Tesina realitzada en col.laboració amb l'Institut de Ciències Fotòniques

We address experimentally the radiation patterns of quantum dots coupled to optical nanoantennas at speci c positions. We show that the emission of the coupled system is determined by a variety of resonant and non-resonant antenna modes both in polarization and angular pattern. The rst working optical Yagi-Uda antenna is presented and unidirectional emission is demonstrated for a limited spectral bandwidth. Our results show that the Yagi-Uda radiative e ciency is comparable to that of a half-wave dipole antenna.