameters. The SWG waveguide-FP structure proposed in this work act as a refractive index sensor where the sensitivity is ~120 nm/RIU by reducing the width of the waveguide. This sensitivity can be further enhanced by reducing the waveguide height. We believe that this work is quite important for the realization of low-cost integrated photonic devices based on the silica–titania platform developed via the sol–gel dip-coating method.
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spelling pubmed-92242132022-06-24 Subwavelength Grating Waveguide Structures Proposed on the Low-Cost Silica–Titania Platform for Optical Filtering and Refractive Index Sensing Applications Butt, Muhammad A. Tyszkiewicz, Cuma Wojtasik, Katarzyna Karasiński, Paweł Kaźmierczak, Andrzej Piramidowicz, Ryszard Int J Mol Sci Article The sol–gel dip-coating method is a cost-efficient way for the realization of thin films on a planar substrate. In this work, high-quality, low-loss, and low-surface roughness silica–titania thin films are deposited on a glass substrate with the sol–gel dip-coating method. This platform works in the visible to near-IR wavelength ranges and can be useful for several eye-catching photonic components. The paper is comprised of two parts: the first part deals with the development of a low-cost silica–titania waveguide system, whereas the second part provides detail on the numerical modeling of the SWG waveguide filter and SWG waveguide FP-sensor design. The SWG waveguide NIR-stopband filter can achieve an ER of >40 dB and 3-dB bandwidth of 110 nm designed at optimized parameters. The SWG waveguide-FP structure proposed in this work act as a refractive index sensor where the sensitivity is ~120 nm/RIU by reducing the width of the waveguide. This sensitivity can be further enhanced by reducing the waveguide height. We believe that this work is quite important for the realization of low-cost integrated photonic devices based on the silica–titania platform developed via the sol–gel dip-coating method. MDPI 2022-06-14 /pmc/articles/PMC9224213/ /pubmed/35743057 http://dx.doi.org/10.3390/ijms23126614 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Butt, Muhammad A.
Tyszkiewicz, Cuma
Wojtasik, Katarzyna
Karasiński, Paweł
Kaźmierczak, Andrzej
Piramidowicz, Ryszard
Subwavelength Grating Waveguide Structures Proposed on the Low-Cost Silica–Titania Platform for Optical Filtering and Refractive Index Sensing Applications
title Subwavelength Grating Waveguide Structures Proposed on the Low-Cost Silica–Titania Platform for Optical Filtering and Refractive Index Sensing Applications
title_full Subwavelength Grating Waveguide Structures Proposed on the Low-Cost Silica–Titania Platform for Optical Filtering and Refractive Index Sensing Applications
title_fullStr Subwavelength Grating Waveguide Structures Proposed on the Low-Cost Silica–Titania Platform for Optical Filtering and Refractive Index Sensing Applications
title_full_unstemmed Subwavelength Grating Waveguide Structures Proposed on the Low-Cost Silica–Titania Platform for Optical Filtering and Refractive Index Sensing Applications
title_short Subwavelength Grating Waveguide Structures Proposed on the Low-Cost Silica–Titania Platform for Optical Filtering and Refractive Index Sensing Applications
title_sort subwavelength grating waveguide structures proposed on the low-cost silica–titania platform for optical filtering and refractive index sensing applications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9224213/
https://www.ncbi.nlm.nih.gov/pubmed/35743057
http://dx.doi.org/10.3390/ijms23126614
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