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Emission spectroscopy of ZnO inverse opal photonic crystals

机译：ZnO反蛋白石光子晶体的发射光谱

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摘要

Light emitted within a photonic crystal structure can be used to probe both the photonic density of states and the anisotropic propagation of light through the structure. Here we present results of angle- and polarization-resolved measurements of photoluminescence from three-dimensional ZnO photonic crystals. The ZnO inverse opals were fabricated by infiltration of polystyrene synthetic opal templates using atomic layer deposition. The resulting nanocrystalline ZnO structures exhibit strong UV emission as well as a broad defect emission peak, allowing us to observe the dispersion of the primary as well as higher-order PBGs over the entire visible spectrum. The spontaneous emission spectrum is strongly modified and anisotropic due to the effect of the photonic band structure. The observed features are correlated to transmission and reflection measurements as well as calculated (reduced) band structures in the Γ-L-K plane of the fcc Brillouin zone. Apart from the suppression and redistribution of light near the primary and higher band gaps, we observe a strong enhancement in the PL peaks due to light propagation in higher (e.g. 5th and 6th) photonic bands at frequencies and angles where no PBG exists.
机译：在光子晶体结构内发射的光可用于探测状态的光子密度和光通过结构的各向异性传播。在这里，我们呈现来自三维ZnO光子晶体的光致发光的角度和极化分辨测量的结果。通过使用原子层沉积通过渗透聚苯乙烯合成蛋白质模板来制造ZnO反蛋白。所得纳米晶ZnO结构具有强紫外线发射以及宽缺陷发射峰，允许我们观察初级以及高阶PBG在整个可见光谱上的分散。由于光子带结构的效果，自发发射光谱被强烈修改和各向异性。观察到的特征与传输和反射测量相关，以及在FCC布里渊区的γ-L-k平面中计算的（减小的）带结构。除了初级和更高频段间隙附近的抑制和再分配外，我们观察PL峰的强大增强由于在频率和角度的频率和角度下的频率高（例如第5和第6个）光子带中的光传播。

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