Reduction-induced polarons and optical response of Mg-doped LiNbO3 crystals

Китаева, Г. Х.; Кузнецов, К. А.; Morozova, V.F.; Naumova, I. I.; Penin, A. N.; Shepelev, A. V.; Viskovatich, A. V.; Жигунов, Д. М.

doi:10.1007/s00340-004-1471-0

Cited by 18 publications

(12 citation statements)

References 29 publications

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“…4). This spectral dependence of α li in LNMg matches the absorption of small free polarons at Nb 4+/5+ Nb sites observed in reduced Mg-doped LiNbO 3 [16]. Additionally, the dependence of α li on the probe polarization in LNMg is the same as the dependence of the absorption coefficient on the light polarization reported for small free polarons in [9].…”

Section: Discussionsupporting

confidence: 65%

Polarons in magnesium-doped lithium niobate crystals induced by femtosecond light pulses

et al. 2008

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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-Li-site defects and hence no antisite polarons occur, but small free polarons close to the conduction band can be generated. The light-induced absorption observed is attributed to these polarons. For LiNbO 3 :Mg, their decay times are about two orders of magnitude smaller than those of the Nb-on-Li-site polarons in undoped material. The results are relevant for a better understanding of the suppression of the so-called optical damage in these crystals and for their use in femtosecond applications.PACS 42.70.Mp · 71.38.-k · 42.50.Gy

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Section: Discussionsupporting

confidence: 65%

Polarons in magnesium-doped lithium niobate crystals induced by femtosecond light pulses

et al. 2008

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“…Among the materials possessing high nonlinear susceptibility and suitable for QPM, periodically poled lithium niobate crystals still occupy leading positions [150,152] due to their transparency for visible and nearinfrared pumping [168][169][170][171] and well-developed poling techniques [116][117][118][119][120][121][122]. Frequency tuning of the radiation generated by QPM structures can be obtained by chang- Terahertz output Figure 6 (online color at www.lphys.org) Schematic diagram and orientation of the wave-vectors for optical rectification in a tilted periodically poled crystal ing the poling period and the crystal dispersion via temperature.…”

Section: Quasi-phase Matchingmentioning

confidence: 99%

Terahertz generation by means of optical lasers

Китаева

2008

Laser Phys. Lett.

172

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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 important applications in spectroscopy, communication, biomedical imaging and tomography. A brief review of laser-based generation methods is presented, starting from the schemes of resonance laser excitation of photoconductive materials, organic molecules and ionized gases, and proceeding with more detailed description of non-resonance schemes of optical rectification and difference frequency generation in materials with high optical nonlinearity. Recent progress achieved in both groups of methods is compared. Optical pump CrystalTerahertz outputDifference-frequency generation in a bulk non-linear crystal. Schematic diagram and orientations of the wave-vectors inside the crystal

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“…Another is increasing the [Li]/[Nb] ratio in LiNbO 3 crystals [7,8]. The other method is employing the proper post treatment process (reduction or oxidation) on LiNbO 3 crystals [9][10][11].…”

Section: Introductionmentioning

confidence: 98%

Effect of reduction/oxidation treatment on blue photorefraction in In:Fe:Cu:LiNbO₃ crystals

Luo¹,

Wang

et al. 2010

Cryst. Res. Technol.

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In:Fe:Cu:LiNbO 3 crystals with reduced/oxidized treatments were prepared by the Czochralski method. The defect structure was analyzed by the UV-Visible absorption spectra. The blue photorefractive properties, such as the refractive index change, response time, recording sensitivity, dynamic range as well as two-wave coupling gain coefficient, were also investigated at 488 nm wavelength using the two-wave coupling experiment. Comparing the as-grown and oxidized In:Fe:Cu:LiNbO 3 crystals, the reduced sample has the highest recording sensitivity and largest dynamic range. Meanwhile, the high diffraction efficiency is still maintained. Experimental results definitely show that reduction treatment is an effective method to improve the blue photorefractive performance of In:Fe:Cu:LiNbO 3 crystals.

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Reduction-induced polarons and optical response of Mg-doped LiNbO3 crystals

Cited by 18 publications

References 29 publications

Polarons in magnesium-doped lithium niobate crystals induced by femtosecond light pulses

Polarons in magnesium-doped lithium niobate crystals induced by femtosecond light pulses

Terahertz generation by means of optical lasers

Effect of reduction/oxidation treatment on blue photorefraction in In:Fe:Cu:LiNbO₃ crystals

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Reduction-induced polarons and optical response of Mg-doped LiNbO3 crystals

Cited by 18 publications

References 29 publications

Polarons in magnesium-doped lithium niobate crystals induced by femtosecond light pulses

Polarons in magnesium-doped lithium niobate crystals induced by femtosecond light pulses

Terahertz generation by means of optical lasers

Effect of reduction/oxidation treatment on blue photorefraction in In:Fe:Cu:LiNbO3 crystals

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Effect of reduction/oxidation treatment on blue photorefraction in In:Fe:Cu:LiNbO₃ crystals