Selective growth of site-controlled Quantum Dots

The development of single photon sources is of great interest for both fundamental studies and further development of long-distance quantum cryptography. Semiconductor Quantum Dots (QDs) based on III–V materials are of special interest for this purpose since they can be inserted into microcavities to benefit from Purcell effect. The Stranski-Krastanow (SK) growth mode is the widely used method to synthesize self-assembled QDs. However, the random distribution of the SK QDs does not allow a deterministic localization of the QDs, required for the spatial localization of a single QD on the electromagnetic-field maximum of a cavity.