Excitonic optical nonlinearity induced by internal field screening in (211) oriented strained-layer superlattices
- 18 February 1991
- journal article
- conference paper
- Published by AIP Publishing in Applied Physics Letters
- Vol. 58 (7) , 684-686
- https://doi.org/10.1063/1.104568
Abstract
The nonlinear optical properties of a new class of strained‐layer superlattices (intrinsic Stark effect superlattices) have been investigated. Specifically, we have compared the nonlinear transmission of Ga1−xInxAs‐GaAs strained‐layer superlattices grown along the (211) axis to identical superlattices grown along the (100) axis, and found that the optical nonlinearity in the (211) sample is about one order of magnitude greater than in the (100) sample. A blue shift of the exciton resonance and an increase in the exciton absorption strength in the (211) sample with increasing light intensity was observed (attributed to screening of the intrinsic Stark effect fields by photogenerated carriers), resulting in the stronger optical nonlinearity. The maximum of the nonlinear absorption index, ‖α2‖, in the (211) sample was 54 cm/W (‖Im χ3‖=0.33 esu) whereas in the (100) sample the maximum of ‖α2‖ was 6.9 cm/W (‖Im χ3‖=0.042 esu). The measured carrier recovery time in both samples was 2 ns.Keywords
This publication has 10 references indexed in Scilit:
- Observation of room-temperature blue shift and bistability in a strained InGaAs-GaAs 〈111〉 self-electro-optic effect deviceApplied Physics Letters, 1990
- Modulation of internal piezoelectric fields in strained-layer superlattices grown along the [111] orientationJournal of Vacuum Science & Technology A, 1989
- Optical Properties of (100) - and (111)-Oriented GaInAs/GaAs Strained-Layer SuperlatticesPhysical Review Letters, 1989
- Study of the optical properties of (100) and (111) oriented GaInAs/GaAs strained-layer superlatticesSuperlattices and Microstructures, 1989
- Linear and nonlinear optical properties of semiconductor quantum wellsAdvances in Physics, 1989
- Nonlinear optical response of [111] growth axis strained-layer superlatticesJournal of Vacuum Science & Technology A, 1987
- Optical properties of strained-layer superlattices with growth axis along [111]Physical Review Letters, 1987
- Molecular-beam-epitaxial growth and selected properties of GaAs layers and GaAs/(Al,Ga)As superlattices with the (211) orientationJournal of Applied Physics, 1986
- Room temperature excitonic nonlinear absorption and refraction in GaAs/AlGaAs multiple quantum well structuresIEEE Journal of Quantum Electronics, 1984
- Nonlinear Optical Susceptibilities in Group-IV and III-V SemiconductorsPhysical Review B, 1968