Exceptional points (EPs) arising in non-Hermitian systems have led to a variety of intriguing
wave phenomena, and have been attracting increased interest in various physical platforms …

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

Carbon dots (CDs) are a new solution-processable laser material. They offer advantages of
non-toxicity, low cost, and high stability, making them attractive for the sustainable …

Exploiting the interplay between gain, loss and the coupling strength between different
optical components creates a variety of new opportunities in photonics to generate, control …

The term whispering gallery mode (WGM) was first introduced to describe the curvilinear
propagation of sound waves under a cathedral dome. The physical concept has now been …

Exceptional points are spectral singularities in open quantum and wave systems that exhibit
a strong spectral response to perturbations. This feature can be exploited for a new …

Soliton frequency combs generate equally-distant frequencies, offering a powerful tool for
fast and accurate measurements over broad spectral ranges. The generation of solitons in …

High quality-factor (Q) optical resonators are a key component for ultra-narrow linewidth
lasers, frequency stabilization, precision spectroscopy and quantum applications. Integration …

Sensors play an important part in many aspects of daily life such as infrared sensors in
home security systems, particle sensors for environmental monitoring and motion sensors in …

Non-Hermitian degeneracies, also known as exceptional points, have recently emerged as
a new way to engineer the response of open physical systems, that is, those that interact …