The 1/f noise in a tunnelling current through a GaAs quantum dot (QD) was investigated. The fluctuation of the tunnelling current was measured with a spectrum analyzer. It was observed that the potential fluctuation increased linearly with temperature. A very slight increase in the fluctuation was observed when electrons were injected into excited states of the quantum dot. The results show that the current noise can be understood as a fluctuation of the confinement potential.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)