Direct observation of dynamic surface acoustic wave controlled carrier injection into single quantum posts using phase-resolved optical spectroscopy
Abstract
A versatile stroboscopic technique based on active phase-locking of a surface acoustic wave to picosecond laser pulses is used to monitor dynamic acoustoelectric effects. Time-integrated multichannel detection is applied to probe the modulation of the emission of a quantum well for different frequencies of the surface acoustic wave. For quantum posts we resolve dynamically controlled generation of neutral and charged excitons and preferential injection of holes into localized states within the nanostructure.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 10, 2011
- Source ID
- 10.1063/1.3541881
Entities
People
- Achim Wixforth
- F. J. R. Schülein
- F. Knall
- H. J. Krenner
- H. Kim
- P. M . Petroff
- S. Völk
- T. A. Truong
Organizations
- Defense Advanced Research Projects Agency
- National Science Foundation
- University of Augsburg
- University of California, Santa Barbara