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2 results on '"Gaulier Thomas"'

1. Extension of the Measurable Wavelength Range for a Near-Infrared Spectrometer Using a Plasmonic Au Grating on a Si Substrate

Author

Yu Suido, Yosuke Yamamoto, Gaulier Thomas, Yoshiharu Ajiki, and Tetsuo Kan

Subjects
near-infrared, spectroscopy, surface plasmon resonance, Schottky barrier, grating, Si, Mechanical engineering and machinery, TJ1-1570
Abstract

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.

Published
2019
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2. Extension of the Measurable Wavelength Range for a Near-Infrared Spectrometer Using a Plasmonic Au Grating on a Si Substrate

Author

Yosuke Yamamoto, Yoshiharu Ajiki, Tetsuo Kan, Gaulier Thomas, and Yu Suido

Subjects
spectroscopy, Materials science, lcsh:Mechanical engineering and machinery, Photodetector, Physics::Optics, 02 engineering and technology, Grating, 01 natural sciences, near-infrared, Article, 010309 optics, Responsivity, grating, 0103 physical sciences, lcsh:TJ1-1570, Electrical and Electronic Engineering, Surface plasmon resonance, Spectroscopy, Schottky barrier, Plasmon, business.industry, Mechanical Engineering, Near-infrared spectroscopy, 021001 nanoscience & nanotechnology, Wavelength, Control and Systems Engineering, Optoelectronics, Si, 0210 nano-technology, business, surface plasmon resonance
Abstract

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&ndash, 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.

Published
2019

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