Single, double, and triple quantum dots in Ge/Si nanowires
Single, double, and triple quantum dots in Ge/Si nanowires
We report highly tunable control of holes in Ge/Si core/shell nanowires. We demonstrate the ability to create single quantum dots of various sizes, with low hole occupation numbers and clearly observable excited states. For the smallest dot size, we observe indications of single-hole occupation. Moreover, we create double and triple …