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Theoretical study of terahertz quantum well photodetectors: Effect of metallic diffraction coating

机译:太赫兹量子阱光电探测器的理论研究:金属衍射涂层的影响

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摘要

The possibility of enhancement of sensitivity of quantum well photodetectors by adding metallic diffraction coating on top of the dielectric layer of photodetectors is Studied. With the grating the spatial distribution of the intensity of electromagnetic wave within the active region of the photodetector is highly non-uniform with the intensity variation over a few orders of magnitude within a period of the grating. This effect is due to the Coupling of Surface plasmon with incident electromagnetic wave. At terahertz frequencies the average intensity of the transmitted radiation wave through the grating strongly depends oil the dielectric constant of metal. (C) 2008 Elsevier B.V. All rights reserved.
机译:研究了通过在光电探测器的介电层顶部添加金属衍射涂层来增强量子阱光电探测器灵敏度的可能性。对于光栅,光检测器的有效区域内电磁波强度的空间分布是高度不均匀的,其强度在光栅的周期内在几个数量级上变化。这种影响是由于表面等离子体激元与入射电磁波的耦合。在太赫兹频率下,通过光栅的透射辐射波的平均强度在很大程度上取决于油的金属介电常数。 (C)2008 Elsevier B.V.保留所有权利。

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