Visible-Terahertz Refractive Indices Correlation in Sodium Borosilicate Glasses

A perspective on recent developments of structure‐terahertz property relationships in glasses

“…With the measurement of visible refractive indices, in tandem with THz refractive indices, we have reported visible-THz refractive indices correlations for our glasses. 14 Refractive indices at THz frequencies are higher than those at visible frequencies due to the ionic polarization mechanism contributing to the total polarization at THz frequencies. 5 Our results show this holds true for our borosilicate glasses across both visible and THz regions.…”

“…12 Recently, we have completed our comprehensive study of glass structure-THz property relationships for the borosilicate, tellurite, and chalcogenide glass families. [13][14][15][16][17][18][19] Figure 2 shows the refractive index and absorption coefficient across the THz bandwidth and the 0.5 THz absorption coefficient and refractive index correlation for these glasses. 18 This data demonstrates that glass chemistry, composition, and structure impact resulting properties at THz frequencies, as it would impact any other properties, that is, optical (at visible frequencies), mechanical, and thermal.…”

“…Figure 4 shows the refractive indices at visible, for example, 0.589 μm, and THz, for example, 0.5 THz, frequencies for our sodium borosilicate glasses with overlayed silicate glass data by Naftaly et al, 5,6,9 and the inset are the refractive indices of borosilicate glasses we studied. 14 The authors examined the visible-THz refractive index correlation for commercially produced B 270, BK7, Pyrex, N-Zk7, SF series, and SK10 silicate glasses. Our borosilicate glasses capture the transition from a polymerized to depolymerized borosilicate network, through compositional changes, and the corresponding visible and THz refractive indices changes, allowing our results to connect Naftaly's trends of glasses with ionic contributions to those without ionic contributions.…”

Effect of femtosecond laser irradiation on structure‐terahertz property relationship in sodium borosilicate glasses

“…We have recently reviewed and provided early insight on structure‐THz property relationship for borosilicate, tellurite, and chalcogenide glass families 2,16,17 . The borosilicate and chalcogenide glass systems studies have been extended to discuss the visible‐THz refractive index correlation and long‐wave infrared‐THz refractive index correlation and the effect of femtosecond laser irradiation, respectively 17,18 . THz‐TDS has been used to study optical properties of various glass families with select compositions and its application in glass science as a nondestructive characterization technique 19 .…”

“…2,16,17 The borosilicate and chalcogenide glass systems studies have been extended to discuss the visible-THz refractive index correlation and long-wave infrared-THz refractive index correlation and the effect of femtosecond laser irradiation, respectively. 17,18 THz-TDS has been used to study optical properties of various glass families with select compositions and its application in glass science as a nondestructive characterization technique. 19 Our current structure-THz property relationship study of the sodium borosilicate glass system examines two tie lines termed NaBSi and BNaSi series.…”