Dispersion near the triple nexus points and nodal lines (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Dispersion near the triple nexus points and nodal lines

Caption

a, 3D band structure of the PhC in Fig. 1 on the high symmetry plane k_y=0 illustrating that the 1st mirror-even band (magenta cone) intersects with a pair of mirror -odd bands (light blue surfaces) along two red nodal rings, and the two odd bands coincide along the blue Kramers-like NL. The pair of orange dots shows the nexus points of the 3 NLs. b, c, and d, Zoomed-in band structures around the NP in three sections, respectively. e, Iso-frequency surfaces around the NP where the black tangential lines are obtained from the 1st-order k?p Hamiltonian. f, Band structure of a PhC with broken hidden symmetry.

Credit

by Zhongfei Xiong, Ruo-Yang Zhang2, Rui Yu, C. T. Chan, Yuntian Chen

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