Optical microcombs represent a new paradigm for generating laser frequency combs based
on compact chip-scale devices, which have underpinned many modern technological …

As a fundamental optical approach to interferometry, Sagnac interference has been widely
used for reflection manipulation, precision measurements, and spectral engineering in …

Integrated photonics will play a key role in quantum systems as they grow from few-qubit
prototypes to tens of thousands of qubits. The underlying optical quantum technologies can …

Low-loss photonic integrated circuits and microresonators have enabled a wide range of
applications, such as narrow-linewidth lasers and chip-scale frequency combs. To translate …

The commercial success of radio-frequency acoustic filters in wireless communication
systems has launched aluminum nitride (AlN) as one of the most widely used …

The ability to amplify optical signals is of pivotal importance across science and technology
typically using rare-earth-doped fibres or gain media based on III–V semiconductors. A …

Optical neural networks (ONNs), or optical neuromorphic hardware accelerators, have the
potential to dramatically enhance the computing power and energy efficiency of mainstream …

Nonlinear wave mixing in optical microresonators offers new perspectives to generate
compact optical-frequency microcombs, which enable an ever-growing number of …

Integrated photonics at near-IR (NIR) wavelengths currently lacks high bandwidth and low-
voltage modulators, which add electro-optic functionality to passive circuits. Here, integrated …

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 …