Elliptical to Linear Polarization Transformation by a Grating on a Chiral Medium

Authors: Panin, S.B.¹; Smith, P.D.¹; Poyedinchuk, A.Y.²

Source: Journal of Electromagnetic Waves and Applications, Volume 21, Number 13, 2007 , pp. 1885-1899(15)

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Abstract:

The phenomenon of wave polarization conversion occurs when an electromagnetic wave of elliptical polarization is incident upon a layered structure comprising a strip grating, magnetodielectric layer, chiral layer, and screen. For suitable choice of structural parameters, we discovered regimes where the specularly reflected wave is nearly totally transformed into a linearly polarized wave. Due to the presence of a chiral medium, the corresponding diffraction problem is an intrinsically vectorial problem.

It is solved using an analytical regularization procedure based on the Riemann-Hilbert problem method and the obtained solution thus admits an effective numerical treatment.

It is shown that a nearly total polarization transformation can be realized for different elliptical polarisation parameters of the incident wave over a rather wide range of incident wave angles. The exhibition of polarization transformation is affected by the resonance properties of the grating-screen volume and by the grating. The purity of polarization conversion may be effectively controlled by careful choice of the structure parameters.

Document Type: Research article

DOI: http://dx.doi.org/10.1163/156939307781891030

Affiliations: 1: Department of Mathematics, Macquarie University, NSW 2109, Sydney, Australia 2: Department of Diffraction Theory and Diffraction Electronics, Institute for Radiophysics and Electronics of NAS of Ukraine, 12, Academic Proskura Str., 61085, Kharkov, Ukraine

Publication date: 2007-10-01