Ultrafast Nonlinear Transmission Changes in a GaAs Single Quantum Well Waveguide Structure Suitable for Ultrafast All-Optical Switches,
Abstract
We have previously demonstrated picosecond all-optical switching in a waveguide directional coupler. It was shown that cross-well carrier sweep-out could be used to increase the recovery speed of the device by over an order of magnitude by employing a p-i-n doped structure. In this work, we report time resolved measurements of optical nonlinearities in a waveguide structure containing a single GaAs quantum well which exhibits a fast recovery without the need for an applied electric field. We observe phenomena associated with exciton absorption quenching and screening of the internal field resulting in a dynamic shift of absorption edge by the quantum confined Stark effect.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1992
- Accession Number
- ADP008169
Entities
People
- A. Cavaillès
- A. L. Moretti
- Alex M. Miller
- P. K. Wa
- R. Bambha
Organizations
- University of Central Florida