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Optical Determination of the Band Gap and Band Tail of Epitaxial AgZnSnSe at Low Temperature
S. Perret, Y. Curé, L. Grenet +3
We report on the precise determination of both the band gap E, and the characteristic energy of the band tail of localized defect states, for monocrystalline AgZ…
Polarity determination in ZnSe nanowires by HAADF STEM
Martien Den Hertog, Miryam Elouneg-Jamroz, Edith Bellet-Amalric +7
High angle annular dark field scanning transmission electron microscopy is used to analyze the polarity of ZnSe nanowires grown, by molecular beam epitaxy, on GaAs substrates. The…
Dark exciton optical spectroscopy of a semiconducting quantum dot embedded in a nanowire
Gregory Sallen, Adrien Tribu, Thomas Aichele +6
Photoluminescence of a single CdSe quantum dot embedded in a ZnSe nanowire has been investigated. It has been found that the dark exciton has a strong influence on the optical prop…
Defect-free ZnSe nanowire and nano-needle nanostructures
Thomas Aichele, Adrien Tribu, Catherine Bougerol +3
We report on the growth of ZnSe nanowires and nano-needles using molecular beam epitaxy (MBE). Different growth regimes were found, depending on growth temperature and the Zn--Se f…
Optical Anisotropy and Pinning of the Linear Polarization of Light in Semiconductor Microcavities
L. Klopotowski, M. D. Martin, A. Amo +6
We report a strong experimental evidence of the optical anisotropy in a CdTe-based microcavity: the polarization of light is pinned to one of the crystallographic axes independentl…
Time-Resolved Spectroscopy of Single Excitons Bound to Pairs of Te Isoelectronic Impurity Centers in ZnSe
A. Muller, P. Bianucci, C. Piermarocchi +4
Tellurium impurity centers in ZnSe were individually probed with time-resolved photoluminescence (PL) spectroscopy. Resolution-limited peaks with an ultra-low spatial density origi…