Cargando…

High-Performance On-Chip Silicon Beamsplitter Based on Subwavelength Metamaterials for Enhanced Fabrication Tolerance

Efficient power splitting is a fundamental functionality in silicon photonic integrated circuits, but state-of-the-art power-division architectures are hampered by limited operational bandwidth, high sensitivity to fabrication errors or large footprints. In particular, traditional Y-junction power s...

Descripción completa

Detalles Bibliográficos
Autores principales: Fernández de Cabo, Raquel, González-Andrade, David, Cheben, Pavel, Velasco, Aitor V.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8156219/
https://www.ncbi.nlm.nih.gov/pubmed/34069199
http://dx.doi.org/10.3390/nano11051304
_version_ 1783699389940760576
author Fernández de Cabo, Raquel
González-Andrade, David
Cheben, Pavel
Velasco, Aitor V.
author_facet Fernández de Cabo, Raquel
González-Andrade, David
Cheben, Pavel
Velasco, Aitor V.
author_sort Fernández de Cabo, Raquel
collection PubMed
description Efficient power splitting is a fundamental functionality in silicon photonic integrated circuits, but state-of-the-art power-division architectures are hampered by limited operational bandwidth, high sensitivity to fabrication errors or large footprints. In particular, traditional Y-junction power splitters suffer from fundamental mode losses due to limited fabrication resolution near the junction tip. In order to circumvent this limitation, we propose a new type of high-performance Y-junction power splitter that incorporates subwavelength metamaterials. Full three-dimensional simulations show a fundamental mode excess loss below 0.1 dB in an ultra-broad bandwidth of 300 nm (1400–1700 nm) when optimized for a fabrication resolution of 50 nm, and under 0.3 dB in a 350 nm extended bandwidth (1350–1700 nm) for a 100 nm resolution. Moreover, analysis of fabrication tolerances shows robust operation for the fundamental mode to etching errors up to ±20 nm. A proof-of-concept device provides an initial validation of its operation principle, showing experimental excess losses lower than 0.2 dB in a 195 nm bandwidth for the best-case resolution scenario (i.e., 50 nm).
format Online
Article
Text
id pubmed-8156219
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-81562192021-05-28 High-Performance On-Chip Silicon Beamsplitter Based on Subwavelength Metamaterials for Enhanced Fabrication Tolerance Fernández de Cabo, Raquel González-Andrade, David Cheben, Pavel Velasco, Aitor V. Nanomaterials (Basel) Article Efficient power splitting is a fundamental functionality in silicon photonic integrated circuits, but state-of-the-art power-division architectures are hampered by limited operational bandwidth, high sensitivity to fabrication errors or large footprints. In particular, traditional Y-junction power splitters suffer from fundamental mode losses due to limited fabrication resolution near the junction tip. In order to circumvent this limitation, we propose a new type of high-performance Y-junction power splitter that incorporates subwavelength metamaterials. Full three-dimensional simulations show a fundamental mode excess loss below 0.1 dB in an ultra-broad bandwidth of 300 nm (1400–1700 nm) when optimized for a fabrication resolution of 50 nm, and under 0.3 dB in a 350 nm extended bandwidth (1350–1700 nm) for a 100 nm resolution. Moreover, analysis of fabrication tolerances shows robust operation for the fundamental mode to etching errors up to ±20 nm. A proof-of-concept device provides an initial validation of its operation principle, showing experimental excess losses lower than 0.2 dB in a 195 nm bandwidth for the best-case resolution scenario (i.e., 50 nm). MDPI 2021-05-14 /pmc/articles/PMC8156219/ /pubmed/34069199 http://dx.doi.org/10.3390/nano11051304 Text en © 2021 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
Fernández de Cabo, Raquel
González-Andrade, David
Cheben, Pavel
Velasco, Aitor V.
High-Performance On-Chip Silicon Beamsplitter Based on Subwavelength Metamaterials for Enhanced Fabrication Tolerance
title High-Performance On-Chip Silicon Beamsplitter Based on Subwavelength Metamaterials for Enhanced Fabrication Tolerance
title_full High-Performance On-Chip Silicon Beamsplitter Based on Subwavelength Metamaterials for Enhanced Fabrication Tolerance
title_fullStr High-Performance On-Chip Silicon Beamsplitter Based on Subwavelength Metamaterials for Enhanced Fabrication Tolerance
title_full_unstemmed High-Performance On-Chip Silicon Beamsplitter Based on Subwavelength Metamaterials for Enhanced Fabrication Tolerance
title_short High-Performance On-Chip Silicon Beamsplitter Based on Subwavelength Metamaterials for Enhanced Fabrication Tolerance
title_sort high-performance on-chip silicon beamsplitter based on subwavelength metamaterials for enhanced fabrication tolerance
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8156219/
https://www.ncbi.nlm.nih.gov/pubmed/34069199
http://dx.doi.org/10.3390/nano11051304
work_keys_str_mv AT fernandezdecaboraquel highperformanceonchipsiliconbeamsplitterbasedonsubwavelengthmetamaterialsforenhancedfabricationtolerance
AT gonzalezandradedavid highperformanceonchipsiliconbeamsplitterbasedonsubwavelengthmetamaterialsforenhancedfabricationtolerance
AT chebenpavel highperformanceonchipsiliconbeamsplitterbasedonsubwavelengthmetamaterialsforenhancedfabricationtolerance
AT velascoaitorv highperformanceonchipsiliconbeamsplitterbasedonsubwavelengthmetamaterialsforenhancedfabricationtolerance