K
K. Leonardi
Researcher at University of Bremen
Publications - 33
Citations - 728
K. Leonardi is an academic researcher from University of Bremen. The author has contributed to research in topics: Quantum dot & Photoluminescence. The author has an hindex of 13, co-authored 33 publications receiving 716 citations.
Papers
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Journal ArticleDOI
Single zero-dimensional excitons in cdse/znse nanostructures
TL;DR: In this paper, a splitting of the ground state into a linearly polarized doublet with an energy spacing up to 1.5 meV is found, varying from dot to dot in sign and magnitude.
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Stark effect and polarizability in a single CdSe/ZnSe quantum dot
Jochen Seufert,M. Obert,Michael Scheibner,Nikolay A. Gippius,Gerd Bacher,Alfred Forchel,T. Passow,K. Leonardi,Detlef Hommel +8 more
TL;DR: In this paper, the quantum-confined Stark effect in a single self-assembled CdSe/ZnSe quantum dot was studied by means of highly spatially resolved photoluminescence spectroscopy.
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Spectral diffusion of the exciton transition in a single self-organized quantum dot
Jochen Seufert,Rosa Weigand,Gerd Bacher,Tilmar Kümmell,Alfred Forchel,K. Leonardi,Detlef Hommel +6 more
TL;DR: In this paper, reversible spectral shifts in the emission spectra of self-organized CdSe single quantum dots on a time scale of seconds have been observed and can be attributed to the Stark effect caused by fluctuating local electric fields.
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CdSe/ZnSe quantum structures grown by migration enhanced epitaxy: Structural and optical investigations
TL;DR: In this paper, migration enhanced epitaxy has been applied to induce the change from two-dimensional growth to formation of self-assembling islands in the growth of CdSe on ZnSe.
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Quantum dot formation by segregation enhanced CdSe reorganization
T. Passow,K. Leonardi,H. Heinke,Detlef Hommel,Dimitri Litvinov,Andreas Rosenauer,Dagmar Gerthsen,Jochen Seufert,Gerd Bacher,Alfred Forchel +9 more
TL;DR: The influence of growth conditions during capping of CdSe/ZnSe quantum structures grown on GaAs(001) by molecular-beam epitaxy (MBE) were systematically investigated by high-resolution x-ray diffraction, transmission electron microscopy, and temperature dependent, partly time-resolved photoluminescence spectroscopy.