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Researchers from the Laser Processing Group of the IO-CSIC Institute of Optics in Spain report on the application of multi-purpose femtosecond laser interference in high-precision silicon nanostructures. The related research was published in Optics&Laser Technology with the title "Versatile femtosecond laser interference pattern applied to high precision nanostructured of silicon".Highlights:...
Light can calculate functions during propagation and interaction with structured materials, with fast speed and low energy consumption. The use of all optical neural networks for general computing requires an optical activation layer with nonlinear dependence on the input. However, existing optical nonlinear materials either have slow speeds or very weak nonlinearity at the level of natural light ...
When it comes to additive manufacturing, some people may not have heard of it, but when it comes to its other name: 3D printing, no one is unaware.In fact, the name 'additive manufacturing' better illustrates the essence of this processing method. From ancient times to the present, humans have put in great effort to achieve the goal of processing 'raw materials into the shapes we need'. From the S...
Researchers have shown that dissipative Kerr solitons (DKS) can be used to create chip based optical frequency combs with sufficient output power for optical atomic clocks and other practical applications. This progress may lead to chip based instruments being able to perform precise measurements that were previously only possible in a few specialized laboratories.Gr é gory Moille from the ...
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...