Construction of Optical Topological Cavities Using Photonic Crystals

A novel design of the Fabry–Pérot optical cavity is proposed, utilizing both the topological interface state structures and photonic bandgap materials with a controllable reflection phase. A one-to-one correspondence between the traditional Fabry–Pérot cavity and optical topological cavity is found,...

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Autores principales:	Meng Yuan, Tao Xu, Zhi Hong Hang
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	photonic crystal topological interface states reflection phase Zak phase valley–spin Hall effect Physics QC1-999
Acceso en línea:	https://doaj.org/article/ef131afee0544459bcd2cea8a16673c7
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spelling	oai:doaj.org-article:ef131afee0544459bcd2cea8a16673c72021-11-30T19:30:07ZConstruction of Optical Topological Cavities Using Photonic Crystals2296-424X10.3389/fphy.2021.697719https://doaj.org/article/ef131afee0544459bcd2cea8a16673c72021-06-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fphy.2021.697719/fullhttps://doaj.org/toc/2296-424XA novel design of the Fabry–Pérot optical cavity is proposed, utilizing both the topological interface state structures and photonic bandgap materials with a controllable reflection phase. A one-to-one correspondence between the traditional Fabry–Pérot cavity and optical topological cavity is found, while the tunable reflection phase of the photonic crystal mirrors provides an extra degree of freedom on cavity mode selection. The relationship between the Zak phase and photonic bandgap provides theoretical guidance to the manipulation of the reflection phase of photonic crystals. The dispersions of interface states with different topology origins are explored. Linear interfacial dispersion emerging in photonic crystals with the valley–spin Hall effect leads to an extra n = 0 cavity mode compared to the Zak phase–induced deterministic interface states with quadratic dispersion. The frequency of the n = 0 cavity mode is not affected by the cavity length, whose quality factor can also be tuned by the thickness of the photonic crystal mirrors. With the recent help of topology photonics in the tuning reflection phase and dispersion relationship, we hope our results can provide more intriguing ideas to construct topological optical devices.Meng YuanTao XuTao XuZhi Hong HangZhi Hong HangFrontiers Media S.A.articlephotonic crystaltopological interface statesreflection phaseZak phasevalley–spin Hall effectPhysicsQC1-999ENFrontiers in Physics, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	photonic crystal topological interface states reflection phase Zak phase valley–spin Hall effect Physics QC1-999
spellingShingle	photonic crystal topological interface states reflection phase Zak phase valley–spin Hall effect Physics QC1-999 Meng Yuan Tao Xu Tao Xu Zhi Hong Hang Zhi Hong Hang Construction of Optical Topological Cavities Using Photonic Crystals
description	A novel design of the Fabry–Pérot optical cavity is proposed, utilizing both the topological interface state structures and photonic bandgap materials with a controllable reflection phase. A one-to-one correspondence between the traditional Fabry–Pérot cavity and optical topological cavity is found, while the tunable reflection phase of the photonic crystal mirrors provides an extra degree of freedom on cavity mode selection. The relationship between the Zak phase and photonic bandgap provides theoretical guidance to the manipulation of the reflection phase of photonic crystals. The dispersions of interface states with different topology origins are explored. Linear interfacial dispersion emerging in photonic crystals with the valley–spin Hall effect leads to an extra n = 0 cavity mode compared to the Zak phase–induced deterministic interface states with quadratic dispersion. The frequency of the n = 0 cavity mode is not affected by the cavity length, whose quality factor can also be tuned by the thickness of the photonic crystal mirrors. With the recent help of topology photonics in the tuning reflection phase and dispersion relationship, we hope our results can provide more intriguing ideas to construct topological optical devices.
format	article
author	Meng Yuan Tao Xu Tao Xu Zhi Hong Hang Zhi Hong Hang
author_facet	Meng Yuan Tao Xu Tao Xu Zhi Hong Hang Zhi Hong Hang
author_sort	Meng Yuan
title	Construction of Optical Topological Cavities Using Photonic Crystals
title_short	Construction of Optical Topological Cavities Using Photonic Crystals
title_full	Construction of Optical Topological Cavities Using Photonic Crystals
title_fullStr	Construction of Optical Topological Cavities Using Photonic Crystals
title_full_unstemmed	Construction of Optical Topological Cavities Using Photonic Crystals
title_sort	construction of optical topological cavities using photonic crystals
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/ef131afee0544459bcd2cea8a16673c7
work_keys_str_mv	AT mengyuan constructionofopticaltopologicalcavitiesusingphotoniccrystals AT taoxu constructionofopticaltopologicalcavitiesusingphotoniccrystals AT taoxu constructionofopticaltopologicalcavitiesusingphotoniccrystals AT zhihonghang constructionofopticaltopologicalcavitiesusingphotoniccrystals AT zhihonghang constructionofopticaltopologicalcavitiesusingphotoniccrystals
_version_	1718406297900023808

Construction of Optical Topological Cavities Using Photonic Crystals

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