Observation of enhanced transmission for s-polarized light through a subwavelength slit
Abstract
Enhanced optical transmission (EOT) through subwavelength apertures is usually obtained for p-polarized light. The present study experimentally investigates EOT for s-polarized light. A subwavelength slit surrounded on each side by periodic grooves has been fabricated in a gold film and covered by a thin dielectric layer. The excitation of s-polarized dielectric waveguide modes inside the dielectric film strongly increases the s-polarized transmission. Transmission measurements are compared with a coupled mode model and show good qualitative agreement. Adding a waveguide can improve light transmission through subwavelength apertures, as both s and p-polarization can be efficiently transmitted.
- Publication:
-
Optics Express
- Pub Date:
- April 2010
- DOI:
- 10.1364/OE.18.009722
- arXiv:
- arXiv:0912.2452
- Bibcode:
- 2010OExpr..18.9722G
- Keywords:
-
- Condensed Matter - Mesoscale and Nanoscale Physics;
- Condensed Matter - Other Condensed Matter
- E-Print:
- 11 pages, 3 figures, submitted to Applied Physics Letters