Abstract

The phase shift upon reflection from one-dimensional photonic crystal composed of alternating layers of mu-negative materials and positive-index materials is numerically investigated. It is found that the phase difference between TE and TM reflected waves can remain constant in a rather wide frequency range within the single-negative gap of the proposed structure. Such property can be used to design broadband phase retarder. By varying the incident angle, the phase difference of the retarder can be adjusted from 0 to $\pi$, while the working frequency range of the retarder remains almost unchanged. Moreover, by varying the scaling factor or the thickness ratio of the two constituent materials, the working frequency range of the phase retarder can be conveniently tuned.

© 2012 Optical Society of America

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