An optical nanoantenna made of plasmonic chain resonators

MARCELO LESTER,; DIANA CARINA SKIGIN

Journal of Optics

institute of Physics Publishing

Año: 2011 vol. 13 p. 35105 - 35112

2040-8978

We propose a novel structure that behaves like an optical antenna and converts evanescentwaves into propagating waves. The system comprises metallic subwavelength cylindersdistributed in a dual-period array. It is illuminated by an evanescent wave generated by totalinternal reflection in a close interface. For particular wavelengths, the system exhibitsresonances and the inhomogeneous wave is converted into propagating waves that radiate to the far field. This effect can be controlled by varying the geometrical parameters of the structure, such as the period and the inclination angle. Therefore, the transmitted intensity can be sent to a predesigned direction. This structure could be used in highly sensitive detection devices, among other applications.