Chinese Optics Letters, 2015, 13 (7): 071001, Published Online: Sep. 14, 2018
Femtosecond laser induced periodic large-scale surface structures on metals Download: 782次
Abstract
The periodic ripple structures on wolfram and titanium surfaces are induced experimentally by linear polarized femtosecond laser pulses at small incident angles. The structural features show a material difference in the s - and p -polarized laser irradiation. The interspace between the ripples increases significantly for p -polarized laser irradiation when it exceeds a threshold angle, and the ripples’ periodicities are larger than the wavelength of the incident p -polarized femtosecond laser; however, no significant change in the period of the ripples is observed with increasing incident angle for s -polarized laser irradiation. To explain these phenomena we propose a resonant absorption mechanism, by which the experimental observations can be interpreted.
Xiangming Dong, Haiying Song, Shibing Liu. Femtosecond laser induced periodic large-scale surface structures on metals[J]. Chinese Optics Letters, 2015, 13(7): 071001.