Enhanced nonresonant light transmission through subwavelength slits in metal

Optics Letters
Anders PorsSergey I Bozhevolnyi

Abstract

We analytically describe light transmission through a single subwavelength slit in a thin perfect electric conductor screen for the incident polarization being perpendicular to the slit, and derive simple, yet accurate, expressions for the average electric field in the slit and the transmission efficiency. The analytic results are consistent with full-wave numerical calculations and demonstrate that slits of widths ∼100  nm in real metals may feature nonresonant (i.e., broadband) field enhancements of ∼100 and transmission efficiency of ∼10 at infrared or terahertz frequencies, with the associated metasurface-like array of slits becoming transparent to the incident light.

References

Jun 21, 2001·Physical Review Letters·Y Takakura
Aug 23, 2002·Physical Review Letters·Fuzi Yang, J R Sambles
Jun 6, 2003·Physical Review Letters·F J García-VidalL Martín-Moreno
Jan 5, 2007·Nature·C Genet, T W Ebbesen
Nov 9, 2007·Annual Review of Physical Chemistry·James V CoeKenneth R Rodriguez
Dec 7, 2007·Optics Letters·T ThioT W Ebbesen
Aug 6, 2009·Optics Express·J W LeeDaniel M Mittleman

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Citations

Apr 4, 2017·Scientific Reports·Om Krishna SuwalDai-Sik Kim
Nov 7, 2019·Advanced Materials·Ren-Hao FanMu Wang

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