We studied the absorption of microwave electromagnetic radiation incident normal to a two-dimensional electron system on a dielectric substrate with a metallic back reflector. We have shown that the presence of a back gate strongly modifies the spectrum of plasmon polaritons in such a structure. We observe a transverse plasmon mode which starts from zero frequency at zero magnetic field and follows renormalized cyclotron resonance. This renormalization occurs from the hybridization of plasma modes with Fabry-Pérot photonic resonances in the substrate, which indicates their transverse nature. Finally, we speculate that the observed modes resemble helicon waves in three-dimensional metals.

中文翻译：

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在屏蔽的二维电子系统中吸收电磁波


我们研究了垂直于二维电子系统入射的微波电磁辐射在带有金属背反射器的介电衬底上的吸收。我们已经证明，背栅的存在强烈改变了这种结构中等离激元极化激元的光谱。我们观察到一种横向等离激元模式，该模式从零磁场的零频率开始，并遵循重整化回旋共振。这种重整化是由于等离子体模式与衬底中的法布里-珀罗光子共振的杂化而发生的，这表明它们的横向性质。最后，我们推测观察到的模式类似于三维金属中的螺旋波。