We demonstrate theoretically a polarization-independent guided-mode resonant filter with only a one dimensional grating. A rigorous method, the modal method by Fourier expansion, is used to compute the diffracted efficiencies of the grating. Wave-vector analysis fails to correctly design a polarization-independent structure. We show that a rigorous analysis of the resonances must be employed to obtain such a device; using a pole approach, we study the effects of grating parameters on the resonances of both polarizations.
© 2003 Optical Society of America
Dominique Lacour, Gérard Granet, Jean-Pierre Plumey, and Alain Mure-Ravaud, "Polarization independence of a one-dimensional grating in conical mounting," J. Opt. Soc. Am. A 20, 1546-1552 (2003)