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Nanokelvin-resolution thermometry with a photonic microscale sensor at room temperature
Nature Photonics ( IF 32.3 ) Pub Date : 2022-06-02 , DOI: 10.1038/s41566-022-01011-0
Amin Reihani , Edgar Meyhofer , Pramod Reddy

Ultrahigh-resolution thermometry is critical for future advances in bio-calorimetry1,2, sensitive bolometry for sensing3 and imaging4, as well as for probing dissipation in a range of electronic5, optoelectronic6 and quantum devices7. In spite of recent advances in the field8,9,10,11, achieving high-resolution measurements from microscale devices at room temperature remains an outstanding challenge. Here, we present a band-edge microthermometer that achieves this goal by relying on the strong, temperature-dependent optical properties of GaAs at its absorption edge12,13,14. Specifically, using a suspended asymmetric Fabry–Pérot resonator and a wavelength-stabilized probe laser we demonstrate a thermoreflectance coefficient of >30 K−1, enabling measurements with a thermometry noise floor of ~60 nK Hz−1/2 and a temperature resolution of <100 nK in a bandwidth of 0.1 Hz. The advances presented here are expected to enable a broad range of studies and applications in calorimetry and bolometry where miniaturized high-resolution thermometers are required.



中文翻译:

在室温下使用光子微尺度传感器进行 Nanokelvin 分辨率测温

超高分辨率测温对于生物量热法1,2、用于传感3和成像4的敏感辐射热测量法以及探测电子5、光电6和量子器件7范围内的耗散的未来进展至关重要。尽管该领域8、9、10、11取得了最新进展,但在室温下从微型设备实现高分辨率测量仍然是一项突出的挑战。在这里,我们展示了一种带边测温仪,它依靠 GaAs 在其吸收边缘12、13、14的强、与温度相关的光学特性来实现这一目标. 具体来说,使用悬浮的非对称法布里-珀罗谐振器和波长稳定的探针激光器,我们展示了 >30 K -1的热反射系数,能够以~60 nK Hz -1/2的温度测量噪声基底和温度分辨率进行测量<100 nK,带宽为 0.1 Hz。这里介绍的进展有望在需要微型高分辨率温度计的量热法和辐射热测量法中进行广泛的研究和应用。

更新日期:2022-06-02
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