Phys. Rev. Lett. 90, 167401 (2003) [4 pages]Theory of Highly Directional Emission from a Single Subwavelength Aperture Surrounded by Surface Corrugations
See accompanying Physics Focus We present a theoretical foundation for the beaming of light displayed by a single subwavelength aperture in an appropriately corrugated metal film [ H. J. Lezec et al. Science 297 820 (2002)]. Good agreement is found between calculations and experimental data. We show that beaming is due to the formation of electromagnetic surface resonances and that the beam direction, width, and wavelength at which it occurs can be selected by tuning geometrical parameters of the structure. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.167401
DOI:
10.1103/PhysRevLett.90.167401
PACS:
78.66.Bz, 42.79.Dj, 71.36.+c, 73.20.Mf
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