Investigation of femtosecond laser induced ripple formation on copper for varying incident angle

Femtosecond laser induced surface nanostructures on copper

This study demonstrated circular surface nanostructures and femtosecond laser-induced periodic surface structures (FLIPSS) for copper produced by a Ti:Sapphire femtosecond laser beam of wavelength 800 nm and duration 120 fs. The circular textured nanostrucres could be created by a single laser pulse. The nanostructures in the center of the heated spot diminish as laser fluence increases and a c...

Femtosecond laser-induced formation of spikes on silicon

Femtosecond laser-induced microwelding of silver and copper.

Femtosecond (fs) laser irradiation has been shown to be effective for welding transparent materials and for transparent materials to metals. However, to date there is little work regarding similar applications in welding/bonding of metals. In this article, we for the first time to the best of our knowledge report on fs laser-induced microwelding of Ag microwires and Cu substrates. The influence...

Two-color photoemission produced by femtosecond laser pulses on copper

Single-color illumination of a copper surface by a red or an ultraviolet femtosecond laser pulse yields a threephoton (red) or a two-photon (UV) photoemission process. A multicolor, multiphoton process is generated when the red and the UV pulses overlap both in space and in time on the photocathode. It is shown that this emission process results from the absorption by an electron of one red and...

Time-resolved measurement of single pulse femtosecond laser-induced periodic surface structure formation Time-resolved measurement of single pulse femtosecond laser-induced periodic surface structure formation

Time-resolved measurement of single pulse femtosecond laser-induced periodic surface structure formation K. R. P. Kafka, D. R. Austin, H. Li, A. Yi, J. Cheng, and E. A. Chowdhury Department of Physics, The Ohio State University, 191 W. Woodruff Ave, Columbus, OH 43210, USA Department of Integrated Systems Engineering, The Ohio State University, 1971 Neil Ave Columbus, OH 43210 Harbin Institute ...