Refractive index and density changes in silica glass by halogen doping

Preparation and characterization of new fluorotellurite glasses for photonics application

“…In addition, since the refractive index of a glass is also related to its density, the lowering of the glass density induced by the introduction of ZnF 2 concentration will also contribute to the decrease in refractive index: this result is in good agreement with other similar studies performed on silica based glasses [12,13].…”

Compositional dependence of optical parameters in Se–Bi–Te–Ag thin films

“…Various empirical and theoretical relations correlating the refractive index n with density ρ of the glasses are given [44,45] in the literature. Our results for refractive index show a similar trend to the one found [45,46] in permanently densified glasses. Moreover, the increase in n 1 with Ag concentration may also be explained [47] in terms of the mean polarizability α of the system.…”

“…So, larger the atomic radius of the atom, larger will be its polarizability and consequently larger will be the refractive index. Thus, the change in refractive index n by Ag doping can be attributed [46,49]: (i) to the change in ρ caused by the structural rearrangement in the glass under study and (ii) change in mean polarizability caused by the formation of hetropolar bonds. From the above discussion we can say that the density ρ and mean polarizability α are the two major factors [49] that contribute to the variation in refractive index.…”

Evaluation of synthetic silica glasses by the ultrasonic microspectroscopy technology

“…T f of the ED-B specimens were estimated from ρ using the relationship between ρ and T f for silica glass using the following equation [10].…”