Flatness and boundness of photonic drumhead surface state in a metallic lattice

Abstract Nodal chain (NC) semi-metals have the degeneracy of interlacing rings in their band structure in momentum space. With the projection of degenerate rings towards crystal boundaries, there is a special type of surface dispersion appearing at surface Brillouin zone and termed drumhead surface...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Yu Wang, Xiaoxi Zhou, Shanshan Li, Wenya Zhang, Chuandeng Hu, Weixin Lu, Bo Hou
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2021
Materias:
R
Q
Acceso en línea:https://doaj.org/article/6c49341b8e804fe0ade6725089b15e3f
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:doaj.org-article:6c49341b8e804fe0ade6725089b15e3f
record_format dspace
spelling oai:doaj.org-article:6c49341b8e804fe0ade6725089b15e3f2021-12-02T17:32:57ZFlatness and boundness of photonic drumhead surface state in a metallic lattice10.1038/s41598-021-88004-12045-2322https://doaj.org/article/6c49341b8e804fe0ade6725089b15e3f2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88004-1https://doaj.org/toc/2045-2322Abstract Nodal chain (NC) semi-metals have the degeneracy of interlacing rings in their band structure in momentum space. With the projection of degenerate rings towards crystal boundaries, there is a special type of surface dispersion appearing at surface Brillouin zone and termed drumhead surface state (DSS). Previously, experimental investigations on photonic NC and DSS have been done on metallic photonic crystals at microwave frequencies. However, far-field detection of DSS and its coupling to radiative modes in free space have not been studied. In the work, we analyze the photonic DSS in a metallic lattice by angle-resolved far-field reflection measurement and numerical simulation at terahertz (THz) frequencies, and reveal its flatness and boundness in band structure, even in the radiation continuum. Particularly, the DSS band can be tuned being from negatively dispersive via flat to positively dispersive by a single surface parameter, and the DSS at Γ point in surface Brillouin zone is in fact a symmetry-protected bound state in the continuum. Our results might have some potential applications towards THz photonics.Yu WangXiaoxi ZhouShanshan LiWenya ZhangChuandeng HuWeixin LuBo HouNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Yu Wang
Xiaoxi Zhou
Shanshan Li
Wenya Zhang
Chuandeng Hu
Weixin Lu
Bo Hou
Flatness and boundness of photonic drumhead surface state in a metallic lattice
description Abstract Nodal chain (NC) semi-metals have the degeneracy of interlacing rings in their band structure in momentum space. With the projection of degenerate rings towards crystal boundaries, there is a special type of surface dispersion appearing at surface Brillouin zone and termed drumhead surface state (DSS). Previously, experimental investigations on photonic NC and DSS have been done on metallic photonic crystals at microwave frequencies. However, far-field detection of DSS and its coupling to radiative modes in free space have not been studied. In the work, we analyze the photonic DSS in a metallic lattice by angle-resolved far-field reflection measurement and numerical simulation at terahertz (THz) frequencies, and reveal its flatness and boundness in band structure, even in the radiation continuum. Particularly, the DSS band can be tuned being from negatively dispersive via flat to positively dispersive by a single surface parameter, and the DSS at Γ point in surface Brillouin zone is in fact a symmetry-protected bound state in the continuum. Our results might have some potential applications towards THz photonics.
format article
author Yu Wang
Xiaoxi Zhou
Shanshan Li
Wenya Zhang
Chuandeng Hu
Weixin Lu
Bo Hou
author_facet Yu Wang
Xiaoxi Zhou
Shanshan Li
Wenya Zhang
Chuandeng Hu
Weixin Lu
Bo Hou
author_sort Yu Wang
title Flatness and boundness of photonic drumhead surface state in a metallic lattice
title_short Flatness and boundness of photonic drumhead surface state in a metallic lattice
title_full Flatness and boundness of photonic drumhead surface state in a metallic lattice
title_fullStr Flatness and boundness of photonic drumhead surface state in a metallic lattice
title_full_unstemmed Flatness and boundness of photonic drumhead surface state in a metallic lattice
title_sort flatness and boundness of photonic drumhead surface state in a metallic lattice
publisher Nature Portfolio
publishDate 2021
url https://doaj.org/article/6c49341b8e804fe0ade6725089b15e3f
work_keys_str_mv AT yuwang flatnessandboundnessofphotonicdrumheadsurfacestateinametalliclattice
AT xiaoxizhou flatnessandboundnessofphotonicdrumheadsurfacestateinametalliclattice
AT shanshanli flatnessandboundnessofphotonicdrumheadsurfacestateinametalliclattice
AT wenyazhang flatnessandboundnessofphotonicdrumheadsurfacestateinametalliclattice
AT chuandenghu flatnessandboundnessofphotonicdrumheadsurfacestateinametalliclattice
AT weixinlu flatnessandboundnessofphotonicdrumheadsurfacestateinametalliclattice
AT bohou flatnessandboundnessofphotonicdrumheadsurfacestateinametalliclattice
_version_ 1718380125525901312