Journal
OPTICS EXPRESS
Volume 11, Issue 4, Pages 371-380Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.11.000371
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The anomalously-high transmission of light through subwavelength apertures is a phenomenon which has been observed in numerous experiments, but whose theoretical explanation is incomplete. In this article we present a numerical analysis of the power flow (characterized by the Poynting vector) of the electromagnetic field near a sub-wavelength sized slit in a thin metal plate, and demonstrate that the enhanced transmission is accompanied by the annihilation of phase singularities in the power flow near the slit. (C) 2003 Optical Society of America.
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