A gate-defined silicon quantum dot molecule

3 Jun 2008 · H. W. Liu, T. Fujisawa, H. Inokawa, Y. Ono, A. Fujiwara, Y. Hirayama ·

We report electron transport measurements of a silicon double dot formed in multi-gated metal-oxide-semiconductor structures with a 15-nm-thick silicon-on-insulator layer. Tunable tunnel coupling enables us to observe an excitation spectrum in weakly coupled dots and an energy level anticrossing in strongly coupled ones. Such a quantum dot molecule with both charge and energy quantization provides the essential prerequisite for future implementation of silicon-based quantum computations.

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A gate-defined silicon quantum dot molecule

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