6533b823fe1ef96bd127df49
RESEARCH PRODUCT
Subpicosecond Laser Spectroscopy of Blue-Light-Induced Absorption in KNbO3 and LiNbO3
H. M. YochumGábor CorradiLarisa GrigorjevaKamil B. UcerRichard T. WilliamsDonāts Millerssubject
Tunable diode laser absorption spectroscopyMaterials scienceAbsorption spectroscopylawInfraredUltrafast laser spectroscopyNanosecondAtomic physicsSpectroscopyAbsorption (electromagnetic radiation)Laserlaw.inventiondescription
Pulses of 427-nm light from am amplified Ti:sapphire frequency-doubled laser are absorbed in two-photon band-gap excitations of KNbO3 and LiNbO3. Induced absorption spectra measured in the visible and recently extended in the infrared have been recorded as a function of delay from 0 to 250 ps after two-photon blue excitation. Samples include stoichiometric as well as congruent LiNbO3. Comparison is made to transient absorption in the nanosecond and longer time range induced by electron pulses of~10 ns width and 270 keV energy. Parts of the absorption can be attributed to bound and free polarons, including the intrinsic electron polaron.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-01-01 |