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With the rise of clean energy and the enhancement of environmental awareness, thin film solar cells are gradually replacing traditional silicon-based solar cells as an efficient energy conversion device.However, to achieve efficient solar cell conversion rates, the key is to ensure that thin film solar cells have clear edges and maximize light absorption. In this regard, the unique advantages of h...
On October 3rd, the 2023 Nobel Prize in Physics was announced, recognizing scientists who have studied attosecond physics, marking the beginning of the attosecond era for humanity.At present, China's first attosecond laser device, the "Advanced attosecond Laser Facility", is being prepared and built in Dongguan, Guangdong, providing strong impetus for breakthroughs in multiple major basic scientif...
1. Research backgroundDirected energy deposition (DED), as an efficient and economical technology in the field of additive manufacturing (AM), is widely used in the manufacturing of metal materials. However, its high heating and cooling rates, as well as significant temperature gradients, often lead to rapid solidification, forming cross layer columnar grains and internal defects, seriously affect...
A team of researchers in Berkeley Lab's Accelerator Technology and Applied Physics (ATAP) division has developed a new technique that combines fiber lasers of different wavelengths to generate ultra-short laser pulses. The research is in the journal Optics Letters.This work could advance the development of laser plasma accelerators (LPA), which have the potential to push the frontiers of high-en...
Just ten years ago, fiber laser cutting machines were considered experts in thin plates. The stores quickly realized that they had to invest in them to compete, at least by reducing their instrument materials. For high-quality sheet metal cutting, CO2 laser is still the way to go. Of course, fiber lasers can cut thicker blanks, but the quality is not very good, and their speed advantage almost dis...