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Journal Article

Mode Matching for Optical Antennas

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Christiansen,  Silke
Christiansen Research Group, Research Groups, Max Planck Institute for the Science of Light, Max Planck Society;
Helmoltz-Center Berlin for Materials & Energy (HZB);
Free University of Berlin;

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Citation

Feichtner, T., Christiansen, S., & Hecht, B. (2017). Mode Matching for Optical Antennas. PHYSICAL REVIEW LETTERS, 119(21): 217401. doi:10.1103/PhysRevLett.119.217401.


Cite as: https://hdl.handle.net/21.11116/0000-0000-88D4-7
Abstract
The emission rate of a point dipole can be strongly increased in the presence of a well-designed optical antenna. Yet, optical antenna design is largely based on radio-frequency rules, ignoring, e.g., Ohmic losses and non-negligible field penetration in metals at optical frequencies. Here, we combine reciprocity and Poynting's theorem to derive a set of optical-frequency antenna design rules for benchmarking and optimizing the performance of optical antennas driven by single quantum emitters. Based on these findings a novel plasmonic cavity antenna design is presented exhibiting a considerably improved performance compared to a reference two-wire antenna. Our work will be useful for the design of high-performance optical antennas and nanoresonators for diverse applications ranging from quantum optics to antenna-enhanced single-emitter spectroscopy and sensing.