Angular Radiation Patterns of Nanoantennas: an Optical Yagi-uda Antenna
نویسندگان
چکیده
We address experimentally the radiation patterns of quantum dots coupled to optical nanoantennas at specific 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 first 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 efficiency is comparable to that of a half-wave dipole antenna.
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