An overview of the properties of electron small polarons and bipolarons is given, which can
occur in the congruently melting composition of LiNbO 3 (LN). Such polarons influence the …

Generation of high‐power radiation in terahertz frequency range 0.3–10 THz is a fast
developing research area attracting considerable interest over the past years due to its …

We report on the study of photorefractive properties of as-grown nominally pure lithium
niobate and tantalate crystals using whispering gallery mode (WGM) resonators. The …

Spontaneous parametric down-conversion (SPDC) in media with no inversion center and
the use of this phenomenon in the spectroscopy of natural oscillation states of a crystal …

Photorefractive damage (PRD) in as-grown, oxidized, and slightly reduced nominally pure
LiNbO 3⁠, and iron-doped crystals with different compositions has been studied with the …

Femtosecond-pulse-induced (E_pump= 2.5 eV) picosecond infrared absorption is studied in
the spectral region between 0.30 eV and 1.05 eV in LiNbO_3: Mg. We find a non …

The results of a comparative study of composition dependences of the light-induced
refractive index change, photorefractive sensitivity, polaron luminescence, and intrinsic …

We report on the study of near-infrared photorefractivity in highly Mg doped as-grown
congruent Li Nb O 3 forming a whispering gallery mode resonator. The resonator is pumped …

Strong light-induced absorption has been observed in lithium niobate crystals doped with
magnesium after application of femtosecond illumination. In this material there are no Nb-on …

Optical whispering gallery modes (WGMs) are closed circulating electromagnetic waves
undergoing total internal reflection inside an axio-symmetric body of a transparent dielectric …