Abstract
We have measured infrared reflectivity spectra of thin lithium niobate films of nanometer thickness, grown by a pulsed laser deposition technique using KrF-excimer laser (λ=248 nm) on the single crystalline substrates (sapphire, MgO, NdGaO3 and SrTiO3). Using the dispersion analysis technique, we have calculated thicknesses and optical constants of the films. The phonon parameters of the substrates and films are obtained.
Highlights
Electro-optical and optical photorefractive crystal of lithium niobate (LiNbO3) is one of the most widely currently used ferroelectric materials in piezotechnique, quantum opto-and acoustoelectronics
Typical growth parameters – pressure of O2 is from 0.5 to 1 mbar and the substrate temperature is from 600°C to 700°C
Reflectance of the infrared (IR) radiation is widely used to study the vibrational spectra of bulk materials and coatings on them
Summary
Electro-optical and optical photorefractive crystal of lithium niobate (LiNbO3) is one of the most widely currently used ferroelectric materials in piezotechnique, quantum opto-and acoustoelectronics. Mm2) on the surface of the target (LiNbO3 single crystal), with a pulse energy of 170 to 220 mJ. Typical growth parameters – pressure of O2 is from 0.5 to 1 mbar and the substrate temperature is from 600°C to 700°C.
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