Controlling Directionality and Dimensionality of Radiation by Perturbing Separable Bound States in the Continuum

Rivera, Nicolas and Hsu, Chia Wei and Zhen, Bo and Buljan, Hrvoje and Joannopoulos, John D. and Soljačić, Marin (2016) Controlling Directionality and Dimensionality of Radiation by Perturbing Separable Bound States in the Continuum. Scientific Reports, 6. pp. 33394-7. ISSN 2045-2322

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Abstract

A bound state in the continuum (BIC) is an unusual localized state that is embedded in a continuum of extended states. Here, we present the general condition for BICs to arise from wave equation separability. Then we show that by exploiting perturbations of certain symmetry such BICs can be turned into resonances that radiate with a tailorable directionality and dimensionality. Using this general framework, we construct new examples of separable BICs and resonances that can exist in optical potentials for ultracold atoms, photonic systems, and systems described by tight binding. Such resonances with easily reconfigurable radiation allow for applications such as the storage and release of waves at a controllable rate and direction, as well systems that switch between different dimensions of confinement.

Item Type: Article
Date: 19 September 2016
Subjects: NATURAL SCIENCES > Physics
Additional Information: © The Author(s) 2016. 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/ . Received: 26 May 2016. Accepted: 25 August 2016. Published: 19 September 2016.
Divisions: Faculty of Science > Department of Physics
Publisher: Nature Publishing Group
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 02 Nov 2017 15:17
Last Modified: 02 Dec 2017 16:37
URI: http://digre.pmf.unizg.hr/id/eprint/5654

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