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首页> 外文期刊>Review of Scientific Instruments >Sub-picowatt/kelvin resistive thermometry for probing nanoscale thermal transport
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Sub-picowatt/kelvin resistive thermometry for probing nanoscale thermal transport

机译：亚皮瓦/开尔文电阻测温仪，用于探测纳米级热传输

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摘要

Advanced instrumentation in thermometry holds the key for experimentally probing fundamental heat transfer physics. However, instrumentation with simultaneously high thermometry resolution and low parasitic heat conduction is still not available today. Here we report a resistive thermometry scheme with ∼50 μK temperature resolution and ∼0.25 pW/K thermal conductance resolution, which is achieved through schemes using both modulated heating and common mode noise rejection. The suspended devices used herein have been specifically designed to possess short thermal time constants and minimal attenuation effects associated with the modulated heating current. Furthermore, we have systematically characterized the parasitic background heat conductance, which is shown to be significantly reduced using the new device design and can be effectively eliminated using a “canceling” scheme. Our results pave the way for probing fundamental nanoscale thermal transport processes using a general scheme based on resistive thermometry.
机译：先进的测温仪器是实验研究基本传热物理学的关键。但是，同时具有高测温分辨率和低寄生热传导的仪器今天仍然不可用。在这里，我们报告了一种电阻测温方案，该方案具有〜50μK的温度分辨率和〜0.25 pW / K的热导分辨率，可通过使用调制加热和共模噪声抑制的方案来实现。本文所用的悬挂装置经过专门设计，具有较短的热时间常数和与调制加热电流相关的最小衰减效应。此外，我们已经系统地表征了寄生本底导热，使用新的器件设计已显示该寄生导热显着降低，并且可以使用“取消”方案有效消除。我们的结果为使用基于电阻测温的通用方案探索基本的纳米级热传输过程铺平了道路。

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