Abstract
We have investigated the thermal dependence of low-frequency current oscillations in the range of 140–400 K for semi-insulating (SI) GaAs resistor structures illuminated with sub-band-gap light. We have also investigated the spectral dependence of the low-frequency current oscillations in SI GaAs for illumination in the range of 0.85–1.25 μm. We find that the oscillation frequency is proportional to the carrier concentration. The thermal and the spectral measurement results both support the hypothesis that the low-frequency oscillations are caused by carriers interacting with the EL2 level and that the presence of holes can significantly alter the oscillation frequency. The behavior of the oscillations can be qualitatively described by a simple empirical expression with the assumption that EL2 exhibits field-enhanced capture from the Γ valley, although the exact behavior of the enhanced capture is not fully understood.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
