Figure 2 | Design and optical properties of a BIC zero-index PhC slab. (IMAGE)
Caption
a, Three-dimensional schematic of a zero-index PhC slab and its unit cell, consisting of silicon pillars embedded in silicon dioxide. b, Parameter sweep for design of a BIC zero-index PhC slab. Quality factor of the dipole mode (colour map) and degeneracy of monopole and dipole modes at the centre of the Brillouin zone (white line) as a function of pillar radius and height. The red dot indicates the degeneracy of a monopole mode and a high-Q dipole mode. c, Three-dimensional dispersion surfaces showing the Dirac-cone dispersion corresponding to the optimized parameters at the red dot in (b). d, Effective index and propagation loss of the PhC slab. When the real part of the effective index crosses zero, the loss curve reaches its valley (~0.15 dB/mm), indicating an ultra-low-loss zero index.
Credit
by Tian Dong, Jiujiu Liang, Philip Camayd-Muñoz, Yueyang Liu, Haoning Tang, Shota Kita, Peipei Chen, Xiaojun Wu, Weiguo Chu, Eric Mazur, and Yang Li
Usage Restrictions
None
License
Licensed content