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用于LWIR应用的全介电反射金属的设计和性能分析

Sani Mukhtar¹, Jaime Viegas²

¹Department of Electrical Engineering, Khalifa University of Science and Technology, Abu Dhabi, United Arab Emirates.

Scientific reports

|July 4, 2025

概括

这项研究探讨了用于长波红外 (LWIR) 应用的反射金属透镜. Si/ZnSe和GaAs/ZnO DBR基板显示出有希望的高聚焦效率和射有限性能.

科学领域:

光学和光子学在光学和光子学.
超材料是指一种超材料.
红外技术红外技术

背景情况:

反射金属镜头在长波红外 (LWIR) 频谱中提供低损失的波面控制.
它们的性能高度依赖于基板材料的选择,这一领域需要进一步探索.

研究的目的:

使用介电分布式布拉格反射器 (DBR) 基板数量研究LWIR反射金属镜.
评估各种半导体和基介电材料对金属性能的影响.

主要方法:

对九种DBR材料组合 (Si,Ge,GaAs,ZnO,ZnSe,ZnS) 的系统数值评估.
具有特定光圈直径,焦距和操作波长的金属透镜的设计.
对焦效率,反射率,焦点特征和相覆盖的分析.

主要成果:

所有设计都在广泛的光谱中实现了高反射率 (>0.9).
Si/ZnSe和GaAs/ZnO基板产生了最高的聚焦效率 (分别为0.75和0.72).
通过几乎完全的相覆盖,获得了衍射有限的焦点尺寸 (0.50.7μm).

结论:

DBR材料的选择显著影响LWIR反射金属的性能.
Si/ZnSe和GaAs/ZnO是高效率LWIR金属镜头的最佳材料组合.
优化的单元细胞周期和数值光圈增强了对焦能力.

关键词:

3D-FDTD 3D-FDTD 3D-FDTD 3D-FDTD 3D-FDTD 3D-FDTD 3D-FDTD 3D-FDTD 3D-FDTD 3D-FDTD 3D-FDTD 3D-FDTD 3D-FDTD 全消电光学是完全消电光学.合效应是一种合效应.的 DBRs 的 DBRs.聚焦效率的效率聚焦效率的效率长波红外线 (LWIR) 是指长波红外线.材料的选择材料的选择地表表层的表层.数字模拟数字模拟在光学性能方面,光学性能非常好.反射金属是反射的金属

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