24 citations · 44 across the 14 of their papers we have counts for
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Nanocavity Confinement by Orthogonal Valley- and SSH- Topological Interfaces In Glide-Symmetric Photonic Crystal Structures
Takahiro Uemura, Wei Dai, Yuto Moritake +3
Valley photonic crystals enable valley-dependent transport and chirality-selective emission, but incorporating wavelength-scale localization remains challenging. Existing valley-ph…
Transverse spin texture in optical non-Hermitian skin modes
Naoki Ichiji, Issei Takeda, Taiki Yoda +3
In structured electromagnetic fields, polarization textures are often closely linked to the spatial variation of the energy flow. However, this familiar picture has been establishe…
Chiral-Mode Control around a Hermitian Diabolic Point in Discrete Non-Hermitian Coupled Resonators
Kota Yagi, Takahiro Uemura, Yuto Moritake +2
Motivated by the prospect of chiral-mode control in compact photonic systems, we analyze discrete coupled single-mode resonators. Using the minimal three-resonator model, we show t…
Fine Structures of Berry Curvature and Unquantized Valley Chern Numbers in Valley Photonic Crystals
Wei Dai, Taiki Yoda, Yuto Moritake +1
Valley photonics has emerged as a promising platform in topological photonic systems, yet the topological nature of valley-dependent phenomena remains unsettled. Theoretically, int…
Low loss switchable topological photonic crystal enabled by submicron-scale patterning and phase-change of Sb2Se3
Takahiro Uemura, Yuto Moritake, Eiichi Kuramochi +3
Photonic topological insulators (PTIs) offer robust platforms for light manipulation, but reconfigurable control of their topological properties without degrading performance remai…
Observation of non-Hermitian point gap in photonic crystals
Yuto Moritake, Nozomi Ogawa, Issei Takeda +7
Non-Hermitian point gap (NHPG) is a unique phenomenon in non-Hermitian systems and induces non-Hermitian skin effect (NHSE). In photonic crystals, NHPG and the NHSE have previously…
Chiral Diffraction from Aperiodic Monotile Lattice
Yuto Moritake, Masato Takiguchi, Takuma Aihara +1
Aperiodic systems such as quasiperiodic systems exhibit unique properties different from periodic structures. In 2023, Smith et al. discovered a new aperiodic structure: a single-s…
Propagation and circulating modes of reciprocal non-Hermitian skin effect
Issei Takeda, Taiki Yoda, Yuto Moritake +2
The non-Hermitian skin effect (NHSE) is a novel localization phenomenon, in which all bulk states in a non-Hermitian system under certain conditions are localized at the edge of th…
EP restoration and fast-light edge states in photonic crystal waveguide with glide and time reversal symmetry
Takahiro Uemura, Taiki Yoda, Yuto Moritake +3
Exceptional points (EPs) in the propagation states give rise to the emergence of intriguing properties with the divergence of the group velocity. However, there have been no experi…
Photonic topological phase transition induced by material phase transition
Takahiro Uemura, Yuto Moritake, Taiki Yoda +5
Photonic topological insulators (PTIs) have been proposed as an analogy to topological insulators in electronic systems. In particular, two-dimensional PTIs have gained attention f…
High Transmission in 120-degree Sharp Bends of Inversion-symmetric and Inversion-asymmetric Photonic Crystal Waveguides
Wei Dai, Taiki Yoda, Yuto Moritake +3
Bending loss is one of the serious problems for constructing nanophotonic integrated circuits. Recently, many works reported that valley photonic crystals (VPhCs) enable significan…
Optical non-Hermitian skin effect in two-dimensional uniform media
Taiki Yoda, Yuto Moritake, Kenta Takata +3
The non-Hermitian skin effect (NHSE) is a novel localization phenomenon in certain non-Hermitian systems with gain and/or loss. Most of previous works study the non-Hermitian skin…
Exceptional point induced unidirectional radiation from non-Hermitian plasmonic structures
Yuto Moritake, Masaya Notomi
Non-Hermitian (NH) photonics has attracted considerable attention from researchers owing to exotic properties that originate from the parity-time () phase transition…