Light-induced absorption and optical damage in Sc-, Mg-, and Zn-doped near-stoichiometric LiNbO3

By measuring the ultraviolet-light-induced absorption in Sc-, Mg- and Zn-doped near-stoichiometric lithium niobate (LiNbO[Formula: see text], we find that the steady-state ultraviolet-light-induced absorption coefficient changes with respect to the doping concentration. There is a strong ultraviolet-light-induced absorption when doping concentration is below its photorefractive threshold and a really weak absorption when the crystal is highly doped. We also use OH[Formula: see text] infrared absorption spectra and the transmitted light spot distortion method to verify the result. Thus, we can determine if the doping level in these doped near-stoichiometric LiNbO3 crystals is above or below their photorefractive threshold by measuring the ultraviolet-light-induced absorption.

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A Study of Na2O-TiO2-SiO2 Glasses by Infrared Spectroscopy

Applied Spectroscopy ◽

10.1366/000370274774332542 ◽

1974 ◽

Vol 28 (3) ◽

pp. 256-259 ◽

Cited By ~ 21

Author(s):

Murli H. Manghnani ◽

John R. Ferraro ◽

L. J. Basile

Keyword(s):

Infrared Spectroscopy ◽

Absorption Band ◽

Infrared Absorption ◽

Vibrational Frequency ◽

Silicate Glasses ◽

Molar Ratio ◽

Frequency Range ◽

Weak Absorption ◽

Infrared Absorption Spectra ◽

The Relationship

The infrared absorption spectra of six Na2O-TiO2-SiO2 glasses in the frequency range of 1600 to 200 cm−1 are reported. These glasses, having a SiO2/Na2O molar ratio of 1.07 to 3.54, and containing 20 or 25 mole % TiO2, demonstrate two main absorptions at ∼950 cm−1 and at ∼450 cm−1. A weak absorption at ∼790 cm−1 becomes progressively weaker in intensity, and a weak shoulder at 1050 cm−1 appears with increasing Na2O content. The frequency of the absorption band at ∼950 cm−1 is found to decrease markedly and systematically with a decrease in the SiO2/Na2O molar ratio, whereas the frequency of the band at ∼450cm−1 shows a slight increase. The infrared results may be interpreted in terms of a lowering of symmetry occurring for the SiO4 units. The effect of TiO2 content on the relationship between vibrational frequency is discussed. The frequency composition curves for glasses containing 20 and 25 mole % of TiO2 intersect at SiO2/Na2O ratio ∼2. A reversal in the frequency vs SiO2/Na2O ratio relation was also found at SiO2/Na2O ∼2 for the sodium silicate glasses.

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Calibration of IR Absorbance in Highly Nitrogen Doped Silicon

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.205-206.234 ◽

2013 ◽

Vol 205-206 ◽

pp. 234-237

Author(s):

Kevin Lauer ◽

Christian Möller ◽

Rudolf Porytskyy ◽

Hartmuth Strutzberg ◽

Dirk Schulze ◽

...

Keyword(s):

Absorption Coefficient ◽

Infrared Absorption ◽

Nitrogen Concentration ◽

Calibration Factor ◽

Ir Absorption ◽

Calibration Function ◽

Nitrogen Doped ◽

Float Zone ◽

Doped Silicon ◽

Infrared Absorption Spectra

Infrared absorption spectra of highly nitrogen doped multicrystalline float zone silicon are reported. By measuring the nitrogen content in silicon using SIMS, a calibration function of the IR absorption coefficient at 963 cm-1(T = 300 K) and the nitrogen concentration is deduced:cN= (1.29 ± 0.05)×1017cm2α963. The calibration factor is 30 % less than the calibration factor reported by Y. Itoh et al. [Appl. Phys. Lett. 47 (1985) 488].

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Study on infrared absorption spectra of congruent lithium niobate crystals at low temperature

Acta Physica Sinica ◽

10.7498/aps.58.4987 ◽

2009 ◽

Vol 58 (7) ◽

pp. 4987

Author(s):

Shi Li-Hong ◽

Yan Wen-Bo

Keyword(s):

Low Temperature ◽

Lithium Niobate ◽

Absorption Spectra ◽

Infrared Absorption ◽

Infrared Absorption Spectra ◽

Lithium Niobate Crystals ◽

Congruent Lithium Niobate

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Infrared absorption spectra of methylidene radicals in solid neon

Chemical Communications ◽

10.1039/c4cc02970d ◽

2014 ◽

Vol 50 (59) ◽

pp. 7968-7970 ◽

Cited By ~ 1

Author(s):

Hsiao-Chi Lu ◽

Jen-Iu Lo ◽

Meng-Yeh Lin ◽

Yu-Chain Peng ◽

Sheng-Lung Chou ◽

...

Keyword(s):

Absorption Spectra ◽

Ultraviolet Light ◽

Infrared Absorption ◽

Vacuum Ultraviolet ◽

Absorption Lines ◽

Infrared Absorption Spectra

Infrared absorption lines of methylidene radicals dispersed in solid neon at 3 K, recorded after photolysis of methane precursors with vacuum-ultraviolet light.

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Phonon resonances and infrared absorption due to interstitial F− ions and substitutional trivalent cations

Canadian Journal of Physics ◽

10.1139/p80-110 ◽

1980 ◽

Vol 58 (6) ◽

pp. 803-811 ◽

Cited By ~ 4

Author(s):

M. A. H. Nerenberg ◽

J. Govindarajan ◽

P. W. M. Jacobs ◽

T. M. Haridasan

Keyword(s):

Absorption Coefficient ◽

Absorption Spectra ◽

Infrared Absorption ◽

Reasonable Agreement ◽

Interstitial Site ◽

Trivalent Cation ◽

Site Symmetry ◽

Function Formulation ◽

Trivalent Cations ◽

Infrared Absorption Spectra

A Green's function formulation is developed to compute the phonon resonances of an F− interstitial perturbed by the presence of a trivalent cation which occupies one of the second neighbour sites of the interstitial in BaF2, the interstitial site symmetry being thereby reduced from Oh to C4v. Expressions for the absorption coefficient are obtained for the case of an isolated interstitial and for that of the interstitial with an adjacent trivalent cation. These expressions are evaluated for both the isolated interstitial and for Fi− associated with Y3+, Gd3+, or La3+. There is reasonable agreement between theory and the experimentally observed infrared absorption spectra measured by Morlot, Hadni, Villermain-Lecollier, and Strimer.

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