High-absorption optical stack for aluminum kinetic inductance detectors
We present a high-absorption optical stack design for aluminum (Al) kinetic inductance detectors (KIDs). Aluminum can be easily processed in micro-fabrication and is the most conventional superconducting material for KIDs.However, it is challenging to achieve high absorption in the Al absorber because of its high reflection at optical wavelengths. By embedding the thin Al film between an anti-reflection (AR) coating layer and a dielectric-based distributed Bragg reflector, we show that close-to-unity absorption can be achieved around a single wavelength (e.g.,≈98.9% at 1518 nm). The reflection and transmission measurements agreewell with the calculation based on the transmission matrix model.We also show our preliminary results of absorption ≥70% in a broader wavelength range (≈230 nm) with multilayer AR coatings. The absorber design in a lumped-element KID is discussed. Our work paves the way to high-efficiency photon-counting and energy-resolving Al-based KIDs in the optical to NIR range.
|WOS Accession No|
|ESI Research Field|
Cited Times [WOS]:0
|Document Type||Journal Article|
|Department||Institute for Quantum Science and Engineering|
1.Quantum Optoelectronics Laboratory,School of Physics Science and Technology,Southwest Jiaotong University,Chengdu,610031,China
2.Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.International Quantum Academy,Shenzhen,518048,China
|Corresponding Author Affilication||Institute for Quantum Science and Engineering|
Mai，Zhanzhang,Dai，Xucheng,Chen，Yingni,et al. High-absorption optical stack for aluminum kinetic inductance detectors[J]. Applied Optics,2023,62(19):5294-5300.
Mai，Zhanzhang.,Dai，Xucheng.,Chen，Yingni.,Shi，Zhongyu.,Wang，Haoyu.,...&Wang，Yiwen.(2023).High-absorption optical stack for aluminum kinetic inductance detectors.Applied Optics,62(19),5294-5300.
Mai，Zhanzhang,et al."High-absorption optical stack for aluminum kinetic inductance detectors".Applied Optics 62.19(2023):5294-5300.
|Files in This Item:||There are no files associated with this item.|
|Recommend this item|
|Export to Endnote|
|Export to Excel|
|Export to Csv|
|Similar articles in Google Scholar|
|Similar articles in Baidu Scholar|
|Similar articles in Bing Scholar|
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.