nPEG-Dipartimento di Ingegneria Elettrica e dell'Informazione Politecnico di Bari, Bari, Italy.
Opt Lett. 2013 Aug 1;38(15):2904-6. doi: 10.1364/OL.38.002904.
In this Letter, the study of a periodic structure composed of gold strips arranged in double-period unit cells, in a symmetric and asymmetric environment, is reported. The spectral maps show that the formation of the plasmonic bandgap and the extraordinary optical transmission are subjected to the proportion between the strip widths. Moreover, when the asymmetric environment is considered, high-transmittance and high-absorbance states arise. Hence, by controlling the geometrical parameters of the binary-periodic structure, it is possible to tailor the spectral response of the grating enhancing the desired features and exploiting them for different applications.
在这封信件中，报道了一种由排列在双周期单元中的金带组成的周期性结构的研究，该结构处于对称和非对称环境中。光谱图表明，等离子体带隙和超光透射的形成受到条带宽度比例的影响。此外，当考虑非对称环境时，会出现高透过率和高吸收率状态。因此，通过控制二元周期性结构的几何参数，可以调整光栅的光谱响应，增强所需的特性，并将其应用于不同的应用中。
