Molding the flow of light—whether confined to localized regions or propagating in free space—remains crucial for modern integrated photonics. The advancement of the multi-channel, programmable optical ...

Topological physics, which focuses on physical quantities that remain invariant under deformations, has garnered widespread interest in different areas of physics—photonics, quantum computing, ...

Non-Abelian photonic integrated circuit developed in this study, in which couplings between optical devices are implemented for the first time in the form of fully programmable matrix-valued ...

A collaborating team of NTT Corporation (NTT) and Tokyo Institute of Technology (Prof. Masaya Notomi in Physics Department) has succeeded in achieving photonic topological phase transition by material ...

In brief: A group of researchers has demonstrated a compact optical device that switches between two distinct topological states of light, marking a key step toward terahertz communication systems ...