activity
20082026
most citedUltrafast and energy-efficient all-optical switching with graphene-loaded deep-subwavelength plasmonic waveguides

429 citations · 2.3k across the 31 of their papers we have counts for

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physics.optics2026

Mid-infrared spontaneous and stimulated emission dynamics in black phosphorus

Hisashi Sumikura, Akihiko Shinya, Masaya Notomi

Black phosphorus (BP) has attracted attention as a light-emitting layered semiconductor for mid-infrared (MIR) photonics owing to its direct and thickness-tunable bandgap energy, h…

physics.optics2023

Vector beam generation from standing hollow GaN nanowire lasers on sapphire substrate

Masato Takiguchi, Sylvain Sergent, Benjamin Damilano +9

We fabricated GaN based hollow nanowires standing upright on a sapphire substrate by the sublimation method and found that they exhibit laser oscillation at room temperature. These…

physics.optics2023★ 14 cited

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…

physics.optics2023★ 4 cited

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…

physics.optics2023★ 3 cited

Improved design and experimental demonstration of ultrahigh-Q C-symmetric H1 hexapole photonic crystal nanocavities

Kenta Takata, Eiichi Kuramochi, Akihiko Shinya +1

An H1 photonic crystal nanocavity is based on a single point defect and has eigenmodes with a variety of symmetric features. Thus, it is a promising building block for photonic tig…

physics.optics2021

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…