利用平面天线提高太赫兹自旋电子发射率

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

APL Materials Pub Date : 2024-05-10 DOI:10.1063/5.0200413

Matthias Pacé, Oleksandr Kovalenko, José Solano, Michel Hehn, Matthieu Bailleul, Mircea Vomir

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引用次数: 0

摘要

自旋电子太赫兹发射器由钽/钴/铂三层膜组成，图案为 10 μm 范围内横向大小的矩形，已被集成到各种类型的平面电磁天线（偶极子、领结和螺旋）中。在电磁模拟的帮助下，对天线的尺寸和形状进行了优化，以便在 1 太赫兹左右的窄带和宽带几何条件下最大限度地提高天线效率。利用泵浦探针自由空间电光采样装置对单发射器几何形状和发射器阵列的太赫兹发射进行了研究。结果表明，所有天线几何结构检测到的太赫兹信号都有所增加，根据天线类型和频率范围的不同，增强比在 3 到 15 之间，同时发射带宽的变化也与模拟特性一致。

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Increasing terahertz spintronic emission with planar antennas

Spintronic THz emitters, consisting of Ta/Co/Pt trilayers patterned into lateral-sized rectangles in the 10 μm range, have been integrated in planar electromagnetic antennas of various types (dipole, bow-tie, and spiral). The antenna dimensions and shapes have been optimized with the help of electromagnetic simulations so as to maximize antenna efficiency in both narrow-band and broadband geometries at/around 1 THz. The THz emission has been studied using a pump–probe free space electro-optic sampling setup, both for single-emitter geometry and for arrays of emitters. The results show an increase in the detected THz signal for all antenna geometries, with enhancement ratios in the range of three to fifteen, depending on the antenna type and frequency range, together with changes in the emission bandwidth consistent with simulated characteristics.

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来源期刊

APL Materials NANOSCIENCE & NANOTECHNOLOGYMATERIALS SCIE-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

9.60

自引率

3.30%

发文量

199

审稿时长

2 months

期刊介绍： APL Materials features original, experimental research on significant topical issues within the field of materials science. In order to highlight research at the forefront of materials science, emphasis is given to the quality and timeliness of the work. The journal considers theory or calculation when the work is particularly timely and relevant to applications. In addition to regular articles, the journal also publishes Special Topics, which report on cutting-edge areas in materials science, such as Perovskite Solar Cells, 2D Materials, and Beyond Lithium Ion Batteries.