Time-resolved DFWM, excite/probe and transient grating studies of InxGa1-xAs/GaAs superlattices
- 2 May 1994
- journal article
- Published by IOP Publishing in Semiconductor Science and Technology
- Vol. 9 (5) , 1096-1101
- https://doi.org/10.1088/0268-1242/9/5/014
Abstract
Low-temperature time-resolved degenerate four-wave mixing (DFWM), single-beam excite/probe and transient grating measurements have been performed on InxGa1-xAs/GaAs superlattices with thin ( approximately 6 nm) InxGa1-xAs wells. We find weak dephasing of heavy-hole (hh) excitons by acoustic phonons. The hh exciton homogeneous linewidth temperature coefficient is 1.9+or-1 mu eV K-1. The low-temperature hh exciton optical nonlinearity is successfully modelled in terms of exciton phase-space filling and exchange interactions in the hh exciton gas. From low-temperature transient grating measurements we find hh exciton in-plane mobilities as high as 6.7*104 cm2 V-1 s-1 and mobilities which are greater in superlattices with thinner barriers.Keywords
This publication has 14 references indexed in Scilit:
- Biexcitonic contribution to the degenerate-four-wave-mixing signal from a GaAs/As quantum wellPhysical Review B, 1991
- Picosecond room temperature excitonic-absorption saturation and four-wave mixing in InAs/GaAs short-period strained-layer superlatticesSuperlattices and Microstructures, 1990
- Quantum beats of free and bound excitons in GaAs/As quantum wellsPhysical Review B, 1990
- Electro-optical bistability in strained InxGa1−xAs/Al0.15Ga0.85As multiple quantum wellsApplied Physics Letters, 1990
- Line shape of time-resolved four-wave mixingPhysical Review A, 1990
- Quantum beats between the light and heavy hole excitons in a quantum wellSolid State Communications, 1990
- Transient grating studies of excitonic optical nonlinearities in GaAs/AlGaAs multiple-quantum-well structuresJournal of the Optical Society of America B, 1989
- Phase coherence and line broadening of free excitons in GaAs quantum wellsSuperlattices and Microstructures, 1986
- Room temperature excitonic nonlinear absorption and refraction in GaAs/AlGaAs multiple quantum well structuresIEEE Journal of Quantum Electronics, 1984
- Spatial Optical Parametric Coupling of Picosecond Light Pulses and Transverse Relaxation Effect in Resonant MediaJournal of the Physics Society Japan, 1979