通过横向热电效应产生太赫兹辐射
Petar Yordanov1, Tim Priessnitz1,2, Min-Jae Kim1,2,3
1Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569, Stuttgart, Germany.
Advanced materials (Deerfield Beach, Fla.)
|August 11, 2023
概括
研究人员利用层层的过渡金属氧化物中的横向热电效应产生了强烈的太赫兹 (THz) 辐射. 这种简单的方法使微型设备能够有效地发射THz,从而推进了THz技术.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学是一种材料科学.
- 光电学是指光电子产品.
背景情况:
- 太赫兹 (THz) 辐射对于成像,传感和通信等应用至关重要.
- 开发高效和简单的THz发射器是推进THz技术和微型设备的关键.
研究的目的:
- 展示一种新的方法,利用层层的导电过渡金属氧化物中的横向热电效应产生强烈的THz辐射.
- 探索材料中电子异性质的潜力,以实现高效的THz发射.
主要方法:
- 利用 femtosecond 激光脉冲,在在切割的基板上生长的分层导电过渡金属氧化物薄膜中创建超快的外平面温度梯度.
- 研究横向热电效应以产生平面内热电流.
- 在PdCoO2和La1.84Sr0.16CuO4薄膜上进行实验.
- 执行模型计算,以了解材料参数对THz排放的影响.
主要成果:
- 从PdCoO2和La1.84Sr0.16CuO4.4薄膜中有效地产生强烈的THz辐射.
- 建立了电子异构性,激光诱导的温度梯度和THz发射之间的直接联系.
- 模型计算阐明了材料特性对THz场特征的影响.
结论:
- 层层的过渡金属氧化物中的横向热电效应为THz辐射生成提供了一个简单有效的途径.
- 这种方法促进了用于先进设备的多功能THz源和可集成的发射元件的开发.
- 这些发现为THz技术的新型应用铺平了道路.
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