ZIB

Treffer pro Seite

Treffer 1 - 3 | 3 Treffer

Sortierung

Digitale Medien

InAs quantum boxes: Highly efficient radiative traps for light emitting devices on Si (1996)

Gérard, J. M. ; Cabrol, O. ; Sermage, B.

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 68 (1996), S. 3123-3125

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1077-3118

Quelle: AIP Digital Archive

Thema: Physik

Notizen: We have compared by photoluminescence (PL) the radiative quantum efficiencies η of an array of InAs/GaAs quantum boxes (QBs) obtained by self-organized growth and of a single high quality InGaAs quantum well (QW). On GaAs substrates, η is essentially the same for both structures. A growth on a commercial GaAs-on-Si substrate entails drastic quenching of the integrated PL intensity and shortening of the carrier lifetime τ for the InGaAs QW, whereas both τ and η are not modified for the QB array. The efficient carrier capture by InAs QBs, combined with the localized nature of QB excitons hinders in this case the carrier diffusion toward dislocations. These superior properties of QBs on Si, which are observed over a wide range of excitation powers and for temperatures up to 300 K, opens a novel route toward efficient and reliable light emitters on Si. © 1996 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.115798

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Digitale Medien

Relativistic calculation of the electronic structure of the IF molecule (1996)

Cabrol, O. ; Girard, B. ; Spiegelmann, F. ; [weitere]

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 105 (1996), S. 6426-6438

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1089-7690

Quelle: AIP Digital Archive

Thema: Physik , Chemie und Pharmazie

Notizen: The electronic structure of IF is investigated using ab initio pseudopotentials and a variational/perturbative MRCI scheme (CIPSI/CIPSO). All the valence states dissociating into neutral asymptotes I(2P1/2,2P3/2)+F(2P1/2,2P3/2) and ionic asymptotes I+(3P2,3P1,3P0,1D2,1S0) +F−(1S0) are determined up to the region where they undergo avoided crossing with the neutral excited states dissociating into I*+F. The spectroscopic properties are derived and discussed in comparison with the available experimental results, with emphasis on the X, B, E, A, β, A′, and D′ states. © 1996 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.472996

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Digitale Medien

«Self-organized» InAs/GaAs quantum dots (1995)

Marzin, J. -Y. ; Gerard, J. -M. ; Cabrol, O. ; [weitere]

Springer

Il nuovo cimento della Società Italiana di Fisica 17 (1995), S. 1285-1293

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0392-6737

Schlagwort(e): Localized single-particle electronic states (excluding impurities) ; Electron states in low-dimensional structures (including quantum wells, superlattices, layer structures, and intercalation compounds) ; Conference proceedings

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Summary We discuss some specific properties of self-organized InAs-GaAs quantum dots grown by Molecular Beam Epitaxy. We report on the optical spectra obtained under resonant excitation, where both a Raman contribution and a resonant emission of the dots are evidenced. We show that the emission of single dots can easily be isolated by processing measas on samples with a graded indium content, and finally discuss the temporal and temperature behaviour of the emission.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02457200

Permalink

Bibliothek	Standort	Signatur	Band/Heft/Jahr	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

Treffer 1 - 3 | 3 Treffer