We present the enhancement of the hot-electron emissions by the enhanced electric field with deep UV surface plasmon resonance (DUV-SPR). An aluminum disk–hole array was designed using the finite-difference time-domain (FDTD) method for enhancing the electric field by the disk–hole cavity coupling. We found that the photoelectron emission efficiencies were experimentally improved by four times and that the disk–hole distance was a key factor to induce the strong disk–hole coupling. The aluminum disk–hole array with DUV-SPR would be expected for many applications, such as the highly sensitive photodetectors, the photoelectron guns, and the efficient photocatalysts.

中文翻译：

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铝周期圆盘孔阵列上深紫外表面等离子体共振的热电子发射增强

我们展示了通过具有深紫外表面等离子体共振 (DUV-SPR) 的增强电场来增强热电子发射。使用有限差分时域 (FDTD) 方法设计了铝盘孔阵列，以通过盘孔腔耦合增强电场。我们发现光电子发射效率通过实验提高了四倍，并且盘孔距离是诱发强盘孔耦合的关键因素。具有 DUV-SPR 的铝盘孔阵列有望用于许多应用，例如高灵敏度光电探测器、光电子枪和高效光催化剂。