Ultrafast Laser Welding of Silicon

While ultrafast laser welding is a well-established technique for bonding materials, it is not applicable to the silicon–silicon configuration because of nonlinear propagation effects. In article number 2200300, Maxime Chambonneau and co-workers solve this issue by relocating the filaments at the interface where the absorption is exalted with a metallic nanolayer, yielding remarkable shear joining strength values (>4 MPa).