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Twist-induced guidance in coreless photonic crystal fiber: A helical channel for light

A century ago, Einstein proposed that gravitational forces were the result of the curvature of space-time and predicted that light rays would deflect when passing a massive celestial object. We report that twisting the periodically structured “space” within a coreless photonic crystal fiber creates...

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Autores principales: Beravat, Ramin, Wong, Gordon K. L., Frosz, Michael H., Xi, Xiao Ming, Russell, Philip St.J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5262443/
https://www.ncbi.nlm.nih.gov/pubmed/28138531
http://dx.doi.org/10.1126/sciadv.1601421
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author Beravat, Ramin
Wong, Gordon K. L.
Frosz, Michael H.
Xi, Xiao Ming
Russell, Philip St.J.
author_facet Beravat, Ramin
Wong, Gordon K. L.
Frosz, Michael H.
Xi, Xiao Ming
Russell, Philip St.J.
author_sort Beravat, Ramin
collection PubMed
description A century ago, Einstein proposed that gravitational forces were the result of the curvature of space-time and predicted that light rays would deflect when passing a massive celestial object. We report that twisting the periodically structured “space” within a coreless photonic crystal fiber creates a helical channel where guided modes can form despite the absence of any discernible core structure. Using a Hamiltonian optics analysis, we show that the light rays follow closed spiral or oscillatory paths within the helical channel, in close analogy with the geodesics of motion in a two-dimensional gravitational field. The mode diameter shrinks, and its refractive index rises, as the twist rate increases. The birefringence, orbital angular momentum, and dispersion of these unusual modes are explored.
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spelling pubmed-52624432017-01-30 Twist-induced guidance in coreless photonic crystal fiber: A helical channel for light Beravat, Ramin Wong, Gordon K. L. Frosz, Michael H. Xi, Xiao Ming Russell, Philip St.J. Sci Adv Research Articles A century ago, Einstein proposed that gravitational forces were the result of the curvature of space-time and predicted that light rays would deflect when passing a massive celestial object. We report that twisting the periodically structured “space” within a coreless photonic crystal fiber creates a helical channel where guided modes can form despite the absence of any discernible core structure. Using a Hamiltonian optics analysis, we show that the light rays follow closed spiral or oscillatory paths within the helical channel, in close analogy with the geodesics of motion in a two-dimensional gravitational field. The mode diameter shrinks, and its refractive index rises, as the twist rate increases. The birefringence, orbital angular momentum, and dispersion of these unusual modes are explored. American Association for the Advancement of Science 2016-11-25 /pmc/articles/PMC5262443/ /pubmed/28138531 http://dx.doi.org/10.1126/sciadv.1601421 Text en Copyright © 2016, The Authors http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Beravat, Ramin
Wong, Gordon K. L.
Frosz, Michael H.
Xi, Xiao Ming
Russell, Philip St.J.
Twist-induced guidance in coreless photonic crystal fiber: A helical channel for light
title Twist-induced guidance in coreless photonic crystal fiber: A helical channel for light
title_full Twist-induced guidance in coreless photonic crystal fiber: A helical channel for light
title_fullStr Twist-induced guidance in coreless photonic crystal fiber: A helical channel for light
title_full_unstemmed Twist-induced guidance in coreless photonic crystal fiber: A helical channel for light
title_short Twist-induced guidance in coreless photonic crystal fiber: A helical channel for light
title_sort twist-induced guidance in coreless photonic crystal fiber: a helical channel for light
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5262443/
https://www.ncbi.nlm.nih.gov/pubmed/28138531
http://dx.doi.org/10.1126/sciadv.1601421
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