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RESEARCH PRODUCT
Transient absorption of polarons in KNbO3
Vladimir PankratovDonats MillersLarisa GrigorjevaYong QiuKamil B. UcerRichard T. Williamssubject
PhysicsNuclear and High Energy PhysicsExtended X-ray absorption fine structureElectronPolaronLaserSpectral linelaw.inventionlawUltrafast laser spectroscopyAtomic physicsAbsorption (electromagnetic radiation)InstrumentationExcitationdescription
Abstract Transient absorption spectra have been measured in a number of undoped KNbO 3 crystals following two kinds of electronic excitation: two-photon absorption of 200 fs laser pulses and 10 ns pulsed electron beam. A band peaking at 0.8 eV and broad, poorly resolved absorption in the range 1.3–3.3 eV were observed. Based on similarity to the 1 eV band in LiNbO 3 previously identified as the intrinsic electron polaron (electron self-localized on niobium in the regular lattice site), we suggest that the transient absorption band at 0.8 eV in KNbO 3 is also associated with the intrinsic electron polaron.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-05-01 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |