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Semiconductor quantum dots have the advantages of high quantum yield, narrow emission spectrum, and compatibility with solution processes. They have shown broad application prospects and enormous economic value in the field of optoelectronic materials and devices, and related research has won the Nobel Prize in Chemistry in 2023.Compared with traditional II-VI and III-V quantum dots (such as CdSe,...
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...
Us researchers report 8.1 μm wavelength quantum cascade laser (QCL) grown on silicon (Si) by MOCVD [S. Xu et al., Applications. Physics Letters, v123, p031110, 2023]. "There are no previous reports of QCL growth on silicon substrates by metal-organic chemical vapor deposition (MOCVD)," commented the team from the University of Wisconsin-Madison, the University of Illinois at Urbana-Champaign an...
In the interaction between ultra short and ultra strong laser and matter, electrons with short pulse width and high energy are generated, commonly referred to as "hot electrons". The generation and transport of hot electrons is one of the important fundamental issues in high-energy density physics of lasers. Superhot electrons can excite a wide range of ultrafast electromagnetic radiation, as well...
On May 30th, Jenoptik announced on its official WeChat account that after approximately two and a half years of construction, its new factory in Dresden, Germany, with an investment of nearly 100 million euros, has officially opened. This is the largest single investment project in Jenoptik's recent history.Jenoptik President and CEO Dr. Stefan Traeger stated that this new factory will make Dresde...