Skigin D C, Depine R A
Grupo de Electromagnetismo Aplicado, Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón I, 1428 Buenos Aires, Argentina.
Phys Rev E Stat Nonlin Soft Matter Phys. 2001 Apr;63(4 Pt 2):046608. doi: 10.1103/PhysRevE.63.046608. Epub 2001 Mar 27.
We study surface plasmon polariton excitations and surface shape resonances in a lossy metallic grating with bivalued cavities. The modal formalism is used to solve the diffraction problem for the infinite grating and the homogeneous problem for a single cavity in a plane surface. Both polarization modes are considered. We provide curves of reflected efficiency versus wavelength as well as near-field plots. The resonances are identified as dips in the reflected efficiency, which imply significant power absorptions. Results for various depths of the cavities and for several angles of incidence are shown, where the different types of resonant behavior can be appreciated. Particular attention is paid to the changes introduced by the finite conductivity of the metal in relation to the results obtained for a perfect conductor.
我们研究了具有双值腔的有损金属光栅中的表面等离子体激元激发和表面形状共振。采用模态形式来求解无限光栅的衍射问题和平面表面单个腔的均匀问题。考虑了两种偏振模式。我们给出了反射效率与波长的关系曲线以及近场图。共振被识别为反射效率中的凹陷，这意味着有显著的功率吸收。展示了不同腔深度和几个入射角的结果，从中可以看出不同类型的共振行为。特别关注了金属有限电导率相对于理想导体所得到的结果所引入的变化。
