Phononic Thermal Conduction Engineering for Bolometers: From Phononic Crystals to Radial Casimir Limit
Phononic Thermal Conduction Engineering for Bolometers: From Phononic Crystals to Radial Casimir Limit
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DOI：
10.1007/s10909-015-1372-0
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发表时间：
2016-07-01
影响因子：
2
通讯作者：
Geng, Z.
中科院分区：
文献类型：
--
作者：
Maasilta, I. J.;Puurtinen, T. A.;Geng, Z.
我们讨论了两种替代和互补的方法控制径向声子传导测辐射热计在两个维度：通过使用声子晶体或通过粗糙化的膜（卡西米尔限制）的表面。对于声子晶体，我们提出了新的实验与修改后的几何形状和更大的孔周期比以前，实现了低的热导pW/K在150 mK。另一方面，在卡西米尔极限中的计算表明，对于小探测器尺寸，热导率低于1 fW/K似乎是可以实现的。
We discuss two alternative and complementary means of controlling radial phonon conduction for bolometers in two dimensions: by using phononic crystals or by roughening the surface of the membranes (Casimir limit). For phononic crystals, we present new experiments with a modified geometry and a larger hole periodicity than before, achieving a low thermal conductance pW/K at 150 mK. Calculations in the Casimir limit, on the other hand, show that for small detector dimensions thermal conductance below 1 fW/K seems achievable.