Formation of nanogratings in a porous glass immersed in water by femtosecond laser irradiation

Yang Liao; Jielei Ni; Lingling Qiao; Min Huang; Yves Bellouard; Koji Sugioka; Ya Cheng

doi:10.1117/12.2076905

4 March 2015 Formation of nanogratings in a porous glass immersed in water by femtosecond laser irradiation

Yang Liao, Jielei Ni, Lingling Qiao, Min Huang, Yves Bellouard, Koji Sugioka, Ya Cheng

Proceedings Volume 9350, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XX; 93500G (2015) https://doi.org/10.1117/12.2076905
Event: SPIE LASE, 2015, San Francisco, California, United States

Abstract

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 hot 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.

Citation Download Citation

Yang Liao, Jielei Ni, Lingling Qiao, Min Huang, Yves Bellouard, Koji Sugioka, and Ya Cheng "Formation of nanogratings in a porous glass immersed in water by femtosecond laser irradiation", Proc. SPIE 9350, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XX, 93500G (4 March 2015); https://doi.org/10.1117/12.2076905

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