Microwave Kinetic Inductance Detector Made of Molecular Beam Epitaxy (MBE)-Grown MgB2 Film
We present a MgB<sub>2</sub>-based Microwave Kinetic Inductance Detector (MKID) featuring a quality factor Q<sub>i</sub> ~ 10<sup>5</sup> and noise equivalent power NEP ~ 10<sup>−14</sup> <inline-formula><math xmlns="http://www.w3.org/199...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-10-01
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| Series: | Nanomaterials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-4991/14/21/1731 |
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| Summary: | We present a MgB<sub>2</sub>-based Microwave Kinetic Inductance Detector (MKID) featuring a quality factor Q<sub>i</sub> ~ 10<sup>5</sup> and noise equivalent power NEP ~ 10<sup>−14</sup> <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi mathvariant="normal">W</mi><mo>/</mo><msqrt><mrow><mi>Hz</mi></mrow></msqrt></mrow></semantics></math></inline-formula> at 2 K. In comparison to YBCO-based MKIDs, the MgB<sub>2</sub> detector shows greater sensitivity to both temperature and magnetic field, a result of its two-gap nature and relatively low critical <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi>H</mi><mrow><mi>c</mi><mn>2</mn></mrow></msub></mrow></semantics></math></inline-formula> field. Our data indicate that MgB<sub>2</sub> is more advantageous for MKID applications at temperatures lower than 3 K. |
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| ISSN: | 2079-4991 |