Design of diamond-shape photonic crystal fiber polarization filter based on surface plasma resonance effect<xref rid="cpb_29_3_034208fn1" ref-type="fn">*</xref><fn id="cpb_29_3_034208fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 61875238 and 61935007).</p></fn>

Design of diamond-shape photonic crystal fiber polarization filter based on surface plasma resonance effect**

Project supported by the National Natural Science Foundation of China (Grant Nos. 61875238 and 61935007).

Zhang Yongxia¹, Yuan Jinhui^{1, 2, †}, Qu Yuwei², Zhou Xian¹, Yan Binbin², Wu Qiang³, Wang Kuiru², Sang Xinzhu², Long Keping¹, Yu Chongxiu²

(a) The real part of the effective refractive indices of the core modes and the x-polarized SPP modes, and (b) the confinement losses of the x- and y-polarized core modes. The insets showing the electric field distributions of the core modes at different wavelengths.