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arXiv · 2108.00255

Possible Realization of Optical Quadratic and Dirac Points in Woodpile Photonic Crystals

Hai-Xiao Wang·Yige Chen·Guang-Yu Guo·Hae-Young Kee·Jian-Hua Jiang
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Abstract

The simulation of fermionic relativistic physics, e.g., Dirac and Weyl physics, has led to the discovery of many unprecedented phenomena in photonics, of which the optical-frequency realization is, however, still challenging. Here, surprisingly, we discover that the woodpile photonic crystals commonly used for optical frequency applications host exotic fermion-like relativistic degeneracies: a Dirac nodal line and a fourfold quadratic point, as protected by the nonsymmorphic crystalline symmetry. Deforming the woodpile photonic crystal leads to the emergence of type-II Dirac points from the fourfold quadratic point. Such type-II Dirac points can be detected by its anomalous refraction property which is manifested as a giant birefringence in a slab setup. Our findings provide a promising route towards 3D optical Dirac physics in all-dielectric photonic crystals.

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Hai-Xiao Wang, Yige Chen, Guang-Yu Guo, Hae-Young Kee, Jian-Hua Jiang. 2021-07-31. Possible Realization of Optical Quadratic and Dirac Points in Woodpile Photonic Crystals. https://doi.org/10.1364/oe.456614

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