A single metallic nanoslit is employed for investigating the contribution of Surface Plasmon Polaritons(SPPs) to Extraordinary Optical Transmission(EOT) based on rigorous electromagnetic theory and the Spectrum Analys...A single metallic nanoslit is employed for investigating the contribution of Surface Plasmon Polaritons(SPPs) to Extraordinary Optical Transmission(EOT) based on rigorous electromagnetic theory and the Spectrum Analysis Method(SAM). Numerical results shows that the SPP is the main factor responsible for the EOT, and a phase singularity is observed.展开更多
研究了一种基于超材料的光学太阳反射镜(optical solar reflector,OSR),其由掺铝氧化锌(AZO)超表面、MgF2介质层和Ag金属反射层三层结构组成。在热红外AZO超表面激发表面等离激元共振增强电磁吸收,MgF2介质层介电常数的稳定性减少了吸...研究了一种基于超材料的光学太阳反射镜(optical solar reflector,OSR),其由掺铝氧化锌(AZO)超表面、MgF2介质层和Ag金属反射层三层结构组成。在热红外AZO超表面激发表面等离激元共振增强电磁吸收,MgF2介质层介电常数的稳定性减少了吸收振荡带来的反射,在可见光照射下AZO超表面和MgF2介质层的透明特性可降低太阳辐射损耗,Ag金属反射层可有效抑制透射。仿真结果表明,优化后的OSR在0.3~2.5μm内有17.6%的低太阳吸收率,在2.5~30.0μm内有86.5%的高红外发射率。此外,偏振和入射角度对其性能影响较小。该结构在红外波段实现了较好的吸收,在红外热成像、辐射制冷等领域也具有潜在应用价值。展开更多
基金supported by the National Basic Research Program of China(Grant No.2006CB302901)the InnovationTeam Development Program of the Chinese Ministry of Education(Grant No.IRT0606)
文摘A single metallic nanoslit is employed for investigating the contribution of Surface Plasmon Polaritons(SPPs) to Extraordinary Optical Transmission(EOT) based on rigorous electromagnetic theory and the Spectrum Analysis Method(SAM). Numerical results shows that the SPP is the main factor responsible for the EOT, and a phase singularity is observed.
文摘研究了一种基于超材料的光学太阳反射镜(optical solar reflector,OSR),其由掺铝氧化锌(AZO)超表面、MgF2介质层和Ag金属反射层三层结构组成。在热红外AZO超表面激发表面等离激元共振增强电磁吸收,MgF2介质层介电常数的稳定性减少了吸收振荡带来的反射,在可见光照射下AZO超表面和MgF2介质层的透明特性可降低太阳辐射损耗,Ag金属反射层可有效抑制透射。仿真结果表明,优化后的OSR在0.3~2.5μm内有17.6%的低太阳吸收率,在2.5~30.0μm内有86.5%的高红外发射率。此外,偏振和入射角度对其性能影响较小。该结构在红外波段实现了较好的吸收,在红外热成像、辐射制冷等领域也具有潜在应用价值。
