Angle-insensitive and solar-blind ultraviolet bandpass filter.
Angle-insensitive and solar-blind ultraviolet bandpass filter.
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DOI：
10.1364/ol.39.005784
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发表时间：
2014-10
期刊：
影响因子：
3.6
通讯作者：
Sangsik Kim;Mengren Man;M. Qi;K. Webb
中科院分区：
文献类型：
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作者：
Sangsik Kim;Mengren Man;M. Qi;K. Webb
我们提出了一种金属-介质叠层紫外线(UV)带通滤光片，它拒绝了较长的波长，可见光谱，并且很薄，对入射角相对不敏感。金属-电介质界面反射相移的参数评估提供了洞察和设计信息。这种非平凡的相移允许亚波长介质膜厚度的耦合法布里-珀罗共振。此外，总相移由波的传播和非平凡的反射相移贡献，对入射角不敏感。通过设计介质厚度并选择具有适当等离子体频率的金属，可以将紫外光中的滤光片通带转换到可见或更长的波长。
We present a metal-dielectric stack ultraviolet (UV) bandpass filter that rejects the longer wavelength, visible spectrum and is thin and relatively insensitive to the angle of incidence. Parametric evaluations of the reflection phase shift at the metal-dielectric interface provide insight and design information. This nontrivial phase shift allows coupled Fabry-Perot resonances with subwavelength dielectric film thickness. Furthermore, the total phase shift, with contributions from wave propagation and nontrivial reflection phase shift, is insensitive to the angle of incidence. Filter passbands in the UV can be shifted to visible or longer wavelengths by engineering the dielectric thickness and selecting a metal with an appropriate plasma frequency.