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Nano-Cold-Cathode Electron Source Based on Plasmon-Mediated Emission
ACS Photonics ( IF 6.5 ) Pub Date : 2024-08-31 , DOI: 10.1021/acsphotonics.4c01181 Yan Shen 1 , Yuyue Ding 1 , Yinyao Chen 1 , Zheyu Song 1 , Tao Cui 1 , Ao Cheng 1 , Shuai Tang 1 , Zhaolong Cao 1 , Fangfei Ming 1 , Yu Zhang 1 , Huanjun Chen 1 , Ningsheng Xu 1 , Shaozhi Deng 1
ACS Photonics ( IF 6.5 ) Pub Date : 2024-08-31 , DOI: 10.1021/acsphotonics.4c01181 Yan Shen 1 , Yuyue Ding 1 , Yinyao Chen 1 , Zheyu Song 1 , Tao Cui 1 , Ao Cheng 1 , Shuai Tang 1 , Zhaolong Cao 1 , Fangfei Ming 1 , Yu Zhang 1 , Huanjun Chen 1 , Ningsheng Xu 1 , Shaozhi Deng 1
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To address the developmental requisites of the emerging generation of vacuum micro- and nanoelectronic devices, cathode electron sources are evolving toward enhanced efficiency, heightened brightness, diminished energy consumption, and enhanced tunability. The pursuit of nano-cold-cathodes with plasmon-enhanced properties emerges as a potent strategy to realize these objectives. In this study, we propose a novel large-current, high-brightness needle-like nano-cold-cathode electron source designed with photoelectric synergistic excitation. This cathode is constructed using a composite material comprising plasmonic gold (Au) nanoparticles and a high-melting-point metal tungsten (W) needle. The resulting Au-on-W needle nano-cold-cathode demonstrates outstanding electron emission characteristics: under the synergistic excitation of an electrostatic field below ∼0.35 V μm–1 and an average laser intensity of ∼10 W cm–2, the source achieved an emission current surpassing 830 nA and a reduced brightness of ∼1.1 × 1010 A m–2 sr–1 V–1. This performance marks a remarkable enhancement, improving by one and 2 orders of magnitude when compared to W needle nano-cold-cathodes and commercial Schottky point electron source cathodes, respectively, thus underscoring its significant superiorities. In this photoelectric synergistic excitation mode, the Au-on-W cathode demonstrates tunable electron emission characteristics in response to the intrinsic properties of the incident laser, including frequency, amplitude, and polarization. These features can be achieved through the direct modulation of the structural features of the Au-on-W nano-cold-cathodes. This research endeavors to establish the groundwork for the development of a new class of tunable high-performance cathode electron source devices.
中文翻译：
基于等离子体介导发射的纳米冷阴极电子源
为了满足新一代真空微电子和纳米电子器件的发展要求，阴极电子源正在朝着提高效率、提高亮度、降低能耗和增强可调性的方向发展。追求具有等离子体增强特性的纳米冷阴极成为实现这些目标的有效策略。在这项研究中，我们提出了一种采用光电协同激发设计的新型大电流、高亮度针状纳米冷阴极电子源。该阴极采用由等离子体金 (Au) 纳米颗粒和高熔点金属钨 (W) 针组成的复合材料制成。由此产生的Au-on-W针状纳米冷阴极表现出出色的电子发射特性：在~0.35 V μm –1以下的静电场和~10 W cm –2的平均激光强度的协同激发下，该源实现了发射电流超过 830 nA，亮度降低约 1.1 × 10 10 A m –2 sr –1 V –1 。这一性能显着增强，与钨针纳米冷阴极和商用肖特基点电子源阴极相比分别提高了1个和2个数量级，从而凸显了其显着的优越性。在这种光电协同激发模式下，金钨阴极表现出可调谐的电子发射特性，以响应入射激光的固有特性，包括频率、振幅和偏振。这些特征可以通过直接调制金基钨纳米冷阴极的结构特征来实现。 这项研究致力于为开发新型可调谐高性能阴极电子源器件奠定基础。
更新日期：2024-08-31
中文翻译：
基于等离子体介导发射的纳米冷阴极电子源
为了满足新一代真空微电子和纳米电子器件的发展要求，阴极电子源正在朝着提高效率、提高亮度、降低能耗和增强可调性的方向发展。追求具有等离子体增强特性的纳米冷阴极成为实现这些目标的有效策略。在这项研究中，我们提出了一种采用光电协同激发设计的新型大电流、高亮度针状纳米冷阴极电子源。该阴极采用由等离子体金 (Au) 纳米颗粒和高熔点金属钨 (W) 针组成的复合材料制成。由此产生的Au-on-W针状纳米冷阴极表现出出色的电子发射特性：在~0.35 V μm –1以下的静电场和~10 W cm –2的平均激光强度的协同激发下，该源实现了发射电流超过 830 nA，亮度降低约 1.1 × 10 10 A m –2 sr –1 V –1 。这一性能显着增强，与钨针纳米冷阴极和商用肖特基点电子源阴极相比分别提高了1个和2个数量级，从而凸显了其显着的优越性。在这种光电协同激发模式下，金钨阴极表现出可调谐的电子发射特性，以响应入射激光的固有特性，包括频率、振幅和偏振。这些特征可以通过直接调制金基钨纳米冷阴极的结构特征来实现。 这项研究致力于为开发新型可调谐高性能阴极电子源器件奠定基础。
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