Femtosecond Spatiotemporal Field Measurements in GaAs Quantum Wells,
Abstract
Excitonic electroabsorption has been used recently to detect ultrafast electrical transients in ultra-thin quantum well coplanar striplines with time resolution as fast at 180 fs . The use of thin films of quantum wells as both generator and detector of electrical signals with coplanar stripline interconnection results in several interesting capabilities. First, since the exciton exhibits a sensitive saturation response with resonant excitation, it can be used as an in-situ calibration of the excitation and probing response functions. This nonlinear response is instantaneous, since it is based on excitonic phase space filling . Second, the exciton exhibits sensitive electroabsorption in either parallel (field ionization mode) or perpendicular (quantum-confined stark effect - field ionization inhibited mode) electric fields.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 1992
- Accession Number
- ADP007637
Entities
People
- G. E. Doran
- Julie M. Cunningham
- M. Ramaswamy
- Stephen M. Goodnick
- W. H. Knox