Hybrid <b> <i>α</i> </b>-Ta/<b> <i>β</i> </b>-Ta lumped element kinetic inductance detectors with photon noise limited sensitivity and stability

The terahertz (THz) band is of immense interest in astronomy as it encompasses significant energy generated following the Big Bang, offering critical insight into processes invisible in other bands, such as the earliest stages of planet, star, and galaxy formation. Kinetic inductance detectors (KIDs) have emerged as a formidable contender in the field of THz astronomy, attributed to their exceptional sensitivity and scalability. In this study, we introduce a kind of KIDs incorporating a lumped element (LE) resonator design, with inductors fabricated on β-Ta film and capacitors on α-Ta film. We characterize the noise of the hybrid α-Ta/β-Ta LEKIDs, achieving an optical noise equivalent power of 8.3 ± 5.7 × 10−19 W/Hz1/2, demonstrating high sensitivity. Additionally, the LEKIDs exhibited stability across multiple thermal cycles. The combination of high sensitivity and stability makes the hybrid LEKIDs promising for the stringent demands of THz astronomy.

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Publication Details

Journal
Applied Physics Letters
Published
2024-11-11
DOI
https://doi.org/10.1063/5.0230767
Citations
1
Primary Topic
Superconducting and THz Device Technology
Type
article
Field-Weighted Citation Impact
0.33

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Hybrid α -Ta/ β -Ta lumped element kinetic inductance detectors with photon noise limited sensitivity and stability

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Applied Physics Letters
Superconducting and THz Device Technology
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article

Hybrid α -Ta/ β -Ta lumped element kinetic inductance detectors with photon noise limited sensitivity and stability

Jian Chen, Juncheng Cao, Tianyuan Chi, Jingbo Wu, Xuecou Tu, Y. Zhu, Runfeng Su, Peiheng Wu, Biaobing Jin, Shiyi Yao, Siming Zang, Junhua Chen, Hongqiang Wang, Ruishan Tan, Lili Shi
article en
1 citations

Abstract

The terahertz (THz) band is of immense interest in astronomy as it encompasses significant energy generated following the Big Bang, offering critical insight into processes invisible in other bands, such as the earliest stages of planet, star, and galaxy formation. Kinetic inductance detectors (KIDs) have emerged as a formidable contender in the field of THz astronomy, attributed to their exceptional sensitivity and scalability. In this study, we introduce a kind of KIDs incorporating a lumped element (LE) resonator design, with inductors fabricated on β-Ta film and capacitors on α-Ta film. We characterize the noise of the hybrid α-Ta/β-Ta LEKIDs, achieving an optical noise equivalent power of 8.3 ± 5.7 × 10−19 W/Hz1/2, demonstrating high sensitivity. Additionally, the LEKIDs exhibited stability across multiple thermal cycles. The combination of high sensitivity and stability makes the hybrid LEKIDs promising for the stringent demands of THz astronomy.

Applied Physics LettersVol. 125(20)
National University of Defense Technology (CN), Shanghai Institute of Microsystem and Information Technology (CN), Purple Mountain Laboratories (CN), Nanjing University (CN)
National Natural Science Foundation of China, Jiangsu Provincial Key Laboratory of Advanced Manipulating Technique of Electromagnetic Wave, National Key Research and Development Program of China, Fundamental Research Funds for the Central Universities
Affordable and clean energy
Openalex Percentile: Top 33%
Superconducting and THz Device Technology
0.33
DOISourceOpenAlex
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