Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions

Abstract We numerically investigated the effects of meta-atom interactions on the Fano resonance in all-dielectric metasurfaces by introducing alternately flipped asymmetric paired bars (APBs) and split asymmetric paired bars (SAPBs). With alternately flipped configurations, the Q-factor of the Fano...

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Autores principales:	Guanghou Sun, Lierong Yuan, Yi Zhang, Xuejin Zhang, Yongyuan Zhu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d225cef97da441caa6bef751d5373bb6
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spelling	oai:doaj.org-article:d225cef97da441caa6bef751d5373bb62021-12-02T12:32:30ZQ-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions10.1038/s41598-017-07715-62045-2322https://doaj.org/article/d225cef97da441caa6bef751d5373bb62017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07715-6https://doaj.org/toc/2045-2322Abstract We numerically investigated the effects of meta-atom interactions on the Fano resonance in all-dielectric metasurfaces by introducing alternately flipped asymmetric paired bars (APBs) and split asymmetric paired bars (SAPBs). With alternately flipped configurations, the Q-factor of the Fano resonance is significantly enhanced up to one order of magnitude, and the electric field is strengthened by more than twice. Abnormally, the Q-factor increases with gap size in the alternately flipped SAPBs. These are attributed to the destructive interaction among nearest-neighbor dipole resonators. The Q-factor of 108 and Raman enhancement factor of 109 in the gap can be realized with the alternately flipped SAPBs made of Si. Our study provides a way to improve performance of practical devices such as ultrasensitive sensors, nonlinear optics, and quantum emitters.Guanghou SunLierong YuanYi ZhangXuejin ZhangYongyuan ZhuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Guanghou Sun Lierong Yuan Yi Zhang Xuejin Zhang Yongyuan Zhu Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions
description	Abstract We numerically investigated the effects of meta-atom interactions on the Fano resonance in all-dielectric metasurfaces by introducing alternately flipped asymmetric paired bars (APBs) and split asymmetric paired bars (SAPBs). With alternately flipped configurations, the Q-factor of the Fano resonance is significantly enhanced up to one order of magnitude, and the electric field is strengthened by more than twice. Abnormally, the Q-factor increases with gap size in the alternately flipped SAPBs. These are attributed to the destructive interaction among nearest-neighbor dipole resonators. The Q-factor of 108 and Raman enhancement factor of 109 in the gap can be realized with the alternately flipped SAPBs made of Si. Our study provides a way to improve performance of practical devices such as ultrasensitive sensors, nonlinear optics, and quantum emitters.
format	article
author	Guanghou Sun Lierong Yuan Yi Zhang Xuejin Zhang Yongyuan Zhu
author_facet	Guanghou Sun Lierong Yuan Yi Zhang Xuejin Zhang Yongyuan Zhu
author_sort	Guanghou Sun
title	Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions
title_short	Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions
title_full	Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions
title_fullStr	Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions
title_full_unstemmed	Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions
title_sort	q-factor enhancement of fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/d225cef97da441caa6bef751d5373bb6
work_keys_str_mv	AT guanghousun qfactorenhancementoffanoresonanceinalldielectricmetasurfacesbymodulatingmetaatominteractions AT lierongyuan qfactorenhancementoffanoresonanceinalldielectricmetasurfacesbymodulatingmetaatominteractions AT yizhang qfactorenhancementoffanoresonanceinalldielectricmetasurfacesbymodulatingmetaatominteractions AT xuejinzhang qfactorenhancementoffanoresonanceinalldielectricmetasurfacesbymodulatingmetaatominteractions AT yongyuanzhu qfactorenhancementoffanoresonanceinalldielectricmetasurfacesbymodulatingmetaatominteractions
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Q-factor enhancement of Fano resonance in all-dielectric metasurfaces by modulating meta-atom interactions

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