Enhanced photoelectron emission in a large area aluminum nanohole array via a deep-UV surface plasmon

IF 2.8 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Express Pub Date : 2024-04-04 DOI:10.1364/ome.522182

Hirofumi Morisawa, Atsushi Ono, Koki Ikegami, Wataru Inami, and Yoshimasa Kawata

引用次数: 0

Abstract

We measured the photoelectron emission efficiency of aluminum (Al) nanohole arrays fabricated by colloidal lithography and demonstrated the enhancement of photoelectron emission in the deep-UV region via surface plasmon resonances. The Al nanohole arrays for increasing absorption in the deep-UV region were designed using the finite-difference time-domain method and used as photocathodes to enhance the photoelectron emission efficiency. The enhancement factor improved by up to 3.5 times for the optimized nanohole array. Using a two-dimensional mapping system, we demonstrated that the photoelectron emission depended on the uniformity of the sample and diameter of the nanohole arrays. Al nanohole arrays fabricated by colloidal lithography can be used to develop highly sensitive surface-detecting optical sensors and highly efficient surface-emitting electron sources. The two-dimensional mapping system can facilitate the development of highly efficient photocathodes.

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通过深紫外表面等离子体增强大面积铝纳米孔阵列的光电子发射

我们测量了通过胶体光刻法制造的铝（Al）纳米孔阵列的光电子发射效率，并证明了通过表面等离子体共振增强了深紫外区的光电子发射。利用有限差分时域法设计了可增加深紫外区吸收的铝（Al）纳米孔阵列，并将其用作光电阴极以提高光电子发射效率。优化后的纳米孔阵列的增强系数提高了 3.5 倍。利用二维绘图系统，我们证明了光电子发射取决于样品的均匀性和纳米孔阵列的直径。利用胶体光刻技术制作的铝纳米孔阵列可用于开发高灵敏度表面检测光学传感器和高效表面发射电子源。二维绘图系统可促进高效光电阴极的开发。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical Materials Express MATERIALS SCIENCE, MULTIDISCIPLINARY-OPTICS

CiteScore

5.50

自引率

3.60%

发文量

377

审稿时长

1.5 months

期刊介绍： The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optical Materials Express (OMEx), OSA''s open-access, rapid-review journal, primarily emphasizes advances in both conventional and novel optical materials, their properties, theory and modeling, synthesis and fabrication approaches for optics and photonics; how such materials contribute to novel optical behavior; and how they enable new or improved optical devices. The journal covers a full range of topics, including, but not limited to: Artificially engineered optical structures Biomaterials Optical detector materials Optical storage media Materials for integrated optics Nonlinear optical materials Laser materials Metamaterials Nanomaterials Organics and polymers Soft materials IR materials Materials for fiber optics Hybrid technologies Materials for quantum photonics Optical Materials Express considers original research articles, feature issue contributions, invited reviews, and comments on published articles. The Journal also publishes occasional short, timely opinion articles from experts and thought-leaders in the field on current or emerging topic areas that are generating significant interest.

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