Nanoscale Control of the Radiation Properties of Coupled Nanoantennas

Year: 2011

Authors: Locatelli A., Boscolo S., Capobianco A.-D., Midrio M., De Angelis C.

Autors Affiliation: Dipartimento di Ingegneria dell’Informazione, Università degli Studi di Brescia, Brescia 25123, Italy; Dipartimento di Ingegneria Elettrica, Gestionale e Meccanica, Università degli Studi di Udine, Udine 33100, Italy; Dipartimento di Ingegneria dell’Informazione, Università degli Studi di Padova, Padova 35131, Italy

Abstract: The peculiar properties of a pair of nanoantennas fed at a gap region have been studied. The possibility of controlling the radiation pattern at the nanoscale is demonstrated: indeed, unidirectional radiation can be obtained by placing two identical nanorods at a distance which is in the order of lambda/20 (in stark contrast with the typical quarter-wavelength spacing of Yagi-Uda antennas), and scales down with increasing effective index of the plasmonic mode of the single cylindrical rod. Powerful techniques borrowed from electrical engineering have been applied in order to justify in an elegant and straightforward way the behavior of the nanostructure at optical frequencies.

Journal/Review: IEEE PHOTONICS TECHNOLOGY LETTERS

Volume: 23 (20)      Pages from: 1541  to: 1543

More Information: This work was supported by Fondazione Cariplo, project METAMETA (Grant 2010-0595).
KeyWords: Antenna theory; integrated optics; nanoelectronics; nanophotonics; plasmons
DOI: 10.1109/LPT.2011.2163931

Citations: 3
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