Third-order optical nonlinearities in anatase and rutile TiO2 thin films

Influence of Nd dopant amount on microstructure and photoluminescence of TiO2:Nd thin films

“…5). The width of the optical band gap energy (E g ) of undoped TiO 2 was equal to 3.13 eV and it is in good correlation with values reported by others [51][52][53]. For TiO 2 thin films doped with neodymium in the amount from 0.6 to 2.0 at.% values of E g remained very similar (3.1-3.14 eV) to undoped titania and obtained differences were within the measurements error.…”

Optical limiting properties in copper oxide thin films under a high-repetition-rate femtosecond laser

“…According to the theory of the Z-scan method, the nonlinear absorption coefficient b (cm/GW), defined as a¼a 0 þbI, can be calculated using the following equation if two-photo absorption is activated [16,17]:…”

Anatase phase formation kinetics in Ti and TiOx nanoparticles produced by gas-phase condensation

“…LN-H and RT-H showed light absorption onset at 399 and 392 nm, respectively. The optical band gap (E g ) was determined for LN-H and RT-H samples using the following equation for indirect band gap semiconductors [33,34]:…”