THz guided-mode resonance notch filter with variable filtering strength

Abstract In this paper, we propose a terahertz (THz) guided-mode resonance (GMR) notch filter made of a monolithic polyethylene terephthalate (PET) film, which has a monolayer grating structure. The proposed configuration shows both polarization-dependent and polarization-independent notch filter ch...

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Autores principales:	Hyeon Sang Bark, Kyu-Ha Jang, Kitae Lee, Young Uk Jeong, Tae-In Jeon
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f8ffbcce665343dca152f649766d129a
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id	oai:doaj.org-article:f8ffbcce665343dca152f649766d129a
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spelling	oai:doaj.org-article:f8ffbcce665343dca152f649766d129a2021-12-02T15:22:57ZTHz guided-mode resonance notch filter with variable filtering strength10.1038/s41598-020-80134-22045-2322https://doaj.org/article/f8ffbcce665343dca152f649766d129a2021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80134-2https://doaj.org/toc/2045-2322Abstract In this paper, we propose a terahertz (THz) guided-mode resonance (GMR) notch filter made of a monolithic polyethylene terephthalate (PET) film, which has a monolayer grating structure. The proposed configuration shows both polarization-dependent and polarization-independent notch filter characteristics for the incident THz wave depending on the rotation angle of the second grating film. When the rotation angle is 0°, the filtering strength (transmittance) at resonance frequency changes from 0.4 (0.996) to 99.0% (0.010) according to the incident polarization. The transmittance continuously decreases with increasing rotation angle until 90°. When the rotation angle is 90°, the transmittance converges to 0.065 (± 0.015) independent of the incident wave polarization. When the incident polarization angle ranges from 90° to 180°, paradoxically, the transmittance through the two GMR grating films is greater than the transmittance through only the first GMR grating film due to the enhancement of the vertical component of the THz wave. These results agree well with a calculation using a polar coordinate system.Hyeon Sang BarkKyu-Ha JangKitae LeeYoung Uk JeongTae-In JeonNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hyeon Sang Bark Kyu-Ha Jang Kitae Lee Young Uk Jeong Tae-In Jeon THz guided-mode resonance notch filter with variable filtering strength
description	Abstract In this paper, we propose a terahertz (THz) guided-mode resonance (GMR) notch filter made of a monolithic polyethylene terephthalate (PET) film, which has a monolayer grating structure. The proposed configuration shows both polarization-dependent and polarization-independent notch filter characteristics for the incident THz wave depending on the rotation angle of the second grating film. When the rotation angle is 0°, the filtering strength (transmittance) at resonance frequency changes from 0.4 (0.996) to 99.0% (0.010) according to the incident polarization. The transmittance continuously decreases with increasing rotation angle until 90°. When the rotation angle is 90°, the transmittance converges to 0.065 (± 0.015) independent of the incident wave polarization. When the incident polarization angle ranges from 90° to 180°, paradoxically, the transmittance through the two GMR grating films is greater than the transmittance through only the first GMR grating film due to the enhancement of the vertical component of the THz wave. These results agree well with a calculation using a polar coordinate system.
format	article
author	Hyeon Sang Bark Kyu-Ha Jang Kitae Lee Young Uk Jeong Tae-In Jeon
author_facet	Hyeon Sang Bark Kyu-Ha Jang Kitae Lee Young Uk Jeong Tae-In Jeon
author_sort	Hyeon Sang Bark
title	THz guided-mode resonance notch filter with variable filtering strength
title_short	THz guided-mode resonance notch filter with variable filtering strength
title_full	THz guided-mode resonance notch filter with variable filtering strength
title_fullStr	THz guided-mode resonance notch filter with variable filtering strength
title_full_unstemmed	THz guided-mode resonance notch filter with variable filtering strength
title_sort	thz guided-mode resonance notch filter with variable filtering strength
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f8ffbcce665343dca152f649766d129a
work_keys_str_mv	AT hyeonsangbark thzguidedmoderesonancenotchfilterwithvariablefilteringstrength AT kyuhajang thzguidedmoderesonancenotchfilterwithvariablefilteringstrength AT kitaelee thzguidedmoderesonancenotchfilterwithvariablefilteringstrength AT youngukjeong thzguidedmoderesonancenotchfilterwithvariablefilteringstrength AT taeinjeon thzguidedmoderesonancenotchfilterwithvariablefilteringstrength
_version_	1718387407374516224

THz guided-mode resonance notch filter with variable filtering strength

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