The progress in chiral light–matter interaction in the quantum regime leads to emergence of
chiral quantum optics and quantum nonreciprocity. Spin‐momentum locking is at the heart of …

Fibre and bulk optical isolators are widely used to stabilize laser cavities by preventing
unwanted feedback. However, their integrated counterparts have been slow to be adopted …

In passive, linear, and monochromatic systems, complete and phase-insensitive combining
of powers carried by waves from several input channels into a single output channel is …

Integrated circulators and isolators are important for developing on-chip optical technologies
such as laser cavities, communication systems and quantum information processors. These …

Temporally varying electromagnetic materials have recently attracted substantial attention
as a platform for building tunable devices, being directly controlled by the developed waves …

Multichannel synchronous amplifications are an inevitable key problem in quantum
communication process, which can broaden the bandwidth of transmitted signals and …

The topology of exceptional points (EPs) has been revealed by taking stationary or
dynamical encircling around them, which induces eigenstate exchange or chiral mode …

Optical resonators enable the generation, manipulation, and storage of electromagnetic
waves. The physics underlying their operation is determined by the interference of …

We present an approach to identifying topological edge states in two dimensional (2D)
problems. Such scattering-immune surface waves are typically identified using the Berry …

Active devices have drawn considerable attention owing to their powerful capabilities to
manipulate electromagnetic waves. Fast and periodic modulation of material properties is …