Losses in coplanar waveguide resonators at millikelvin temperatures

被引：81

作者：

Macha, P. ^{[1
]}

van der Ploeg, S. H. W. ^{[1
]}

Oelsner, G. ^{[1
]}

Il'ichev, E. ^{[1
]}

Meyer, H. -G. ^{[1
]}

Wuensch, S. ^{[2
]}

Siegel, M. ^{[2
]}

机构：

[1] Inst Photon Technol, D-07702 Jena, Germany

[2] Karlsruher Inst Technol, Inst Mikro & Nanoelektron Syst, D-76187 Karlsruhe, Germany

来源：

APPLIED PHYSICS LETTERS | 2010年 / 96卷 / 06期

关键词：

dielectric materials; optical losses; optical planar waveguides; optical resonators;

D O I：

10.1063/1.3309754

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We study the loss rate for a set of lambda/2 coplanar waveguide resonators at millikelvin temperatures (20-900 mK) and different applied powers (3 center dot 10(-19)-10(-12) W). The loss rate becomes power independent below a critical power. For a fixed power, the loss rate increases significantly with decreasing temperature. We show that this behavior can be caused by two-level systems in the surrounding dielectric materials. Interestingly, the influence of the two-level systems is of the same order of magnitude for the different material combinations. That leads to the assumption that the nature of these two-level systems is material independent.

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页数：3

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