Terhertz Absorption between Split Subbands in Coupled Quantum Wells,
Abstract
Two quantum systems with energy levels in resonance with each other experience a splitting of these levels when the wavefunctions of the systems overlap. In semiconductor structures consisting of pairs of closely spaced quantum wells the wavefunction overlap of charge carriers in the wells leads to a novel kind of intersubband transition. To date, this transition has been studied by interband absorption and luminescence and, most recently, by four-wave-mixing experiments Leo, 1990. Here, we report of the first direct absorption measurements of the split-subband transition in coupled quantum wells.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 1992
- Accession Number
- ADP007882
Entities
People
- Ben Tell
- Hartmut Roskos
- Jack Cunningham
- Jagdeep Shan
- Martin C. Nuss