Indistinguishable photons from independent semiconductor nanostructures.
We demonstrate quantum interference between photons generated by the radiative decay processes of excitons that are bound to isolated fluorine donor impurities in ZnSe/ZnMgSe quantum-well nanostructures. The ability to generate single photons from these devices is confirmed by autocorrelation experiments, and the indistinguishability of photons emitted from two independent nanostructures is confirmed via a Hong-Ou-Mandel dip. These results indicate that donor impurities in appropriately engineered semiconductor structures can portray atomlike homogeneity and coherence properties, potentially enabling scalable technologies for future large-scale optical quantum computers and quantum communication networks.
Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305-4088, USA. sanaka@stanford.edu
Kaoru
K
Sanaka
Alexander
A
Pawlis
Thaddeus D
TD
Ladd
Klaus
K
Lischka
Yoshihisa
Y
Yamamoto