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Quantum dots

Artificial atoms for quantum optics

Colloidal quantum dots are efficient nanoscopic light emitters with interesting applications from optoelectronics to biomedical imaging. Their polarizability has now been measured directly by probing the electronic response without electrical contacts.

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Figure 1: Schematic view of the terahertz polarizability of a photoexcited exciton in a colloidal semiconductor quantum dot.

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Bratschitsch, R., Leitenstorfer, A. Artificial atoms for quantum optics. Nature Mater 5, 855–856 (2006). https://doi.org/10.1038/nmat1768

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