Anomalous blueshift of aperture resonance enabled by the loss of a thin film

Abstract The substrate effects on aperture resonance have been widely studied because the resonance peak position is key for sensing, communications, and field enhancement applications. So far, the theoretical works have focused on the lossless infinite substrate case, which only explains the resona...

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Autor principal:	Jisoo Kyoung
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5e56e7c828044fe9aa093959a58d77ca
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spelling	oai:doaj.org-article:5e56e7c828044fe9aa093959a58d77ca2021-12-02T13:34:10ZAnomalous blueshift of aperture resonance enabled by the loss of a thin film10.1038/s41598-020-79224-y2045-2322https://doaj.org/article/5e56e7c828044fe9aa093959a58d77ca2020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-79224-yhttps://doaj.org/toc/2045-2322Abstract The substrate effects on aperture resonance have been widely studied because the resonance peak position is key for sensing, communications, and field enhancement applications. So far, the theoretical works have focused on the lossless infinite substrate case, which only explains the resonance peak redshift by the substrate index. The loss effect has not been investigated yet because lossy infinite substrate significantly reduces the aperture transmission. Therefore, this work studied the loss effect on aperture resonance via an analytic model of the transmission though slot antennas on a finite substrate. When the substrate thickness was very thin compared to the wavelength, the transmittance remained high even for a large imaginary part of the refractive index; furthermore, the developed model predicted a strong blueshift when this imaginary part exceeds the real part. Besides, the zero of the imaginary part of the coupling strength was crucial in determining the resonance frequency for both infinite and finite substrates. Thus, this study can contribute to the material characterization, label-free detection, and efficient design of active metamaterials.Jisoo KyoungNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-8 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Jisoo Kyoung Anomalous blueshift of aperture resonance enabled by the loss of a thin film
description	Abstract The substrate effects on aperture resonance have been widely studied because the resonance peak position is key for sensing, communications, and field enhancement applications. So far, the theoretical works have focused on the lossless infinite substrate case, which only explains the resonance peak redshift by the substrate index. The loss effect has not been investigated yet because lossy infinite substrate significantly reduces the aperture transmission. Therefore, this work studied the loss effect on aperture resonance via an analytic model of the transmission though slot antennas on a finite substrate. When the substrate thickness was very thin compared to the wavelength, the transmittance remained high even for a large imaginary part of the refractive index; furthermore, the developed model predicted a strong blueshift when this imaginary part exceeds the real part. Besides, the zero of the imaginary part of the coupling strength was crucial in determining the resonance frequency for both infinite and finite substrates. Thus, this study can contribute to the material characterization, label-free detection, and efficient design of active metamaterials.
format	article
author	Jisoo Kyoung
author_facet	Jisoo Kyoung
author_sort	Jisoo Kyoung
title	Anomalous blueshift of aperture resonance enabled by the loss of a thin film
title_short	Anomalous blueshift of aperture resonance enabled by the loss of a thin film
title_full	Anomalous blueshift of aperture resonance enabled by the loss of a thin film
title_fullStr	Anomalous blueshift of aperture resonance enabled by the loss of a thin film
title_full_unstemmed	Anomalous blueshift of aperture resonance enabled by the loss of a thin film
title_sort	anomalous blueshift of aperture resonance enabled by the loss of a thin film
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/5e56e7c828044fe9aa093959a58d77ca
work_keys_str_mv	AT jisookyoung anomalousblueshiftofapertureresonanceenabledbythelossofathinfilm
_version_	1718392797935960064

Anomalous blueshift of aperture resonance enabled by the loss of a thin film

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