arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1908.10472cond-mat.mtrl-sciphysics.ins-det
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利用自旋Seebeck效应的宽带光探测

Broadband Optical Detection using the Spin Seebeck Effect

Subash Kattel, Joseph R. Murphy, David Ellsworth, Jinjun Ding, Tao Liu, Peng Li, Mingzhong Wu, William D. Rice

摘要:

固态器件中自旋电流的产生、控制和检测对于焦耳热最小化、基于自旋的计算和从热梯度产生电能至关重要。虽然将自旋功能纳入技术上重要的架构仍处于起步阶段,但与全电子设备相比的优势越来越明显。在这里,我们利用自旋塞贝克效应(SSE)在Pt/Y3 Fe 5 O 12器件检测从390到2200 nm的光。我们发现,在这个技术上重要的波长范围内,器件的响应度是非常平坦的,紧随铂的吸收系数。正如预期的SSE生成机制,我们观察到的光电压和Pt加热动力学是在强烈的协议。为了精确地确定从点状热源产生的光学创建的热梯度,我们引入了一种测量SSE的场调制方法。我们的研究结果表明,宽带光学检测可以进行基于自旋电流产生和检测的设备。

英文摘要:

The generation, control, and detection of spin currents in solid-state devices are critical for Joule-heating minimization, spin-based computation, and electrical energy generation from thermal gradients. Although incorporation of spin functionality into technologically important architectures is still in its infancy, advantages over all-electric devices are increasingly becoming clear. Here, we utilize the spin Seebeck effect (SSE) in Pt/Y3Fe5O12 devices to detect light from 390 to 2200 nm. We find the device responsivity is remarkably flat across this technologically important wavelength range, closely following the Pt absorption coefficient. As expected from a SSE-generation mechanism, we observe that the photovoltage and Pt heating dynamics are in strong agreement. To precisely determine the optically created thermal gradient produced from a point-like heat source, we introduce a field-modulation method for measuring the SSE. Our results show broadband optical detection can be performed with devices based solely on spin current generation and detection.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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