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Spectral Selective Absorption Enhancement in Photonic Crystal Defect Cavities

机译:光子晶体缺陷腔中的光谱选择性吸收增强

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In this paper, we present the simulation results on the absorption modification in a two-dimensional photonic crystal slab (2D PCS) structure, based on three-dimensional finite-difference time-domain technique (3D FDTD). Significantly enhanced absorption at defect level was obtained at surface normal direction in a single defect photonic crystal cavity, for both in-plane and vertical sources. An absorption enhancement factor in the range of 100-6,000 was obtained under different operation conditions, based on the normalized absorption power spectral density with respect to the reference slab without photonic crystals. Complete absorption suppression within the photonic bandgap region was also observed in defect-free cavities. High spectral selectivity and tunability was feasible with defect mode engineering.
机译:本文基于三维有限差分时域技术(3D FDTD),我们介绍了二维光子晶体板(2D PCS)结构中的吸收修改。 在单个缺陷光子晶体腔中,在平面内和垂直源处,在表面正常方向上获得显着增强的缺陷水平的吸收。 在不同的操作条件下,基于没有光子晶体的参考板的归一化吸收功率谱密度,在不同的操作条件下获得100-6,000的吸收增强因子。 在无缺陷空腔中也观察到光子带区域内的完全吸收抑制。 高光谱选择性和可调性与缺陷模式工程是可行的。

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