title: Stripe states in photonic honeycomb ribbon.
abstract: 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.
authors.affiliation: Department of Physics , Chungnam National University , Daejeon 305-764, Republic of Korea.
authors.forename: Sul-Ah
authors.initials: SA
authors.lastname: Park
authors.affiliation: Korea Institute for Advanced Study , Seoul 130-722, Republic of Korea.
authors.forename: Young-Woo
authors.initials: YW
authors.lastname: Son
authors.affiliation: Department of Physics , Chungnam National University , Daejeon 305-764, Republic of Korea.
authors.forename: Kang-Hun
authors.initials: KH
authors.lastname: Ahn
keywords: photonic graphene ribbon; strain effect; stripe state