Kokkoniemi Roope, Govenius Joonas, Vesterinen Visa, Lake Russell E, Gunyhó András M, Tan Kuan Y, Simbierowicz Slawomir, Grönberg Leif, Lehtinen Janne, Prunnila Mika, Hassel Juha, Lamminen Antti, Saira Olli-Pentti, Möttönen Mikko
QCD Labs, QTF Centre of Excellence, Department of Applied Physics, Aalto University, P.O. Box 13500, 00076 Aalto, Finland.
VTT Technical Research Centre of Finland Ltd, QTF Centre of Excellence, P.O. Box 1000, 02044 VTT, Finland.
Commun Phys. 2019;2(1). doi: 10.1038/s42005-019-0225-6.
Since the introduction of bolometers more than a century ago, they have been used in various applications ranging from chemical sensors, consumer electronics, and security to particle physics and astronomy. However, faster bolometers with lower noise are of great interest from the fundamental point of view and to find new use-cases for this versatile concept. We demonstrate a nanobolometer that exhibits roughly an order of magnitude lower noise equivalent power, , than previously reported for any bolometer. Importantly, it is more than an order of magnitude faster than other low-noise bolometers, with a time constant of 30 s at . These results suggest a calorimetric energy resolution of with a time constant of 30 s. Further development of this nanobolometer may render it a promising candidate for future applications requiring extremely low noise and high speed such as those in quantum technology and terahertz photon counting.
自一个多世纪前测辐射热计问世以来，它们已被用于从化学传感器、消费电子产品、安全领域到粒子物理学和天文学等各种应用中。然而，从基本原理的角度以及为这个通用概念寻找新的应用案例来看，具有更低噪声的更快测辐射热计备受关注。我们展示了一种纳米测辐射热计，其噪声等效功率比此前报道的任何测辐射热计都低大约一个数量级。重要的是，它比其他低噪声测辐射热计快一个多数量级，在[具体温度]下时间常数为30秒。这些结果表明，在时间常数为30秒的情况下，量热能量分辨率为[具体数值]。这种纳米测辐射热计的进一步发展可能使其成为未来需要极低噪声和高速的应用（如量子技术和太赫兹光子计数中的应用）的有前途的候选者。
