About: An optical and dielectric spectroscopy study of Er3+-doped KTaO3.

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We report the results of a multifaceted study of optical and dielectric properties of erbium-doped potassium tantalate crystals. Studies of optical absorption and photoluminescence allowed us to determine the system of energy levels that control the main internal optical transitions in the 4f electronic shell of Er3+ in KTaO3. It was found that at least two types of Er-centres,major and minor ones, are present. The major centres are noncubic,formed by Er3+ substituting for K+ sites; these are responsible for the n-type conductivity of crystals. Wideband optical absorption with a maximum at 1.13 eV was attributed to polaron formation.Far-IR reflectivity studies revealed an increase in the frequency of the lowest transverse optical mode and a decrease in the dielectric permittivity in comparison with undoped crystals. This stiffening means the suppression of the ferroelectric instability in the system. We report the results of a multifaceted study of optical and dielectric properties of erbium-doped potassium tantalate crystals. Studies of optical absorption and photoluminescence allowed us to determine the system of energy levels that control the main internal optical transitions in the 4f electronic shell of Er3+ in KTaO3. It was found that at least two types of Er-centres,major and minor ones, are present. The major centres are noncubic,formed by Er3+ substituting for K+ sites; these are responsible for the n-type conductivity of crystals. Wideband optical absorption with a maximum at 1.13 eV was attributed to polaron formation.Far-IR reflectivity studies revealed an increase in the frequency of the lowest transverse optical mode and a decrease in the dielectric permittivity in comparison with undoped crystals. This stiffening means the suppression of the ferroelectric instability in the system. (en)
Title	An optical and dielectric spectroscopy study of Er3+-doped KTaO3. An optical and dielectric spectroscopy study of Er3+-doped KTaO3. (en)
skos:prefLabel	An optical and dielectric spectroscopy study of Er3+-doped KTaO3. An optical and dielectric spectroscopy study of Er3+-doped KTaO3. (en)
skos:notation	RIV/68378271:_____/11:00368463!RIV12-AV0-68378271
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(1M06002), P(GC202/09/J017), P(KAN301370701), Z(AV0Z10100520), Z(AV0Z10100522)
http://linked.open...iv/cisloPeriodika	12
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Nuzhnyy, Dmitry Trepakov, Vladimír Potůček, Zdeněk Jastrabík, Lubomír Dejneka, Alexandr
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	185520
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/11:00368463
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Er3+ centres; IR spectroscopy; optical absorption photoluminescence; potassium tantalate; THz spectroscopy (en)
http://linked.open.../riv/klicoveSlovo	Er3+ centres IR spectroscopy THz spectroscopy optical absorption photoluminescence potassium tantalate
http://linked.open...odStatuVydavatele	DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV	[D4F4960E741B]
http://linked.open...i/riv/nazevZdroje	Physica Status Solidi B-Basic Solid State Physics
http://linked.open...in/vavai/riv/obor	BH
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Optical structures, detection systems and relevant technologies for low photon number applications Low Temperature Plasma Deposition of Perovskite Thin Films on Base Metal and Polymer Substrates Nanostructured Macroscopic Systems - Technology and Characterisation
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	248
http://linked.open...iv/tvurceVysledku	Dejneka, Alexandr Jastrabík, Lubomír Nuzhnyy, Dmitry Poletaev, N. Potůček, Zdeněk Skvortsov, A. Trepakov, Vladimír
http://linked.open...ain/vavai/riv/wos	000298263400023
http://linked.open...n/vavai/riv/zamer	Specific effects in condensed systems with reduced dimension and broken symmetry Wave and Corpuscular Light Propagation, Optical Materials and Technology
issn	0370-1972
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1002/pssb.201147080

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