Nearly one century after the birth of quantum mechanics, parity–time symmetry is
revolutionizing and extending quantum theories to include a unique family of non-Hermitian …

Optical biosensors are frontrunners for the rapid and real-time detection of analytes,
particularly for low concentrations. Among them, whispering gallery mode (WGM) resonators …

The brightness of doped luminescent materials is usually limited by the ubiquitous
concentration quenching phenomenon resulting in an intractable tradeoff between internal …

We propose and numerically analyze a multiple Fano resonance device with high quality (Q)
factor and high modulation depth based on a metal-insulator-metal (MIM) waveguide …

In the present paper, we demonstrate the first outdoor free-space optical communication
(FSOC) system with real-time video transmission in a 2-μm-band with a state-of-the-art data …

We have proposed and demonstrated a Q-switched Thulium doped fibre laser (TDFL) with a
'Yin-Yang'all-fibre cavity scheme based on a combination of nonlinear optical loop mirror …

The synergetic use of gain and loss in parity-time symmetric coupled resonators has been
shown to lead to single-mode lasing operation. However, at the corresponding resonance …

We develop a general formalism to study laser operation in active microring resonators
supporting two counterpropagating modes. Our formalism is based on the coupled-mode …

We study light transmission and reflection from an integrated microresonator device, formed
by a circular microresonator coupled to a bus waveguide, with an embedded S-shaped …

The gain-bandwidth product is a fundamental figure of merit that restricts the operation of
optical amplifiers. Here, we introduce a design paradigm based on exceptional points, which …