Theory of highly directional emission from a single subwavelength aperture surrounded by surface corrugations.
نویسندگان
چکیده
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, 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.
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عنوان ژورنال:
- Physical review letters
دوره 90 16 شماره
صفحات -
تاریخ انتشار 2003