Multiple paths to enhance optical transmission through a single subwavelength slit.

  title={Multiple paths to enhance optical transmission through a single subwavelength slit.},
  author={Francisco J Garc{\'i}a-Vidal and Henri J. Lezec and Thomas W Ebbesen and Luis Martin-Moreno},
  journal={Physical review letters},
  volume={90 21},
In this Letter, we explore transmission properties of a single subwavelength slit flanked by a finite array of grooves made on a thick metallic film. We identify three main mechanisms that can enhance optical transmission: groove cavity mode excitation (controlled by the depth of the grooves), in-phase groove reemission (controlled by the period of the groove array), and slit waveguide mode (controlled by the thickness of the metal film). By tuning these geometrical parameters, enhancements of… CONTINUE READING
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