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Opt Lett. 2010 Jan 15;35(2):127-9. doi: 10.1364/OL.35.000127.

Interference and horizontal Fabry-Perot resonance on extraordinary transmission through a metallic nanoslit surrounded by grooves.

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  • 1State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineeringand Computer Science, Peking University, Beijing 100871, China.


The debate on the underlying physics of the extraordinary optical transmission (EOT) through a metallic nano-slit surrounded with periodic grooves is largely resolved. We clarify that the EOT originates from the interference between the slit modes excited by the incident light and by the groove-generated surface plasmon polaritons modulated by the horizontal Fabry-Perot resonance effect due to the surrounding grooves. The quantitative model derived will greatly simplify the design of such structures.

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