期刊
OPTICS EXPRESS
卷 17, 期 9, 页码 7361-7367出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.17.007361
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资金
- US National Science Foundation
- Air Force Office of Scientific Research (AFOSR)
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1115903] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1109591] Funding Source: National Science Foundation
This paper proposes a metallic hole array of a rectangular converging-diverging channel (RCDC) shape with extraordinary transmission. We use a three-dimensional (3D) finite element method to analyze the transmission characteristics of two-dimensional metallic hole arrays (2D-MHA) with RCDC. For a straight channel MHA, when the aperture size is reduced, the transmission peaks have a blue-shift. The same result is observed for a smaller gap throat for the RCDC structure. For the rectangular holes with a high length-width ratio, a similar blue-shift in the transmission peaks as well as a narrower full width at half maximum (FWHM) are observed. The asymmetry from the rectangular shape gives this structure high selectivity for light with different polarizations. Furthermore, the RCDC shape gives extra degrees of geometrical variables to 2D-MHA for tuning the location of the transmission peak and the FWHM. The tunable transmission property of this structure shows promise for applications in tunable filters, photonic circuits, and biosensors. (c) 2009 Optical Society of America
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