Optical properties due to Structural Imperfection in Silica.

Optical properties of in-vitro biomineralised silica

Silicon is the second most common element on the Earth's crust and its oxide (SiO(2)) the most abundant mineral. Silica and silicates are widely used in medicine and industry as well as in micro- and nano-optics and electronics. However, the fabrication of glass fibres and components requires high temperature and non-physiological conditions, in contrast to biosilica structures in animals and p...

Linear optical properties of Ge nanocrystals in silica

Structural properties and phase transitions in a silica clathrate.

Melanophlogite, a low-pressure silica polymorph, has been extensively studied at different temperatures and pressures by molecular dynamics simulations. While the high-temperature form is confirmed as cubic, the low-temperature phase is found to be slightly distorted, in agreement with experiments. With increasing pressure, the crystalline character is gradually lost. At 8 GPa, the radial distr...

Structural modifications in fused silica due to laser damage induced shock compression

High power laser pulses can produce damage in high quality fused silica optics that can lead to its eventual obscuration and failure. Current models suggest the initiation of a plasma detonation due to absorbing initiators and defects, leading to the formation of shock waves. Recent experiments have found a densified layer at the bottom of damage sites, as evidence of the laser-damage model. We...

Calculation of structural ,electronical and optical properties TiO2 in anatase phase

In this Paper, the structural, electronic and optical properties of TiO2 compound are investigated and calculated.The calculations were performed using the full potential linear augmented plane wave (PP-PW) method within density functional theory (DFT)and using the Wien2k package.Structural properties such as lattice constants, bulk modulus and compressibility of this combination are calculated...