Study of terahertz-wave kinetic inductance detectors with superconducting metamaterials

2023 Fiscal Year Final Research Report

• Project/Area Number: 22K18991
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 30:Applied physics and engineering and related fields
• Research Institution: Institute of Physical and Chemical Research
• Principal Investigator: Otani Chiko 国立研究開発法人理化学研究所, 光量子工学研究センター, チームリーダー (50281663)
• Project Period (FY): 2022-06-30 – 2024-03-31
• Keywords: メタマテリアル / フォノン / マイクロ波

Outline of Final Research Achievements

Microwave kinetic inductance detectors (MKIDs) are superconducting ones that can read out signals from more than 100 pixels with a single readout line. However, MKIDs have different resonator designs and characteristics for each pixel in order to show the resonant frequency. We have the idea to add metamaterials to the same resonator design so as to show the similar characteristics with the different resonant frequency. Moreover, superconducting metamaterial has great potential in terms of adding functionality to the eminent properties of superconductivity. Then, in this project, 'superconducting metamaterials' including metamaterial-embedded resonators were investigated. First, we performed the simulations of an anapole-type metamaterial and found good conditions for plasmon-induced transmission. Moreover, we observed resonance modes of microwave-excited LA phonons on both surfaces in MKIDs fabricated on a LN substrate, and found the new scheme in combination with anapole.

Free Research Field

超伝導検出器

Academic Significance and Societal Importance of the Research Achievements

超伝導メタマテリアルはまだ始まったばかりであり、超伝導の先鋭な特性に豊富な機能性を付与できるという意味で、大きな可能性を有している。また、マイクロ波からテラヘルツ帯のフォノンは、テラヘルツ帯の測定技術が限定されてきたことからまだ未開拓であり、その直接観測が可能な超伝導体による観測により新たな知見が期待できる。