Near-field Moire effect with dielectric-metal-dielectric sandwich structure

作者：Zhang, Shuxia; Liu, Shuai; Yang, Xuefeng^*; Wang, Changtao; Luo, Xiangang

来源：Journal of Nanophotonics, 2013, 7: 073080.

DOI：10.1117/1.JNP.7.073080

• Moire effect
• unmatched medium
• visibility

The visibility of Moire fringes is a major feature for their application in optical metrology. With the help of surface plasmon polariton (SPP) waves excited for a metal layer whose permittivity match with that of its dielectric partner, the visibility of Moire fringes is improved. For a dielectric-metal-dielectric sandwich structure between two subwavelength gratings with the optimum thicknesses of the layers but not appropriately matched permittivity, we found that it is easy to achieve a remarkable enhancement (visibility up to 0.88) of the Moire fringes facilitated by the excitation of SPP waves.

• 出版日期2013-10-17
• 单位中国科学院光电技术研究所; 河南理工大学