Optical antennas for quantum emitters
2011
Optical antennas are nanoscale versions of radio antennas and have emerged in recent years as an
enabling technology for nanophotonic devices. In particular, they open interesting avenues to control
and enhance the emission of single quantum emitters such as molecules and quantum dots. The
ability to modify transition rates, polarization and angular radiation patterns of fluorescence could
improve the performance of single-photon sources and ultrasensitive biosensors. In this
contribution, we review the state of the art of optical antennas, focusing especially on the activities of
the Molecular Nanophotonics group at ICFO. We describe the possible resonant modes of nanorod
optical antennas, address the controlled coupling of single emitters to a nanoantenna with two
different experimental approaches, and show the realization of optical monopole and Yagi-Uda
antennas to direct the emission of single emitters
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