Demonstration of polarization-independent resonant subwavelength grating filter arrays.
Demonstration of polarization-independent resonant subwavelength grating filter arrays.
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DOI：
10.1364/ol.35.003201
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发表时间：
2010-10
期刊：
影响因子：
3.6
通讯作者：
D. Peters;R. Boye;J. Wendt;R. Kellogg;S. Kemme;T. Carter;S. Samora
中科院分区：
文献类型：
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作者：
D. Peters;R. Boye;J. Wendt;R. Kellogg;S. Kemme;T. Carter;S. Samora
我们展示了一个二维（2D）偏振无关的谐振亚波长光栅（RSG）的滤波器阵列。RSG，也称为导模谐振滤波器，传统上是一维光栅;然而，这导致TE和TM谐振在不同的波长和不同的光谱形状。二维光栅可以消除垂直入射时的偏振依赖性，同时保持高反射率、窄通带和低边带的理想RSG特性而没有涟漪。我们设计并制作了在电信波段垂直入射时对两种偏振具有几乎相同响应的二维光栅。百分之九十的反射率是在共振波长下实现的。
We demonstrate a two-dimensional (2D) polarization-independent resonant subwavelength grating (RSG) in a filter array. RSGs, also called guided mode resonant filters, are traditionally one-dimensional gratings; however, this leads to TE and TM resonances at different wavelengths and with different spectral shape. A 2D grating can remove the polarization dependence at normal incidence, while maintaining the desirable RSG properties of high reflectivity, narrow passband, and low sidebands without ripple. We designed and fabricated 2D gratings with near-identical responses for both polarizations at normal incidence in the telecommunication band. Ninety percent reflectivity is achieved at the resonant wavelengths.