Transmission enhancement of light through a metallic nano-slit with periodic metallic nano-strips
2009 (English)In: Metamaterials IV, SPIE - International Society for Optical Engineering, 2009, 73530S- p.Conference paper (Refereed)
The study of the transmission properties of subwavelength apertures has become a very active area of research in electromagnetism. It is generally accepted that structuring the input surface of the metal film by periodic corrugations is very effective in the process of transmission enhancement through single apertures. Here instead of periodic corrugations, we propose to use periodic nano-strips placed before the input surface of the metal film to enhance the transmission of light through a nano-slit milled in the film. Influences of the structural parameters of periodic nano-strips on the transmission enhancement are investigated. The transmission efficiency through a 25nm-width silver nano-slit can be boosted to be ç = 164 when six pairs of nano-strips are placed 50nm distant away from the incident surface of the silver film at ë0 = 1ìm, which is originally ç = 7.8 without any strips. This indicates that a large part of the incident light can be transformed into the localized guided wave with strong intensity, and then more light can flow through the nano-slit. We emphasize that periodic nano-strips can serve as an efficient receiving antenna to harvest light into the nano-slit.
Place, publisher, year, edition, pages
SPIE - International Society for Optical Engineering, 2009. 73530S- p.
, Proceedings of SPIE - The International Society for Optical Engineering, ISSN 0277-786X ; 7353
Extraordinary optical transmission, Fabry-Perot cavity, Nano-slit, Nano-strip, Plasmonic waveguide, Surface Plasmon Polaritons
Other Physics Topics
IdentifiersURN: urn:nbn:se:kth:diva-153583DOI: 10.1117/12.819919ISI: 000300018600020ScopusID: 2-s2.0-69949152618ISBN: 978-081947627-2OAI: oai:DiVA.org:kth-153583DiVA: diva2:754867
Metamaterials IV; Prague; Czech Republic; 20 April 2009 through 22 April 2009
QC 201410132014-10-132014-10-062014-10-13Bibliographically approved