Experimental quality factor determination of guided-mode resonances in photonic crystal slabs
Experimental quality factor determination of guided-mode resonances in photonic crystal slabs
复制标题
光子晶体板中导模谐振的实验品质因数测定
DOI：
10.1063/1.3058682
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发表时间：
2008
影响因子：
4
通讯作者：
M. Gerken
中科院分区：
文献类型：
--
作者：
Y. Nazirizadeh;U. Lemmer;M. Gerken
我们报告了一种如何在倒易空间中确定光子晶体板（PCS）中导模谐振品质因数的方法。通过 PCS 的传输测量是在 PCS 之前和之后使用交叉偏振滤光片进行的。因此，不需要的照明源被抑制，并且仅显示导模谐振。该方法允许在倒数空间中确定空间分辨的品质因数。作为示例，我们扫描二维 PCS 并可视化其不均匀性。尽管谐振波长变化仅为约 3 nm，但品质因数在 100 到 350 之间变化。
We report on a method how quality factors of guided-mode resonances in photonic crystal slabs (PCSs) can be determined in the reciprocal space. Transmission measurements through PCSs are performed using crossed polarization filters before and after the PCS. Consequently the unwanted illumination source is suppressed and only the guided-mode resonances are revealed. This method allows for a spatially resolved quality factor determination in the reciprocal space. As an example we scan a two-dimensional PCS and visualize its inhomogeneities. Although the resonance wavelength variations were only ≈3 nm, the quality factor varies from 100 to 350.