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Proceedings Paper

Super-directive beam from metamaterials
Author(s): Vito Mocella; Principia Dardano; Ivo Rendina; Stefano Cabrini
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Paper Abstract

In a quasi- zero-average-refractive-index (QZAI) metamaterial, the light scattered out is extremely directive (Δθout = 0.06°), in despite of a divergent source at near infrared wavelength (λ=1.55 mm). In this paper we discuss and experimentally demonstrate that this is possible when the light is coupled with diffraction order of a grating with alternating complementary media. The experimental data prove with a high degree of accuracy also the strong vertical confinement of the beam even in the air region of the metamaterial, where any simple vertical confinement mechanism is absent. This extremely sensitive device works on a large contact area and open news perspective to integrated spectroscopy.

Paper Details

Date Published: 31 May 2011
PDF: 7 pages
Proc. SPIE 8069, Integrated Photonics: Materials, Devices, and Applications, 80690G (31 May 2011); doi: 10.1117/12.887746
Show Author Affiliations
Vito Mocella, CNR-IMM (Italy)
Principia Dardano, CNR-IMM (Italy)
Ivo Rendina, CNR-IMM (Italy)
Stefano Cabrini, Lawrence Berkeley National Lab. (United States)

Published in SPIE Proceedings Vol. 8069:
Integrated Photonics: Materials, Devices, and Applications
Ali Serpengüzel; Giancarlo Cesare Righini; Alfred Leipertz, Editor(s)

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