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Plasmofluidic Disk Resonators

Waveguide-coupled silicon ring or disk resonators have been used for optical signal processing and sensing. Large-scale integration of optical devices demands continuous reduction in their footprints, and ultimately they need to be replaced by silicon-based plasmonic resonators. However, few wavegui...

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Detalles Bibliográficos
Autores principales: Kwon, Min-Suk, Ku, Bonwoo, Kim, Yonghan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4793221/
https://www.ncbi.nlm.nih.gov/pubmed/26979929
http://dx.doi.org/10.1038/srep23149
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author Kwon, Min-Suk
Ku, Bonwoo
Kim, Yonghan
author_facet Kwon, Min-Suk
Ku, Bonwoo
Kim, Yonghan
author_sort Kwon, Min-Suk
collection PubMed
description Waveguide-coupled silicon ring or disk resonators have been used for optical signal processing and sensing. Large-scale integration of optical devices demands continuous reduction in their footprints, and ultimately they need to be replaced by silicon-based plasmonic resonators. However, few waveguide-coupled silicon-based plasmonic resonators have been realized until now. Moreover, fluid cannot interact effectively with them since their resonance modes are strongly confined in solid regions. To solve this problem, this paper reports realized plasmofluidic disk resonators (PDRs). The PDR consists of a submicrometer radius silicon disk and metal laterally surrounding the disk with a 30-nm-wide channel in between. The channel is filled with fluid, and the resonance mode of the PDR is strongly confined in the fluid. The PDR coupled to a metal-insulator-silicon-insulator-metal waveguide is implemented by using standard complementary metal oxide semiconductor technology. If the refractive index of the fluid increases by 0.141, the transmission spectrum of the waveguide coupled to the PDR of radius 0.9 μm red-shifts by 30 nm. The PDR can be used as a refractive index sensor requiring a very small amount of analyte. Plus, the PDR filled with liquid crystal may be an ultracompact intensity modulator which is effectively controlled by small driving voltage.
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spelling pubmed-47932212016-03-16 Plasmofluidic Disk Resonators Kwon, Min-Suk Ku, Bonwoo Kim, Yonghan Sci Rep Article Waveguide-coupled silicon ring or disk resonators have been used for optical signal processing and sensing. Large-scale integration of optical devices demands continuous reduction in their footprints, and ultimately they need to be replaced by silicon-based plasmonic resonators. However, few waveguide-coupled silicon-based plasmonic resonators have been realized until now. Moreover, fluid cannot interact effectively with them since their resonance modes are strongly confined in solid regions. To solve this problem, this paper reports realized plasmofluidic disk resonators (PDRs). The PDR consists of a submicrometer radius silicon disk and metal laterally surrounding the disk with a 30-nm-wide channel in between. The channel is filled with fluid, and the resonance mode of the PDR is strongly confined in the fluid. The PDR coupled to a metal-insulator-silicon-insulator-metal waveguide is implemented by using standard complementary metal oxide semiconductor technology. If the refractive index of the fluid increases by 0.141, the transmission spectrum of the waveguide coupled to the PDR of radius 0.9 μm red-shifts by 30 nm. The PDR can be used as a refractive index sensor requiring a very small amount of analyte. Plus, the PDR filled with liquid crystal may be an ultracompact intensity modulator which is effectively controlled by small driving voltage. Nature Publishing Group 2016-03-16 /pmc/articles/PMC4793221/ /pubmed/26979929 http://dx.doi.org/10.1038/srep23149 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Kwon, Min-Suk
Ku, Bonwoo
Kim, Yonghan
Plasmofluidic Disk Resonators
title Plasmofluidic Disk Resonators
title_full Plasmofluidic Disk Resonators
title_fullStr Plasmofluidic Disk Resonators
title_full_unstemmed Plasmofluidic Disk Resonators
title_short Plasmofluidic Disk Resonators
title_sort plasmofluidic disk resonators
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4793221/
https://www.ncbi.nlm.nih.gov/pubmed/26979929
http://dx.doi.org/10.1038/srep23149
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