Weyl points in photonic-crystal superlattices

Bravo-Abad, Jorge and Lu, Ling and Fu, Liang and Buljan, Hrvoje and Soljačić, Marin (2015) Weyl points in photonic-crystal superlattices. 2D Materials, 2 (3). pp. 34013-7. ISSN 2053-1583

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We show that Weyl points can be realized in all-dielectric superlattices based on three- dimensional (3D) layered photonic crystals. Our approach is based on creating an inversion- breaking array of weakly-coupled planar defects embedded in a periodic layered structure with a large omnidirectional photonic band gap. Using detailed band structure calculations and tight- binding theory arguments, we demonstrate that this class of layered systems can be tailored to display 3D linear point degeneracies between two photonic bands, without breaking time- reversal symmetry and using a configuration that is readily-accessible experimentally. These results open new prospects for the observation of Weyl points in the near-infrared and optical regimes and for the application of Weyl-physics in integrated photonic devices.

Item Type: Article
Keywords: Weyl points ; three-dimensional photonic crystals ; topological photonic
Date: 2015
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2015 IOP Publishing. Received 24 April 2015. Accepted 21 July 2015. Published 19 August 2015.
Divisions: Faculty of Science > Department of Physics
Publisher: IOP Publishing
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 06 Sep 2017 14:57
Last Modified: 07 Sep 2017 12:46
URI: http://digre.pmf.unizg.hr/id/eprint/5547

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