窄刻槽亚波长金属波导光栅透射滤波研究

发布时间：2018-04-17 04:16

本文选题：窄刻槽 + 金属波导光栅　；参考：《光通信研究》2017年01期

【摘要】：提出了一种窄刻槽亚波长金属波导光栅透射滤波器的设计,其工作原理是利用窄光栅刻槽取得低透射背景,再利用导模共振与表面等离子激元共振的混合产生峰值透射,进而实现良好的窄带透射滤波效应。研究发现,利用多模共振与表面等离子激元共振的混合模式,通过增加波导厚度即可实现性能良好的双通道透射滤波,在波长1 412和1 653nm处,峰值透射率分别为72.1%和63.6%。进一步分析表明,由于长波处磁场能量较多地局域在金属光栅层,峰值位置和峰值透射率受光栅深度变化影响显著;而短波处磁场能量较多地局域在波导层中,因此短波处峰值漂移对波导层厚度变化更为敏感。
[Abstract]:The design of a narrow groove subwavelength metal waveguide grating transmission filter is presented. The principle is to obtain a low transmission background by using a narrow grating groove, and then to produce a peak transmission by using the mixture of the guided mode resonance and the surface plasmon resonance.Furthermore, a good narrowband transmission filtering effect is realized.It is found that the dual-channel transmission filter with good performance can be realized by increasing the thickness of the waveguide in the mixed mode of multi-mode resonance and surface plasmon resonance. The peak transmittance at wavelength 1 412 and 1 653nm is 72.1% and 63.6%, respectively.Further analysis shows that the peak position and the peak transmittance are significantly affected by the depth of the grating because the energy of the magnetic field at the long wave is mostly localized in the metal grating layer, while the magnetic energy at the short wave is mostly localized in the waveguide layer.Therefore, the peak drift at the shortwave is more sensitive to the thickness of the waveguide layer.
【作者单位】：江南大学理学院光电信息科学与工程系;江南大学江苏省轻工光电工程技术研究中心;
【基金】：中央高校自主科研基金资助项目(JUSRP115A15) 江苏省轻工光电工程技术研究中心基金资助项目(BM2014402) 国家自然科学基金资助项目(61178032)
【分类号】：TN713

【相似文献】