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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...

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Autores principales: Suido, Yu, Yamamoto, Yosuke, Thomas, Gaulier, Ajiki, Yoshiharu, Kan, Tetsuo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
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.
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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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