485 citations · 897 across the 4 of their papers we have counts for
6 papers
Valley-dependent Corner States in Honeycomb Photonic Crystal without Inversion Symmetry
Huyen Thanh Phan, Feng Liu, Katsunori Wakabayashi
We study topological states of honeycomb photonic crystals in absence of inversion symmetry using plane wave expansion and finite element methods. The breaking of inversion symmetr…
Higher-order Quantum Spin Hall Effect of Light
Biye Xie, Guangxu Su, Hong-Fei Wang +7
Band topology and related spin (or pseudo-spin) physics of photons provide us with a new dimension for manipulating light, which is potentially useful for information communication…
Dimensional Crossover of Topological Edge States in Su-Schrieffer-Heeger Model
Daichi Obana, Feng Liu, Katsunori Wakabayashi
Su-Schrieffer-Heeger (SSH) model on two-dimensional square lattice exhibits a topological phase transition, which is related to the Zak phase determined by bulk band topology. The…
Photonic crystal nanocavity based on a topological corner state
Yasutomo Ota, Feng Liu, Ryota Katsumi +4
Topological phonics has emerged as a novel approach to engineer the flow of light and provides unprecedented means for developing diverse photonic elements, including robust optica…
Helical Topological Edge States in a Quadrupole Phase
Feng Liu, Hai-Yao Deng, Katsunori Wakabayashi
Topological electric quadrupole is a recently proposed concept that extends the theory of electric polarization of crystals to higher orders. Such a quadrupole phase supports topol…
Novel Topological Phase with Zero Berry Curvature
Feng Liu, Katsunori Wakabayashi
We present a two-dimensional (2D) lattice model that exhibits a nontrivial topological phase in the absence of the Berry curvature. Instead, the Berry connection provides the topol…