Large Excitonic Blue-Shift and Nonlinearity in Narrow Asymmetric Coupled Quantum Wells,
Abstract
Conventional self-electrooptic effect device (SEED) is based on the so-called quantum-confined Stark effect (QCSE), which results in the red-shift of the effective bandgap. Thus, it has significant residual absorption and requires high operational voltage. In the attempt to overcome these disadvantages, the so-called blue-shifting SEED schemes were proposed. Blue-shifting SEED can be based on QCSE in strained <111> structures and Wannier-Stark localization. Here, we report our observation of blue-shift of heavy-hole excitonic transition and third-order optical nonlinearity in narrow GaAs/Al.Ga1-xAs asymmetric coupled quantum wells (ACQW's) based on the anticrossing of strongly coupled heavy-hole levels in two narrow ACQW's for the first time.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 1992
- Accession Number
- ADP007836
Entities
People
- C. L. Guo
- J. B. Khurgin
- K. K. Law
- Shengxi Li
- Y. J. Ding
Organizations
- Johns Hopkins University