Design and performance of hafnium optical and near-IR kinetic inductance detectors

被引：20

作者：

Zobrist, Nicholas ^{[1
]}

Coiffard, Gregoire ^{[1
]}

Bumble, Bruce ^{[2
]}

Swimmer, Noah ^{[1
]}

Steiger, Sarah ^{[1
]}

Daal, Miguel ^{[1
]}

Collura, Giulia ^{[1
]}

Walter, Alex B. ^{[1
]}

Bockstiegel, Clint ^{[1
]}

Fruitwala, Neelay ^{[1
]}

Lipartito, Isabel ^{[1
]}

Mazin, Benjamin A. ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[2] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91125 USA

来源：

APPLIED PHYSICS LETTERS | 2019年 / 115卷 / 21期

基金：

美国国家航空航天局;

关键词：

SUPERCONDUCTING TUNNEL-JUNCTIONS; SPECTROMETERS; FILMS;

D O I：

10.1063/1.5127768

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on the design and performance of microwave kinetic inductance detectors (MKIDs) sensitive to single photons in the optical to near-infrared range using hafnium as the sensor material. Our test device had a superconducting transition temperature of 395 mK and a room temperature normal state resistivity of 97 mu Omega cm with RRR = 1.6. Resonators on the device displayed internal quality factors of around 200 000. Similar to the analysis of MKIDs made from other highly resistive superconductors, we find that modeling the temperature response of the detector requires an extra broadening parameter in the superconducting density of states. Finally, we show that this material and design is compatible with a full-array fabrication process, which resulted in pixels with decay times of about 40 mu s and resolving powers of similar to 9 at 800 nm.

引用

页数：5

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