Novel Bloch wave excitation platform based on few-layer photonic crystal deposited on D-shaped optical fiber

Abstract With the goal of ultimate control over the light propagation, photonic crystals currently represent the primary building blocks for novel nanophotonic devices. Bloch surface waves (BSWs) in periodic dielectric multilayer structures with a surface defect is a well-known phenomenon, which imp...

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Autores principales:	Esteban Gonzalez-Valencia, Ignacio Del Villar, Pedro Torres
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/28e3c0b04b964e9ea0cc05d830a45a44
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spelling	oai:doaj.org-article:28e3c0b04b964e9ea0cc05d830a45a442021-12-02T15:49:42ZNovel Bloch wave excitation platform based on few-layer photonic crystal deposited on D-shaped optical fiber10.1038/s41598-021-90504-z2045-2322https://doaj.org/article/28e3c0b04b964e9ea0cc05d830a45a442021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90504-zhttps://doaj.org/toc/2045-2322Abstract With the goal of ultimate control over the light propagation, photonic crystals currently represent the primary building blocks for novel nanophotonic devices. Bloch surface waves (BSWs) in periodic dielectric multilayer structures with a surface defect is a well-known phenomenon, which implies new opportunities for controlling the light propagation and has many applications in the physical and biological science. However, most of the reported structures based on BSWs require depositing a large number of alternating layers or exploiting a large refractive index (RI) contrast between the materials constituting the multilayer structure, thereby increasing the complexity and costs of manufacturing. The combination of fiber–optic-based platforms with nanotechnology is opening the opportunity for the development of high-performance photonic devices that enhance the light-matter interaction in a strong way compared to other optical platforms. Here, we report a BSW-supporting platform that uses geometrically modified commercial optical fibers such as D-shaped optical fibers, where a few-layer structure is deposited on its flat surface using metal oxides with a moderate difference in RI. In this novel fiber optic platform, BSWs are excited through the evanescent field of the core-guided fundamental mode, which indicates that the structure proposed here can be used as a sensing probe, along with other intrinsic properties of fiber optic sensors, as lightness, multiplexing capacity and easiness of integration in an optical network. As a demonstration, fiber optic BSW excitation is shown to be suitable for measuring RI variations. The designed structure is easy to manufacture and could be adapted to a wide range of applications in the fields of telecommunications, environment, health, and material characterization.Esteban Gonzalez-ValenciaIgnacio Del VillarPedro TorresNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Esteban Gonzalez-Valencia Ignacio Del Villar Pedro Torres Novel Bloch wave excitation platform based on few-layer photonic crystal deposited on D-shaped optical fiber
description	Abstract With the goal of ultimate control over the light propagation, photonic crystals currently represent the primary building blocks for novel nanophotonic devices. Bloch surface waves (BSWs) in periodic dielectric multilayer structures with a surface defect is a well-known phenomenon, which implies new opportunities for controlling the light propagation and has many applications in the physical and biological science. However, most of the reported structures based on BSWs require depositing a large number of alternating layers or exploiting a large refractive index (RI) contrast between the materials constituting the multilayer structure, thereby increasing the complexity and costs of manufacturing. The combination of fiber–optic-based platforms with nanotechnology is opening the opportunity for the development of high-performance photonic devices that enhance the light-matter interaction in a strong way compared to other optical platforms. Here, we report a BSW-supporting platform that uses geometrically modified commercial optical fibers such as D-shaped optical fibers, where a few-layer structure is deposited on its flat surface using metal oxides with a moderate difference in RI. In this novel fiber optic platform, BSWs are excited through the evanescent field of the core-guided fundamental mode, which indicates that the structure proposed here can be used as a sensing probe, along with other intrinsic properties of fiber optic sensors, as lightness, multiplexing capacity and easiness of integration in an optical network. As a demonstration, fiber optic BSW excitation is shown to be suitable for measuring RI variations. The designed structure is easy to manufacture and could be adapted to a wide range of applications in the fields of telecommunications, environment, health, and material characterization.
format	article
author	Esteban Gonzalez-Valencia Ignacio Del Villar Pedro Torres
author_facet	Esteban Gonzalez-Valencia Ignacio Del Villar Pedro Torres
author_sort	Esteban Gonzalez-Valencia
title	Novel Bloch wave excitation platform based on few-layer photonic crystal deposited on D-shaped optical fiber
title_short	Novel Bloch wave excitation platform based on few-layer photonic crystal deposited on D-shaped optical fiber
title_full	Novel Bloch wave excitation platform based on few-layer photonic crystal deposited on D-shaped optical fiber
title_fullStr	Novel Bloch wave excitation platform based on few-layer photonic crystal deposited on D-shaped optical fiber
title_full_unstemmed	Novel Bloch wave excitation platform based on few-layer photonic crystal deposited on D-shaped optical fiber
title_sort	novel bloch wave excitation platform based on few-layer photonic crystal deposited on d-shaped optical fiber
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/28e3c0b04b964e9ea0cc05d830a45a44
work_keys_str_mv	AT estebangonzalezvalencia novelblochwaveexcitationplatformbasedonfewlayerphotoniccrystaldepositedondshapedopticalfiber AT ignaciodelvillar novelblochwaveexcitationplatformbasedonfewlayerphotoniccrystaldepositedondshapedopticalfiber AT pedrotorres novelblochwaveexcitationplatformbasedonfewlayerphotoniccrystaldepositedondshapedopticalfiber
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Novel Bloch wave excitation platform based on few-layer photonic crystal deposited on D-shaped optical fiber

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