Search results for " silicon compounds"

showing 3 items of 3 documents

Assessment for the mean value total dressing method: Comparison with coupled cluster including triples methods for BF, NO+, CN+, C2, BeO, NH3, CH2, H…

1997

Limited previous experience with the mean value total dressing (MVTD) method had shown that MVTD energies for closed shell systems are generally better than CCSD(T) ones compared to FCI. The method, previously published as total dressing 2′(td-2′), is based on the single reference intermediate Hamiltonian theory. It is not a CC method but deals in a great part with the same physical effects that CC methods that incorporate amplitudes of triples such as CCSDT or its CCSDT-1n approaches. A number of test calculations comparing to diverse CC methods, as well as FCI and experiment when available, have been performed. The tests concern equilibrium energies in NH3 and CH2, equilibrium energies an…

Carbon compoundsGeneral Physics and AstronomyBoron compounds ; Nitrogen compounds ; Water ; Ammonia ; Ozone ; Organic compounds ; Carbon compounds ; Beryllium compounds ; Hydrogen compounds ; Silicon compounds ; Lithium ; Lithium compounds ; Carbon ; Neon compounds ; Coupled cluster calculations ; Dissociation ; Dissociation energies ; Positive ionsLithiumDissociation (chemistry)Nitrogen compoundsIonDissociation energiesOzoneCoupled cluster calculationsAmmoniaBeryllium compoundsOrganic compoundsMoleculeSilicon compoundsPhysical and Theoretical Chemistry:FÍSICA::Química física [UNESCO]Open shellChemistryNeon compoundsMean valueWaterLithium compoundsHydrogen compoundsDiatomic moleculeCarbonUNESCO::FÍSICA::Química físicaCoupled clusterAmplitudeBoron compoundsPositive ionsAtomic physicsDissociation
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Responsivity measurements of silicon carbide Schottky photodiodes in the UV range

2014

We report on the design and the electro-optical characterization of new classes of 4H-SiC Schottky UV detectors, fabricated employing Ni 2 Si interdigitated strips. We have measured, in dark conditions, the forward and reverse I-V characteristics as a function of temperature and C-V characteristics. Responsivity measurements of the devices, as function of wavelength in the UV range, of package temperature and of applied reverse bias are reported. We also compared devices featuring different strip pitch sizes, discussing their performances, and found the device exhibiting best results.

Materials sciencebusiness.industryWide-bandgap semiconductorPhotodetectorSchottky diodeSettore ING-INF/02 - Campi ElettromagneticiSettore ING-INF/01 - ElettronicaTemperature measurementSchottky diodes silicon compounds photodetectors UV light silicon carbide responsivityPhotodiodelaw.inventionResponsivitychemistry.chemical_compoundchemistrylawSilicon carbideOptoelectronicsPhotonicsbusiness2014 Third Mediterranean Photonics Conference
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Excited-state absorption in erbium-doped silica fiber with simultaneous excitation at 977 and 1531 nm

2009

We report a study of the excited-state absorption (ESA) in erbium-doped silica fiber (EDF) pumped at 977 nm, when the fiber is simultaneously excited by signal radiation at 1531 nm. We show, both experimentally and theoretically, that ESA efficiency at 977 nm gets strongly enhanced only in the presence of signal power. Experimentally, this conclusion is supported through the detection of upconversion emission, a “fingerprint” of the ESA process, and through the measurements of the EDF nonlinear transmission coefficient for the pump wavelength, which is sensitive to the ESA value. It is shown that the experimental data are precisely modeled with an advanced five-level Er3+ model developed fo…

Optical pumpingMaterials scienceSilica fiberbusiness.industryExcited statesUNESCO::FÍSICAGeneral Physics and Astronomychemistry.chemical_elementPhoton upconversionOptical pumpingErbiumOpticschemistry:FÍSICA [UNESCO]Fiber laserExcited stateDopingSilicon compoundsOptoelectronicsDoping ; Erbium ; Excited states ; Fibre lasers ; Optical pumping ; Silicon compoundsFiberAbsorption (electromagnetic radiation)businessErbiumFibre lasersJournal of Applied Physics
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