Nonreciprocal components, such as isolators and circulators, are crucial components for
photonic systems. In this article, we review theoretical and experimental progress toward …

We show that a dynamic gain-loss modulation in an optical structure can lead to a direction-
dependent parity-time (PT) phase transition. The phase transition can be made …

Although traditional quantum-confined nanostructures eg regular quantum wells or quantum
dots have achieved huge success in the field of semiconductor lasers for past decades …

Nowadays, strained quantum structures have been widely used in various light-emitting
devices with a variety of compounds for progressive applications. However, the lattice …

We present an 850-nm vertical-cavity surface-emitting laser (VCSEL) constructed for a wide
operating temperature range from 25° C to− 50° C sub-freezing temperature, demonstrating …

It is well-known that thermal detuning between the gain peak and the cavity mode always
occurs and leads to considerable gain loss in single-frequency laser diodes. For this issue …

We employ complex index modulation to manipulate light scattering in a waveguide and
achieve different kinds of singularities in the system. The singularities refer to poles or zeros …

In the development of semiconductor lasers, it has been a dream all along to simultaneously
obtain extremely wide and uniform gain distribution, because such a gain configuration can …

The present invention is directed to a photonic circuit device for optical gain measurement,
including: a substrate with a photonic circuit; an active gain section; at least two light …

It is well known that the laser diode performance will inevitably deteriorate when the device
is heated. It has been a difficult issue to solve to date. In this letter, we are reporting a new …