Photocurrent self-oscillations in a spatially direct GaAs/AlGaAs superlattice

Authors
Tomlinson, AM Fox, AM Cunningham, JE Jan, WY
Citation
Am. Tomlinson et al., Photocurrent self-oscillations in a spatially direct GaAs/AlGaAs superlattice, APPL PHYS L, 75(14), 1999, pp. 2067-2069
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
75
Issue
14
Year of publication
1999
Pages
2067 - 2069
Database
ISI
SICI code
0003-6951(19991004)75:14<2067:PSIASD>2.0.ZU;2-A
Abstract
We report the observation of self-sustained photocurrent oscillations in a weakly coupled spatially direct intrinsic GaAs/Al0.3Ga0.7As superlattice. T he oscillations are attributed to the dynamics of unstable electric field d omains related to the Gamma-Gamma e1-e2 tunneling resonance. The observed o scillation period is much longer than the carrier recombination time and th e interwell tunneling time. The nonlinear behavior shows a complex dependen ce on the optical power and the external bias. (C) 1999 American Institute of Physics. [S0003-6951(99)00640-3].