Coherent population trapping

Quantum optics with dots

The ability to optically drive a single electron spin confined to a quantum dot from an absorbing state to a trapped coherent dark state could be the key to realizing optical switches and other quantum optical devices.

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Figure 1: Three-level lambda system prepared by Xu et al.2 for the demonstration of coherent population trapping.

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Bayer, M. Quantum optics with dots. Nature Phys 4, 678–679 (2008). https://doi.org/10.1038/nphys1065

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