0000000000328712

AUTHOR

Bernd Güttler

showing 3 related works from this author

Detection of Interstitial Oxygen Molecules in SiO2Glass by a Direct Photoexcitation of the Infrared Luminescence of SingletO2

1996

The presence of interstitial oxygen molecules in glassy ${\mathrm{SiO}}_{2}$ has been demonstrated directly by 1064.1 nm $({\ensuremath{\nu}}^{\ensuremath{'}\ensuremath{'}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0)\ensuremath{\rightarrow}({\ensuremath{\nu}}^{\ensuremath{'}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1)$ excitation of the forbidden ${O}_{2}$ molecule $^{1}\ensuremath{\Delta}_{g}({\ensuremath{\nu}}^{\ensuremath{'}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0)\ensuremath{\rightarrow}^{3}\ensuremath{\Sigma}_{g}({\ensuremath{\nu}}^{\ensuremath{'}\ensuremath{'}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0)$ luminescence transition at 1272 nm in S…

PhysicsInfraredGeneral Physics and Astronomychemistry.chemical_elementOxygenVacuum ultravioletPhotoexcitationCrystallographyNuclear magnetic resonancechemistryMoleculeSinglet stateNeutron irradiationLuminescencePhysical Review Letters
researchProduct

Metal doping effects in NIR Raman spectra of YBCO epitaxial films

1996

Metal doping (Co, Zn) of YBCO epitaxial thin films leads to large changes of the scattering efficiencies of various lattice modes in near-infrared (NIR) -Raman spectra (1064 nm) if it is accompanied by a variation of the charge carrier concentration. The results resemble earlier observations in oxygen depleted YBCO thin films. In contrast, no effect is found when metal doping does not change the carrier concentration even if it leads to a massive Tc suppression.

Materials scienceScatteringDopingtechnology industry and agricultureAnalytical chemistryCondensed Matter PhysicsEpitaxyAtomic and Molecular Physics and OpticsMetalsymbols.namesakevisual_artsymbolsvisual_art.visual_art_mediumGeneral Materials ScienceCharge carriersense organsThin filmRaman spectroscopyRaman scatteringJournal of Low Temperature Physics
researchProduct

Infrared photoluminescence of preexisting or irradiation-induced interstitial oxygen molecules in glassySiO2and α-quartz

1998

A sensitive technique for detecting interstitial ${\mathrm{O}}_{2}$ molecules in ${\mathrm{SiO}}_{2}$ is demonstrated by measuring their infrared $\stackrel{\ensuremath{\rightarrow}}{a}X$ luminescence at 1272.2 nm under a Ti-sapphire laser excitation into the ${\mathrm{O}}_{2}\stackrel{\ensuremath{\rightarrow}}{X}b$ absorption band at 765 nm. Contrary to the case of ${\mathrm{O}}_{2}$ trapped in inert gas matrices, the visible emission of ${\mathrm{O}}_{2}$ corresponding to the direct $\stackrel{\ensuremath{\rightarrow}}{b}X$ transition is not found. Examination of different neutron- and gamma-irradiated glassy ${\mathrm{SiO}}_{2}$ and \ensuremath{\alpha}-quartz samples reveals radiation-in…

Materials sciencePhotoluminescencebusiness.industryInfraredchemistry.chemical_elementOxygenCondensed Matter::Materials ScienceCrystallographychemistryAbsorption bandMoleculeOptoelectronicsIrradiationLuminescencebusinessQuartzPhysical Review B
researchProduct