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Phys Rev Lett. 2005 Sep 2;95(10):103901. Epub 2005 Aug 31.

Transmission of light through a single rectangular hole.

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Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, Spain.


We show that a single rectangular hole in a metallic film exhibits transmission resonances that appear near the cutoff wavelength of the hole waveguide. For light polarized with the electric field pointing along the hole's short axis, it is shown that the normalized-to-area transmittance at resonance is proportional to the ratio between the long and short sides, and to the dielectric constant inside the hole. Importantly, this resonant transmission process is accompanied by a huge enhancement of the electric field at both entrance and exit interfaces of the hole.

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