84 citations · 355 across the 9 of their papers we have counts for
9 papers
Monitoring the formation of nanowires by line-of-sight quadrupole mass spectrometry: a comprehensive description of the temporal evolution of GaN nanowire ensembles
Sergio Fernández-Garrido, Johannes K. Zettler, Lutz Geelhaar +1
We use line-of-sight quadrupole mass spectrometry to monitor the spontaneous formation of GaN nanowires on Si during molecular beam epitaxy. We find that the temporal evolution of…
Observation of dielectrically confined excitons in ultrathin GaN nanowires up to room temperature
Johannes K. Zettler, Pierre Corfdir, Christian Hauswald +10
The realization of semiconductor structures with stable excitons at room temperature is crucial for the development of excitonics and polaritonics. Quantum confinement has commonly…
Absence of quantum-confined Stark effect in GaN quantum disks embedded in (Al,Ga)N nanowires grown by molecular beam epitaxy
C. Sinito, P. Corfdir, C. Pfüller +14
Several of the key issues of planar (Al,Ga)N-based deep-ultraviolet light emitting diodes could potentially be overcome by utilizing nanowire heterostructures, exhibiting high stru…
Nature of excitons bound to inversion domain boundaries: Origin of the 3.45-eV luminescence lines in spontaneously formed GaN nanowires on Si(111)
Carsten Pfüller, Pierre Corfdir, Christian Hauswald +9
We investigate the 3.45-eV luminescence band of spontaneously formed GaN nanowires on Si(111) by photoluminescence and cathodoluminescence spectroscopy. This band is found to be pa…
Improved control over spontaneously formed GaN nanowires in molecular beam epitaxy using a two-step growth process
Johannes K. Zettler, Pierre Corfdir, Lutz Geelhaar +3
We investigate the influence of modified growth conditions during the spontaneous formation of GaN nanowires on Si(111) in plasma-assisted molecular beam epitaxy. We find that a tw…
Stacking faults as quantum wells in nanowires: Density of states, oscillator strength and radiative efficiency
P. Corfdir, C. Hauswald, J. K. Zettler +6
We investigate the nature of excitons bound to I1 basal-plane stacking faults [(I1;X)] in GaN nanowire ensembles by continuous-wave and time-resolved photoluminescence spectroscopy…
Investigating the origin of the nonradiative decay of bound excitons in GaN nanowires
Christian Hauswald, Pierre Corfdir, Johannes K. Zettler +9
We investigate the origin of the fast recombination dynamics of bound and free excitons in GaN nanowire ensembles by temperature-dependent photoluminescence spectroscopy using both…
Sub-meV linewidth in GaN nanowire ensembles: absence of surface excitons due to the field-ionization of donors
Pierre Corfdir, Johannes K. Zettler, Christian Hauswald +3
We observe unusually narrow donor-bound exciton transitions (0.4 meV) in the photoluminescence spectra of GaN nanowire ensembles grown on Si(111) substrates at very high (> 850 deg…
Statistical analysis of the shape of one-dimensional nanostructures: determining the coalescence degree of spontaneously formed GaN nanowires
Oliver Brandt, Sergio Fernández-Garrido, Johannes K. Zettler +4
Single GaN nanowires formed spontaneously on a given substrate represent nanoscopic single crystals free of any extended defects. However, due to the high area density of thus form…