1.3k citations · 4.9k across the 68 of their papers we have counts for
69 papers
Microwave hinge states in a simple-cubic-lattice photonic crystal insulator
Shun Takahashi, Yuya Ashida, Huyen Thanh Phan +4
We numerically and experimentally demonstrated a higher-order topological state in a three-dimensional (3D) photonic crystal (PhC) with a complete photonic bandgap. Two types of cu…
Symmetry manipulation of nonlinear optical effect for metallic TMDC
Ren Habara, Katsunori Wakabayashi
Nonlinear optical (NLO) effect plays a crucial role to engineer optical angular frequency and symmetry of electronic system. Metallic transition-metal dichalcogenide (TMDC) is one…
Enhanced valley polarization of graphene on hBN under circularly polarized light irradiation
Keisuke Nakagahara, Katsunori Wakabayashi
Graphene on hBN (G/hBN) has a long period moiré superstructure owing to the lattice mismatch between two materials. Long periodic potential caused by the moiré superstructure induc…
Nonlinear optical Hall effect of few-layered NbSe2
Ren Habara, Katsunori Wakabayashi
NbSe is one of metallic two-dimensional (2D) transition-metal dichalcogenide (TMDC) materials. Because of broken crystal inversion symmetry, large spin splitting is induced by…
Additive rule of real and reciprocal space topologies at disclinations
Qinghua He, Jinhua Sun, Hai-Yao Deng +2
Topological materials are renowned for their ability to harbor states localized at their peripheries, such as surfaces, edges, and corners. Accompanying these states, fractional ch…
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…