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Extension of the Measurable Wavelength Range for a Near-Infrared Spectrometer Using a Plasmonic Au Grating on a Si Substrate
In this paper, we proposed near-infrared spectroscopy based on a Si photodetector equipped with a gold grating and extended the measurable wavelength range to cover 1200–1600 nm by improving a spectrum derivation procedure. In the spectrum derivation, photocurrent data during alteration of the incid...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6630820/ https://www.ncbi.nlm.nih.gov/pubmed/31212981 http://dx.doi.org/10.3390/mi10060403 |
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author | Suido, Yu Yamamoto, Yosuke Thomas, Gaulier Ajiki, Yoshiharu Kan, Tetsuo |
author_facet | Suido, Yu Yamamoto, Yosuke Thomas, Gaulier Ajiki, Yoshiharu Kan, Tetsuo |
author_sort | Suido, Yu |
collection | PubMed |
description | In this paper, we proposed near-infrared spectroscopy based on a Si photodetector equipped with a gold grating and extended the measurable wavelength range to cover 1200–1600 nm by improving a spectrum derivation procedure. In the spectrum derivation, photocurrent data during alteration of the incidence angle of the measured light were converted using a responsivity matrix R, which determines the spectroscopic characteristics of the photodetector device. A generalized inverse matrix of R was used to obtain the spectrum and to fit a situation where multiple surface plasmon resonance (SPR) peaks appeared in the scanning range. When light composed of two wavelengths, 1250 nm and 1450 nm, was irradiated, the two wavelengths were distinctively discriminated using the improved method. |
format | Online Article Text |
id | pubmed-6630820 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-66308202019-08-19 Extension of the Measurable Wavelength Range for a Near-Infrared Spectrometer Using a Plasmonic Au Grating on a Si Substrate Suido, Yu Yamamoto, Yosuke Thomas, Gaulier Ajiki, Yoshiharu Kan, Tetsuo Micromachines (Basel) Article In this paper, we proposed near-infrared spectroscopy based on a Si photodetector equipped with a gold grating and extended the measurable wavelength range to cover 1200–1600 nm by improving a spectrum derivation procedure. In the spectrum derivation, photocurrent data during alteration of the incidence angle of the measured light were converted using a responsivity matrix R, which determines the spectroscopic characteristics of the photodetector device. A generalized inverse matrix of R was used to obtain the spectrum and to fit a situation where multiple surface plasmon resonance (SPR) peaks appeared in the scanning range. When light composed of two wavelengths, 1250 nm and 1450 nm, was irradiated, the two wavelengths were distinctively discriminated using the improved method. MDPI 2019-06-17 /pmc/articles/PMC6630820/ /pubmed/31212981 http://dx.doi.org/10.3390/mi10060403 Text en © 2019 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Suido, Yu Yamamoto, Yosuke Thomas, Gaulier Ajiki, Yoshiharu Kan, Tetsuo Extension of the Measurable Wavelength Range for a Near-Infrared Spectrometer Using a Plasmonic Au Grating on a Si Substrate |
title | Extension of the Measurable Wavelength Range for a Near-Infrared Spectrometer Using a Plasmonic Au Grating on a Si Substrate |
title_full | Extension of the Measurable Wavelength Range for a Near-Infrared Spectrometer Using a Plasmonic Au Grating on a Si Substrate |
title_fullStr | Extension of the Measurable Wavelength Range for a Near-Infrared Spectrometer Using a Plasmonic Au Grating on a Si Substrate |
title_full_unstemmed | Extension of the Measurable Wavelength Range for a Near-Infrared Spectrometer Using a Plasmonic Au Grating on a Si Substrate |
title_short | Extension of the Measurable Wavelength Range for a Near-Infrared Spectrometer Using a Plasmonic Au Grating on a Si Substrate |
title_sort | extension of the measurable wavelength range for a near-infrared spectrometer using a plasmonic au grating on a si substrate |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6630820/ https://www.ncbi.nlm.nih.gov/pubmed/31212981 http://dx.doi.org/10.3390/mi10060403 |
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