3 ms·
> Specifically, using a suspended asymmetric Fabry–Pérot resonator and a wavelength-stabilized probe laser we demonstrate a thermoreflectance coefficient of >30
by AdamH12113 4y ago
> Specifically, using a suspended asymmetric Fabry–Pérot resonator and a wavelength-stabilized probe laser we demonstrate a thermoreflectance coefficient of >30/K, enabling measurements with a thermometry noise floor of ~60 [nK/root Hz] and a temperature resolution of <100 nK in a bandwidth of 0.1 Hz.
Is a bandwidth of 0.1 Hz good in this context? Does it imply that the temperatures they're measuring are very stable on a time scale of a second or so? Or are higher-frequency variations ignored?
- ISL 4y agoIt is a reasonable bet that the thermalization time of their sensor is in the neighborhood of 100ms or so (which is very fast). The thing that is really good/interesting is the 60 nK/rtHz sensitivity at those frequencies. Off the top of my head, I believe that the best thermistor-based systems I've built have been in the 10-100 uK/rtHz realm. It is interesting to ponder whether such extreme sensitivity for a small object might open up some new avenues in fundamental physics. Things related to temperature are generally hard, but every time a new technique emerges, it is worth looking around to see if any new doors have opened.