Structural modifications of soda‐lime silicate glasses using femtosecond pulse‐laser irradiation

Abstract

Femtosecond pulse laser radiation (250 fs, 1030 nm) of alkali and alkaline earth modified soda-lime silicate (SLS) glasses resulted in densification. The degree of density changes depends on pulse energy and glass-network connectivity. Raman spectroscopy study of the high-frequency region (800-1200 cm −1) confirmed that surface densification was the result of interatomic changes in the distribution of silicon-nonbridging oxygen (NBO) bond lengths and Si-O-Si bond angle distribution (BAD). Modifier valency contributes to structural rigidity and the degree of disorder a glass can incur during the deposition of high-energy laser pulses. Varying soda content caused larger shift in the laser modified Q 3 band position and width compared to the calcium modified system. Increasing laser fluence was found to affect the position of Q 3 Si-O stretching mode as well as the band width, indicating the increased degree of disorder laser pulses induce. These results underscore the role of modifier ions in the laser-induced densification of the SLS glasses. K E Y W O R D S densification, femtosecond laser, Raman, silicate glass How to cite this article: Locker S, Clark JA, Sundaram SK. Structural modifications of soda-lime silicate glasses using femtosecond pulse-laser irradiation. Int J

Geological timescales’ aging effects of lunar glasses

“…For these lunar glassy particles (belongs to silicate glasses), the nanoscale heterogeneity in the rejuvenated samples should be inherited from their melts, of which the chemical heterogeneity is the intrinsic attribute ( 53 ), by heating them up to the supercooled liquid region and cooling them down. More preciously, the rejuvenated samples should have lower network connectivities with more segregated cations and FV and more nonbridging oxygens (NBOs) ( 54 , 55 ) and, hence, more loosely-packed structure than the H-A ones. Such structures might be dynamically favored and inherited from the supercooled liquids by cooling ( 56 ).…”

Structure‐terahertz property relationship in sodium borosilicate glasses

“…In addition to the glass composition, structural units found are influenced by melting conditions, thermal history, temperature, pressure, and postprocessing, for example, thermal treatment or laser irradiation. 15,16 Commercial optical and technical borosilicate glasses include BK7 (Schott), 10,14 Duran (Schott), 13 Borofloat (Schott), 11 Pyrex (Corning), 9,12 or the Vycor process (Corning), 17,18 all of which have been extensively studied for specific applications.…”

“…Desired structures and properties of borosilicate glasses are determined by glass composition and specifically the number of four‐coordinated tetrahedral boron and the connectivity between the borate and silicate subnetworks. In addition to the glass composition, structural units found are influenced by melting conditions, thermal history, temperature, pressure, and postprocessing, for example, thermal treatment or laser irradiation 15,16 . Commercial optical and technical borosilicate glasses include BK7 (Schott), 10,14 Duran (Schott), 13 Borofloat (Schott), 11 Pyrex (Corning), 9,12 or the Vycor process (Corning), 17,18 all of which have been extensively studied for specific applications.…”

Laser-Induced Structural Modification in Calcium Aluminosilicate Glasses Using Molecular Dynamic Simulations

“…The initial structures were created using the correct stoichiometric ratio and experimentally calculated mass densities, seen in Table 1, that produced roughly a 1 million atom sized system of the targeted composition. Each system had an approximate size of 240 × 240 × 240 Å 3 .…”

“…Early studies focused on micromachining surface structures, but quickly evolved into generating 3-dimensional refractive index-modified structures. Femtosecond pulsed laser exposure to materials has become an extensively studied topic [1][2][3][4][5][6][7] . Ultrafast pulsed lasers have undergone significant technological breakthroughs, enabling the development and innovation of materials in diverse fields [8][9][10][11] .…”