Gansch Roman, Kalchmair Stefan, Detz Hermann, Andrews Aaron M, Klang Pavel, Schrenk Werner, Strasser Gottfried
Center for Micro- and Nanostructures, Vienna University of Technology, Floragasse 7, 1040 Vienna, Austria.
Opt Express. 2011 Aug 15;19(17):15990-5. doi: 10.1364/OE.19.015990.
We present a detailed investigation of higher order modes in photonic crystal slabs. In such structures the resonances exhibit a blue-shift compared to an ideal two-dimensional photonic crystal, which depends on the order of the slab mode and the polarization. By fabricating a series of photonic crystal slab photo detecting devices, with varying ratios of slab thickness to photonic crystal lattice constant, we are able to distinguish between 0th and 1st order slab modes as well as the polarization from the shift of resonances in the photocurrent spectra. This method complements the photonic band structure mapping technique for characterization of photonic crystal slabs.
我们对光子晶体平板中的高阶模式进行了详细研究。在这类结构中，与理想二维光子晶体相比，共振呈现出蓝移，这取决于平板模式的阶数和偏振。通过制造一系列平板厚度与光子晶体晶格常数比例不同的光子晶体平板光电探测器件，我们能够根据光电流谱中共振的移动来区分零阶和一阶平板模式以及偏振。该方法补充了用于表征光子晶体平板的光子能带结构映射技术。
