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Optically Bright Quantum Dots in Single Nanowires

2005; American Chemical Society; Volume: 5; Issue: 7 Linguagem: Inglês

10.1021/nl050802y

1530-6992

Magnus T. Borgström, Valéry Zwiller, E. Müller, Ataç İmamoğlu,

Advancements in Semiconductor Devices and Circuit Design

We fabricate and demonstrate optically active quantum dots embedded in single nanowires. Observation of photon antibunching proves the zero dimensionality of these heterostructures that can be epitaxially grown on various substrates, including silicon. We show that the nanowire dots are intense single photon sources, typically an order of magnitude brighter than self-assembled quantum dots. Due to control over their composition, size, and position, nanowire dots are ideal building blocks for fully controlled quantum dot molecules.