Giant enhancement of Kerr rotation in two-dimensional Bismuth iron garnet/Ag photonic crystals

Author: Hong Liang   Huan Liu   Qiang Zhang   Shu-Fang Fu   Sheng Zhou   Xuan-Zhang Wang  

Publisher: IOP Publishing

E-ISSN: 1741-4199|24|6|67807-67811

ISSN: 1674-1056

Source: Chinese Physics B, Vol.24, Iss.6, 2015-06, pp. : 67807-67811

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Abstract

Kerr effects of two-dimensional (2D) Bismuth iron garnet (BIG)/Ag photonic crystals (PCs) combined magnetic and plasmonic functionalities is investigated with the effective medium theory. An analytical expression of Kerr rotation angles is derived, in which the effects of the surface pasmons polaritons (SPP) on magneto–optical (MO) activities are reflected. The largest enhancement of Kerr rotation up to now is demonstrated, which is improved three orders of magnitude compared with that of BIG film. When λ < 750 nm all of the reflection are over 10% for the arbitrary filling ratio f1, in addition, the enhancement of Kerr rotation angles are at least one order of magnitude.