Our paper on imaging single quantum dots has appeared in Nature Photonics. The paper describes how rapid adiabatic passage on a two-level system can be exploited as an on-off switch. This non-linearity enables imaging the quantum dot with a resolution much less than that of a confocal microscope: 30 nm (λ/31) was achieved in this experiment.

Left: image of quantum dots in a semiconductor recorded with a confocal microscope operating close to the diffraction limit. Right: image of the same quantum dots using the switching protocol based on rapid adiabatic passage.