M
M. Keim
Researcher at University of Würzburg
Publications - 44
Citations - 2393
M. Keim is an academic researcher from University of Würzburg. The author has contributed to research in topics: Heterojunction & Photoluminescence. The author has an hindex of 15, co-authored 44 publications receiving 2319 citations.
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Injection and detection of a spin-polarized current in a light-emitting diode
TL;DR: In this article, the magnetic semiconductor BexMnyZn1-x-ySe is used as a spin aligner to inject spin-polarized charge into a non-magnetic semiconductor device.
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Laser diodes based on beryllium-chalcogenides
Andreas Waag,F. Fischer,K. Schüll,Thierry Baron,Hans-Juergen Lugauer,Th. Litz,Ulrich Zehnder,W. Ossau,T. Gerhard,M. Keim,G. Reuscher,G. Landwehr +11 more
TL;DR: In this paper, the first fabrication of laser diodes based on the wide band gap II-VI semiconductor compound BeMgZnSe was reported, with a wavelength of 507 nm under pulsed current injection at 77 K.
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Novel beryllium containing II–VI compounds: basic properties and potential applications
Andreas Waag,Andreas Waag,Th. Litz,F. Fischer,H.-J. Lugauer,Thierry Baron,K. Schüll,U. Zehnder,T. Gerhard,U. Lunz,M. Keim,G. Reuscher,G. Landwehr +12 more
TL;DR: In this article, basic properties of Be containing II-VI compounds are described, and the potential of these novel materials are discussed, as well as their application aspects and their potential for quantum well structures.
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Giant Electro-optical Anisotropy in Type-II Heterostructures
Alexey V. Platonov,V. P. Kochereshko,E. L. Ivchenko,G. V. Mikhailov,Dmitri R. Yakovlev,M. Keim,W. Ossau,Andreas Waag,G. Landwehr +8 more
TL;DR: In this article, a theoretical approach based on the representation of optical matrix elements in the microscopical tight-binding model was developed which is shown that polarized light spectroscopy allows one to obtain microscopic information on interfaces in heterostructures, especially on the orientation of chemical bonds.
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Ellipsometric studies of Be x Zn 1-x Se between 3 eV and 25 eV
K. Wilmers,K. Wilmers,T. Wethkamp,T. Wethkamp,Norbert Esser,C. Cobet,Wolfgang Richter,Manuel Cardona,Veit Wagner,H.-J. Lugauer,F. Fischer,T. Gerhard,M. Keim +12 more
TL;DR: In this paper, the authors determined the dielectric function of the ZnSe spectra by spectroscopic ellipsometry in the UV and VUV range and assigned the observed structures to interband transitions at specific points or regions of the Brillouin zone.