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Circuit Model for Lamellar Metallic Gratings in the Sub-Wavelength Regime

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2 Author(s)
Khavasi, A. ; Electr. Eng. Dept., Sharif Univ. of Technol., Tehran, Iran ; Mehrany, K.

A circuit model is proposed for periodic 1-D array of metallic strips in the sub-wavelength regime. The parameters of the proposed circuit and their dependence on frequency are all explicitly given by closed form expressions. The necessity of using numerical simulation to extract model parameters is thus sidestepped. It is demonstrated that the proposed model is valid at different incident angles and for arbitrary surrounding mediums given that there is only one propagating diffracted order outside the grating and only one guided mode supported by the slits. Both major polarizations are studied in this paper.

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Quantum Electronics, IEEE Journal of  (Volume:47 ,  Issue: 10 )