Abstract
Electromagnetic wave propagation in a structure comprising a magneto-optical layer placed on the top of a photonic crystal is theoretically studied. It is shown that the maximal rotation of the reflected wave polarization (Kerr–Faraday rotation) is achieved when wave vectors of TE and TM modes of the demagnetized structure are equal. The analysis of polarization ellipse—the Kerr–Faraday rotation angle—with respect to small changes of the dielectric permittivity of a medium adjoined to the magneto-optical layer demonstrated a high sensitivity of 25000°/RIU. We thus propose a novel design of perspective sensing elements for biosensing and chemical sensing.
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