2014/11/10 by Yang Liao, Liao, Yang, Jielei Ni +11
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Glass properties and applications #Laser Material Processing Techniques #Laser-induced spectroscopy and plasma #Optics (physics.optics) #physics.optics
paper · pdf · doi:10.48550/arxiv.1411.2470
21 pages, 6 figures
arxiv created 2014/11/10 · openalex publication_date 2014/11/10 · arxiv updated 2014/11/11 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Irradiation of intense ultrafast laser pulses in glasses can lead to formation of nanogratings whose periods are significantly smaller than the incident irradiation wavelength. The mechanism of the exotic phenomenon is still under debate. Here, we access the snapshots of morphologies in the laser affected regions in a porous glass which reveal the evolution of the formation of nanogratings with increasing number of laser pulses. Combined with further theoretical analyses, our observation provides important clues which suggest that excitation of standing plasma waves at the interfaces between areas modified and unmodified by the femtosecond laser irradiation plays a crucial role for promoting the growth of periodic nanogratings. The finding indicates that the formation of volume nanogratings induced by irradiation of femtosecond laser pulses is initiated with a mechanism similar to the formation of surface nanoripples.