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O: Fachverband Oberflächenphysik

O 66: Plasmonics and nanooptics: Applications and other aspects II

O 66.9: Vortrag

Mittwoch, 14. März 2018, 17:15–17:30, MA 041

Electroluminescence from optical Yagi-Uda antennas — •Maximilian Ochs, René Kullock, Philipp Grimm, Monika Emmerling, and Bert Hecht — NanoOptics & Biophotonics Group, Experimental Physics 5, University of Würzburg, Germany

Light-based on-chip communication promises much higher data transfer rates than conventional electrical circuitry. One promising approach is the use of directional antennas, e.g. Yagi-Uda antennas which are very common in the radio frequency regime. Downscaling these systems to nanometer size would enable directional radiation of light, however, since for these frequencies no conventional electrical generators exist, so far they have only been driven optically [1].

Here, we demonstrate electrically-driven optical Yagi-Uda antennas based on dipole antennas [2], radiating directional with FB-ratios of around 5 dB. Light emission is facilitated by the quantum shot noise of electrons tunneling across the antenna gap upon applying a voltage. The presented fabrication yields a high reproducibility and we show that the directivity as well as the properties of the electroluminescence can be controlled by the antenna geometry. Our work paves the road for wireless communication on the nanometer scale between a set of individual antennas.
[1] A. Curto et al.,Science 329, 5994 (2010)
[2] J. Kern et al.,Nat. Photonics 9, 9 (2015)