DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2015 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

HL: Fachverband Halbleiterphysik

HL 72: Quantum wires

HL 72.5: Talk

Thursday, March 19, 2015, 11:15–11:30, EW 203

Optical characterization of high-periodicity InGaAs-InAlAs-based core-shell nanowire arrays — •Maximilian Speckbacher1, Julian Treu1, Thomas Stettner1, Stefanie Morkötter1, Markus Döblinger2, Sonja Matich1, Kai Saller1, Max Bichler1, Markus Christian Amann1, Jonathan Finley1, Gerhard Abstreiter1,3, and Gregor Koblmüller11Walter Schottky Institut and Physik Department, TU München, Garching, Germany — 2Department of Chemistry, Ludwig-Maximilians-Universität München, Munich, Germany — 3TUM Institute for Advanced Study, Garching, Germany

In1−xGaxAs nanowires (NWs), site-selectively grown by molecular beam epitaxy (MBE) on Si(111) substrates and passivated insitu with an according lattice matched In1−xAlxAs shell, were analyzed in depth using micro-photoluminescence (µ-PL). Varying both Ga- as well as Al-content allows for effective bandgap engineering, tuning the peak emission over a broad range across the important telecommunication regime. The core-shell NWs significantly enhance peak intensities compared to the unpassivated case with emission even up to room-temperature. This opens numerous opportunities for advanced NW-based heterostructures, such as integrated nanophotonic sources on Si (for hybrid III/V-Si photonics) and NW-based photovoltaics.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2015 > Berlin