Numerical simulation based on the TDGL equations for high-efficient superconducting-strip detectors

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420350
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Electron device/Electronic equipment
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Mawatari Yasunori 国立研究開発法人産業技術総合研究所, 電子光技術研究部門, 上級主任研究員 (70358068)
• Co-Investigator(Renkei-kenkyūsha): ZEN Nobuyuki 産業技術総合研究所, ナノエレクトロニクス研究部門, 主任研究員 (20455439) ; KASHIWAYA Satoshi 産業技術総合研究所, 電子光技術研究部門, 首席研究員 (40356770)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 超伝導ストリップ検出器 / 単一光子 / 分子イオン / 時間依存 Ginzburg-Landau方程式 / 数値シミュレーション

Outline of Final Research Achievements

We have theoretically investigated single-photon and biomolecular-ion detectors using superconducting nanostrips on the basis of the numerical simulation solving the time-dependent Ginzburg-Landau (TDGL) equations. We numerically verified that the hot-spot model without nucleation of vortices is adequate for ion detectors, whereas the vortex motion plays crucial roles for local normal transition of superconducting strips for single-photon detectors. Biomolecular-ion detectors using MgB2 superconducting nanostrips are thermally stable and have high detection efficiency. Furthermore, we have theoretically proposed a new single-photon detectors in which photon assisted vortices in superconducting nanostrips are detected by single-flux-quantum (SFQ) circuits.

Free Research Field

工学