Topological photonics is a rapidly emerging field of research in which geometrical and
topological ideas are exploited to design and control the behavior of light. Drawing …

Non-Hermitian optics is a burgeoning field at the intersection of quantum physics,
electrodynamics, and nanophotonics. It provides a new perspective of the role of gain and …

Integrated photonics enables signal synthesis, modulation and conversion using photonic
integrated circuits (PICs). Many materials have been developed, among which silicon nitride …

Measuring topological invariants is an essential task in characterizing topological phases of
matter. They are usually obtained from the number of edge states due to the bulk-edge …

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 …

High-and ultrahigh-Q whispering-gallery mode resonators have the capability to trap
photons by total internal reflection for a duration ranging from nanoseconds to milliseconds …

Nonreciprocal microwave devices are ubiquitous in radar and radio communication and
indispensable in the readout chains of superconducting quantum circuits. Since they …

Magnetic-free optical non-reciprocal components, such as isolators and circulators, are
highly desirable for on-chip optical signal processing, and quantum networks,. However …

Optical nonlinearity has been widely used to try to produce optical isolators. However, this is
very difficult to achieve due to dynamical reciprocity. Here, we show the use of the chiral …