Surface waves between metallic films and truncated photonic crystals observed with reflectance spectroscopy.
Surface waves between metallic films and truncated photonic crystals observed with reflectance spectroscopy.
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DOI：
10.1364/ol.33.000204
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发表时间：
2008-02
期刊：
影响因子：
3.6
通讯作者：
B. J. Lee;Y-B Chen;Z. M. Zhang
中科院分区：
文献类型：
--
作者：
B. J. Lee;Y-B Chen;Z. M. Zhang
我们分析和证明了表面波激发，通过在空气中传播波，在截断的光子晶体（PC）和银膜之间的界面在近红外。截断的PC由交替的SiO（2）和Si（3）N（4）层的几个晶胞制成。用超原胞法计算了表面波的色散关系。傅里叶变换红外光谱仪测量了不同入射角下制备样品的光谱反射率。角分辨激光散射仪测量在891 nm波长下作为入射角的函数的反射率。从实验中获得的共振条件和计算的色散关系之间的协议表明，在PC-银界面的表面波可以用来建立相干的热发射源。
We have analyzed and demonstrated surface-wave excitations, by propagating waves in air, at the interface between a truncated photonic crystal (PC) and a silver film in the near-infrared. The truncated PC was fabricated with several unit cells of alternating SiO(2) and Si(3)N(4) layers. The dispersion relation of surface waves was calculated using the supercell method. A Fourier-transform infrared spectrometer measured the spectral reflectance of the fabricated sample at different incidence angles. An angle-resolved laser scatterometer measured the reflectance as a function of the incidence angle at the wavelength of 891 nm. The agreement between the resonance conditions obtained from experiments and the calculated dispersion relation manifests that surface waves at the PC-Ag interface may be utilized to build coherent thermal-emission sources.