Shchedrina N, Cavillon M, Ari J, Ollier N, Lancry M. Impact of Glass Free Volume on Femtosecond Laser-Written Nanograting Formation in Silica Glass.
MATERIALS (BASEL, SWITZERLAND) 2024;
17:502. [PMID:
38276441 PMCID:
PMC10820044 DOI:
10.3390/ma17020502]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 01/14/2024] [Accepted: 01/18/2024] [Indexed: 01/27/2024]
Abstract
In this study, we investigate the effects of densification through high pressure and temperature (up to 5 GPa, 1000 °C) in the making of nanogratings in pure silica glass, inscribed with femtosecond laser. The latter were monitored through retardance measurements using polarized optical microscopy, and their internal structure was observed under scanning electron microscopy. We reveal the difficulty in making nanogratings in densified silica glasses. Based on this observation, we propose that free volume may be a key precursor to initiate nanograting formation.
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