Stripe states in photonic honeycomb ribbon

作者：Park Sul Ah; Son Young Woo; Ahn Kang Hun^*

来源：Proceedings of the Royal Society A-Mathematical Physical and Engineering Sciences, 2015, 471(2177): 20140765.

DOI：10.1098/rspa.2014.0765

• photonic graphene ribbon
• strain effect
• stripe state

We reveal new stripe states in deformed hexagonal array of photonic wave guides when the array is terminated to have a ribbon-shaped geometry. Unlike the well-known zero energy edge modes of honeycomb ribbon, the new one-dimensional states are shown to originate from high-energy saddle-shaped photonic bands of the ribbon's two-dimensional counterpart. We find that the strain field deforming the ribbon generates pseudo-electric fields in contrast to pseudo-magnetic fields in other hexagonal crystals. Thus, the stripe states experience Bloch oscillation without any actual electric field so that the spatial distributions of stripes have a singular dependence on the strength of the field. The resulting stripe states are located inside the bulk and their positions depend on their energies.

• 出版日期2015-5-8