自旋电子太赫兹发射器的空间和时间热管理

IF 2.3 4区物理与天体物理 Q3 PHYSICS, APPLIED

Applied Physics Express Pub Date : 2024-08-12 DOI:10.35848/1882-0786/ad6955

Gabriel Gandubert, Joel Edouard Nkeck, Xavier Ropagnol, Denis Morris, François Blanchard

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引用次数: 0

摘要

这项研究提出了解决振荡器激光器泵浦光束引起的不良热效应的方法，以提高太赫兹（THz）自旋电子发射器的效率。我们探索了两种方法：利用二维透镜阵列对泵浦能量进行空间分布，以及对泵浦占空比进行时间调制。通过增加局部散热、延迟饱和极限，优化空间分布可将太赫兹信号提高约一倍。同样，通过调整占空比对泵脉冲进行时间扩展，可以在异质结构内实现更大程度的热弛豫，从而提高太赫兹波产生的整体效率。

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Spatial and temporal thermal management of a spintronic terahertz emitter

This work presents methods for addressing undesirable thermal effects induced by the pump beam of an oscillator laser to improve the efficiency of a terahertz (THz) spintronic emitter. We explore two approaches: spatial distribution of pump energy using a 2D lens array and temporal modulation of the pump duty cycle. Optimizing the spatial distribution approximately doubles the THz signal by increasing local heat dissipation, delaying the saturation limit. Similarly, temporal spreading of pump pulses by adjusting the duty cycle allows greater thermal relaxation within the heterostructure, enhancing the overall efficiency of THz wave generation.

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来源期刊

Applied Physics Express 物理-物理：应用

CiteScore

4.80

自引率

8.70%

发文量

310

审稿时长

1.2 months

期刊介绍： Applied Physics Express (APEX) is a letters journal devoted solely to rapid dissemination of up-to-date and concise reports on new findings in applied physics. The motto of APEX is high scientific quality and prompt publication. APEX is a sister journal of the Japanese Journal of Applied Physics (JJAP) and is published by IOP Publishing Ltd on behalf of the Japan Society of Applied Physics (JSAP).