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Researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) and Vienna University of Technology (TU Wien) have invented a new type of tunable semiconductor laser that shows smooth, reliable, wide-range wavelength tuning in a simple, chip-sized design.Tunable lasers are integral to many technologies, from high-speed telecommunications to medical diagnostics to safet...
Two dimensional transition metal chalcogenides have multi valley structures in their energy bands, giving them electron valley degrees of freedom, making them an ideal platform for studying multi body interactions. As the main mechanism of valley depolarization, the valley scattering process of free electrons or bound excitons is crucial for exploring excited state electron phonon interactions and...
With the explosive growth of data traffic, the market is extremely eager for hybrid photonic integrated circuits that can combine various optical components on a single chip.Silicon is an excellent material for photonic integrated circuits (PICs), but achieving high-performance laser sources in silicon still poses challenges. The monolithic integration of III-V quantum dot (QD) lasers on silicon i...
Hyperspectral imaging technology is a highly anticipated innovation in the field of science and engineering today. It not only integrates spectroscopy and imaging technology, but also has wide applications in various industries and research fields. This article will delve into the basic principles, working mechanisms, and applications of hyperspectral imaging in different fields.Introduction to hy...
Set up a dual comb fiber laser oscillator, external pulse combination, and real-time detection.In innovative methods for controlling ultra short laser flashes, researchers from Bayreuth University and Konstanz University are using soliton physics and two pulse combs in a single laser. This method has the potential to greatly accelerate and simplify laser applications.Traditionally, the pulse inter...