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Unidirectional Ultracompact Optical Nanoantennas
Abstract
We report on a dramatic directionality effect in a simple and ultracompact optical nanoantenna consisting of a pair of interacting plasmonic nanoparticles. We found that the emission from a dipole source positioned close to one of the particles in the pair exhibits an essentially unidirectional radiation pattern for emission wavelengths close to the antiphase hybridized plasmon. We analyze this unique effect in terms of radiation, reception, and reciprocity concepts using electrodynamics simulations and dipole analysis. A forward-backward directionality of approximately 18 dB at 665 nm is obtained for a nanoantenna that consists of two 90 nm wide and 20 nm thick gold nanodisks separated by a 10 nm gap.
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Cites
Optical Constants of the Noble Metals
Johnson, P. B., & Christy, R. W. (1972) · Physical Review B · doi:10.1103/physrevb.6.4370 · Cited by 20,094
Cited by
Staude, I., Miroshnichenko, A. E., Decker, M., Fofang, N. T., Liu, S., Gonzales, E., Dominguez, J., Luk, T. S., Neshev, D. N., Brener, I., et al. (2013) · ACS Nano · doi:10.1021/nn402736f · Cited by 1,121
Fano Resonances in Plasmonic Nanoclusters: Geometrical and Chemical Tunability
Lassiter, J. B., Sobhani, H., Fan, J. A., Kundu, J., Capasso, F., Nordlander, P., & Halas, N. J. (2010) · Nano Letters · doi:10.1021/nl102108u · Cited by 632
Optical properties of metallic nanoparticles: manipulating light, heat and forces at the nanoscale
Coronado, E. A., Encina, E. R., & Stefani, F. D. (2011) · Nanoscale · doi:10.1039/c1nr10788g · Cited by 284
Metadata
- Authors
- Pakizeh, T., & Käll, M.
- Venue
- Nano Letters
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-05-07
- Volume
- 9
- Issue
- 6
- Pages
- 2343-2349
- ISSN
- 1530-6984 (ISSN-L)
- 1530-6992
- OpenAlex
- W2053823480
- Cited by
- 184
- References
- 1
- FWCI
- 10.48
- Type
- journal article
- Language
- en
- Open access
- closed
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