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Semiconductor and Graphene Quantum Dots

March 25, 2013 - 12:30pm
Pawel Hawrylak
National Research Council of Canada

Title: Semiconductor and Graphene Quantum Dots
Abstract: We review progress in theory and experiments on semiconductor and graphene quantum dots with potential applications in nanoelectronics, nanospintronics, nanophotonics and quantum information processing. We describe lateral quantum dot molecules with controlled electron numbers in each dot and discuss potential use of such a molecule as a building block of a field effect transistor with a macroscopic quantum state, and on-chip GHZ state and Berrys and topological phase generators. We next turn to hybrid systems of self-assembled semiconductor quantum dots containing single magnetic impurities. Such impurities can be thought of as an atomic limit of quantum memory directly integrated into a semiconductor host. Finally, we describe one atom thick semiconductor quantum dots made of graphene. We show that their electronic, optical and magnetic properties can be engineered by the size, shape, type of edge and number of layers. We focus on their optical and magnetic properties, and their control with external gate, electric field and photons. Possibility of realizing a fully integrated carbon-only quantum circuit will be discussed.

1201 Physics Building
College Park, MD 20742