High-efficiency grating-couplers: demonstration of a new design strategy

We present a simple and practical strategy that allows to design high-efficiency grating couplers. The technique is based on the simultaneous apodization of two structural parameters: the grating period and the fill-factor, along with the optimization of the grating coupler etching depth. Considerin...

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Autores principales: Marchetti, Riccardo, Lacava, Cosimo, Khokhar, Ali, Chen, Xia, Cristiani, Ilaria, Richardson, David J., Reed, Graham T., Petropoulos, Periklis, Minzioni, Paolo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5709428/
https://www.ncbi.nlm.nih.gov/pubmed/29192215
http://dx.doi.org/10.1038/s41598-017-16505-z
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author Marchetti, Riccardo
Lacava, Cosimo
Khokhar, Ali
Chen, Xia
Cristiani, Ilaria
Richardson, David J.
Reed, Graham T.
Petropoulos, Periklis
Minzioni, Paolo
author_facet Marchetti, Riccardo
Lacava, Cosimo
Khokhar, Ali
Chen, Xia
Cristiani, Ilaria
Richardson, David J.
Reed, Graham T.
Petropoulos, Periklis
Minzioni, Paolo
author_sort Marchetti, Riccardo
collection PubMed
description We present a simple and practical strategy that allows to design high-efficiency grating couplers. The technique is based on the simultaneous apodization of two structural parameters: the grating period and the fill-factor, along with the optimization of the grating coupler etching depth. Considering a 260 nm Si-thick Silicon-on-insulator platform, we numerically demonstrated a coupling efficiency of −0.8 dB (83%), well matching the experimental value of −0.9 dB (81%). Thanks to the optimized design, these results represent the best performance ever reported in the literature for SOI structures without the use of any back-reflector.
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spelling pubmed-57094282017-12-06 High-efficiency grating-couplers: demonstration of a new design strategy Marchetti, Riccardo Lacava, Cosimo Khokhar, Ali Chen, Xia Cristiani, Ilaria Richardson, David J. Reed, Graham T. Petropoulos, Periklis Minzioni, Paolo Sci Rep Article We present a simple and practical strategy that allows to design high-efficiency grating couplers. The technique is based on the simultaneous apodization of two structural parameters: the grating period and the fill-factor, along with the optimization of the grating coupler etching depth. Considering a 260 nm Si-thick Silicon-on-insulator platform, we numerically demonstrated a coupling efficiency of −0.8 dB (83%), well matching the experimental value of −0.9 dB (81%). Thanks to the optimized design, these results represent the best performance ever reported in the literature for SOI structures without the use of any back-reflector. Nature Publishing Group UK 2017-11-30 /pmc/articles/PMC5709428/ /pubmed/29192215 http://dx.doi.org/10.1038/s41598-017-16505-z Text en © The Author(s) 2017 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Marchetti, Riccardo
Lacava, Cosimo
Khokhar, Ali
Chen, Xia
Cristiani, Ilaria
Richardson, David J.
Reed, Graham T.
Petropoulos, Periklis
Minzioni, Paolo
High-efficiency grating-couplers: demonstration of a new design strategy
title High-efficiency grating-couplers: demonstration of a new design strategy
title_full High-efficiency grating-couplers: demonstration of a new design strategy
title_fullStr High-efficiency grating-couplers: demonstration of a new design strategy
title_full_unstemmed High-efficiency grating-couplers: demonstration of a new design strategy
title_short High-efficiency grating-couplers: demonstration of a new design strategy
title_sort high-efficiency grating-couplers: demonstration of a new design strategy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5709428/
https://www.ncbi.nlm.nih.gov/pubmed/29192215
http://dx.doi.org/10.1038/s41598-017-16505-z
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