Design of full-k-space flat bands in photonic crystals beyond the tight-binding picture

Based on a band engineering method, we propose a theoretical prescription to create a full-k-space flat band in dielectric photonic crystals covering the whole Brillouin Zone. With wave functions distributed in air instead of in the dielectrics, such a flat band represents a unique mechanism for ach...

Descripción completa

Detalles Bibliográficos
Autores principales: Xu, Changqing, Wang, Gang, Hang, Zhi Hong, Luo, Jie, Chan, C. T., Lai, Yun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4676056/
https://www.ncbi.nlm.nih.gov/pubmed/26656882
http://dx.doi.org/10.1038/srep18181
_version_ 1782405103118974976
author Xu, Changqing
Wang, Gang
Hang, Zhi Hong
Luo, Jie
Chan, C. T.
Lai, Yun
author_facet Xu, Changqing
Wang, Gang
Hang, Zhi Hong
Luo, Jie
Chan, C. T.
Lai, Yun
author_sort Xu, Changqing
collection PubMed
description Based on a band engineering method, we propose a theoretical prescription to create a full-k-space flat band in dielectric photonic crystals covering the whole Brillouin Zone. With wave functions distributed in air instead of in the dielectrics, such a flat band represents a unique mechanism for achieving flat dispersions beyond the tight-binding picture, which can enormously reduce the requirement of permittivity contrast in the system. Finally, we propose and numerically demonstrate a unique application based on the full-k-space coverage of the flat band: ultra-sensitive detection of small scatterers.
format Online
Article
Text
id pubmed-4676056
institution National Center for Biotechnology Information
language English
publishDate 2015
publisher Nature Publishing Group
record_format MEDLINE/PubMed
spelling pubmed-46760562015-12-16 Design of full-k-space flat bands in photonic crystals beyond the tight-binding picture Xu, Changqing Wang, Gang Hang, Zhi Hong Luo, Jie Chan, C. T. Lai, Yun Sci Rep Article Based on a band engineering method, we propose a theoretical prescription to create a full-k-space flat band in dielectric photonic crystals covering the whole Brillouin Zone. With wave functions distributed in air instead of in the dielectrics, such a flat band represents a unique mechanism for achieving flat dispersions beyond the tight-binding picture, which can enormously reduce the requirement of permittivity contrast in the system. Finally, we propose and numerically demonstrate a unique application based on the full-k-space coverage of the flat band: ultra-sensitive detection of small scatterers. Nature Publishing Group 2015-12-11 /pmc/articles/PMC4676056/ /pubmed/26656882 http://dx.doi.org/10.1038/srep18181 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Xu, Changqing
Wang, Gang
Hang, Zhi Hong
Luo, Jie
Chan, C. T.
Lai, Yun
Design of full-k-space flat bands in photonic crystals beyond the tight-binding picture
title Design of full-k-space flat bands in photonic crystals beyond the tight-binding picture
title_full Design of full-k-space flat bands in photonic crystals beyond the tight-binding picture
title_fullStr Design of full-k-space flat bands in photonic crystals beyond the tight-binding picture
title_full_unstemmed Design of full-k-space flat bands in photonic crystals beyond the tight-binding picture
title_short Design of full-k-space flat bands in photonic crystals beyond the tight-binding picture
title_sort design of full-k-space flat bands in photonic crystals beyond the tight-binding picture
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4676056/
https://www.ncbi.nlm.nih.gov/pubmed/26656882
http://dx.doi.org/10.1038/srep18181
work_keys_str_mv AT xuchangqing designoffullkspaceflatbandsinphotoniccrystalsbeyondthetightbindingpicture
AT wanggang designoffullkspaceflatbandsinphotoniccrystalsbeyondthetightbindingpicture
AT hangzhihong designoffullkspaceflatbandsinphotoniccrystalsbeyondthetightbindingpicture
AT luojie designoffullkspaceflatbandsinphotoniccrystalsbeyondthetightbindingpicture
AT chanct designoffullkspaceflatbandsinphotoniccrystalsbeyondthetightbindingpicture
AT laiyun designoffullkspaceflatbandsinphotoniccrystalsbeyondthetightbindingpicture

Ejemplares similares