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Enhanced transmission through arrays of subwavelength holes in gold films coated by a finite dielectric layer
KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.
2007 (English)In: Journal of the European Optical Society - Rapid Publications, ISSN 1990-2573, Vol. 2, 07009- p.Article in journal (Refereed) Published
Abstract [en]

Enhanced transmissions through a gold film with arrays of subwavelength holes are theoretically studied, employing the rigid full vectorial three dimensional finite difference time domain method. Influence of air-holes shape to the transmission is firstly studied, which confirms two different resonances attributing to the enhanced transmission: the localized waveguide resonance and periodic surface plasmon resonances. For the film coated with dielectric layers, calculated results show that in the wavelength region of interest the localized waveguide resonant mode attributes to sensing rather than the periodic gold-glass surface plasmon mode. Although the detected peak is fairly broad and the shift is not too pronounced, we emphasize the contribution for sensing from the localized waveguide resonant mode, which may opens up new ways to design surface plasmon based sensors.

Place, publisher, year, edition, pages
2007. Vol. 2, 07009- p.
Keyword [en]
transmission, surface plasmon, sensor
National Category
Atom and Molecular Physics and Optics
URN: urn:nbn:se:kth:diva-37311DOI: 10.2971/jeos.2007.07009ISI: 000206312800010ScopusID: 2-s2.0-34548401906OAI: diva2:433042
Available from: 2011-08-08 Created: 2011-08-08 Last updated: 2011-08-08Bibliographically approved

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Qiu, Min
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