Beaming light from a subwavelength metal slit surrounded by dielectric surface gratings

D. Z. Lin*, C. K. Chang, Yi-Chun Chen, D. L. Yang, M. W. Lin, J. T. Yeh, J. M. Liu, C. H. Kuan, C. S. Yeh, C. K. Lee

*Corresponding author for this work

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Abstract

In this article, we demonstrate that a subwavelength metal slit surrounded by dielectric surface gratings possesses a directional beaming effect. We propose a surface plasmon diffraction scheme to explain the three kinds of beaming conditions. The numerical simulations of the illustrative structures undertaken used a Finite Difference Time Domain (FDTD) Method and a Rigorous Coupled Wave Analysis (RCWA) Method. Our simulations were found to be consistent and in agreement with the experimental results. In comparison with other metal structures, we find that dielectric metal structures offer better performance as well as the advantage of being able to be efficiently mass produced for large volume industrial applications.

Original languageEnglish
Pages (from-to)3503-3511
Number of pages9
JournalOptics Express
Volume14
Issue number8
DOIs
StatePublished - 17 Apr 2006

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    Lin, D. Z., Chang, C. K., Chen, Y-C., Yang, D. L., Lin, M. W., Yeh, J. T., Liu, J. M., Kuan, C. H., Yeh, C. S., & Lee, C. K. (2006). Beaming light from a subwavelength metal slit surrounded by dielectric surface gratings. Optics Express, 14(8), 3503-3511. https://doi.org/10.1364/OE.14.003503