Noise and sensitivity of aluminum kinetic inductance detectors for sub-mm astronomy

被引：67

作者：

Baselmans, J. ^{[1
]}

Yates, S. J. C. ^{[1
]}

Barends, R. ^{[2
]}

Lankwarden, Y. J. Y. ^{[1
]}

Gao, J. R. ^{[2
]}

Hoevers, H. ^{[1
]}

Klapwijk, T. M. ^{[2
]}

机构：

[1] SRON, Inst Space Res, NL-3584 CA Utrecht, Netherlands

[2] Delft Univ Technol, Kavli Inst Nanosci, NL-2628 CJ Delft, Netherlands

来源：

JOURNAL OF LOW TEMPERATURE PHYSICS | 2008年 / 151卷 / 1-2期

关键词：

sub-mm detectors; kinetic inductance;

D O I：

10.1007/s10909-007-9684-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Kinetic inductance detectors are based upon high Q superconducting resonators. We have measured the electrical Noise Equivalent Power (NEP) of 100 nm thick 1/4 lambda coplanar waveguide Aluminum resonators at 100 mK using phase readout and radius readout. We find that the phase NEP is independent of the Q factor of the resonator, limited by excess noise in the KID and given by NEP = 9 x 10(-18) W/root Hz at 100 Hz. It increases with roughly f(-0.5) at lower frequencies. The amplitude NEP is strongly Q factor dependent, limited by the setup noise, nearly frequency independent and as low as NEP = 3 x 10(-18) W/root Hz for a high Q resonator (Q = 454.000). For lower Q resonators the amplitude NEP increases to values equal to or even larger than the phase readout.

引用

页码：524 / 529

页数：6

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