Light transmission through a high index dielectric-filled sub-wavelength hole in a metal film

Juuso Olkkonen, Kari Kataja, Dennis Howe

Research output: Contribution to journalArticle

22 Citations (Scopus)


We investigate transmission of a normally incident, linearly polarized plane wave through a circular sub-wavelength hole in a metal film filled by a high index dielectric medium. We demonstrate for the first time that the transmission efficiency of such holes exhibits a Fabry-Pérot-like behaviour versus thickness of the metal film, similar to that exhibited by sub-wavelength slits in metal films illuminated by TM-polarized plane waves. We show that by reducing the imaginary part of the propagation constant of the hybrid HE11 mode and by fortifying the Fabry-Pérot resonance, the high index dielectric filling can greatly enhance light transmission through a circular sub-wavelength hole.
Original languageEnglish
Pages (from-to)6980 - 6989
Number of pages10
JournalOptics Express
Issue number18
Publication statusPublished - 2005
MoE publication typeA1 Journal article-refereed


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