Development of super resolution optical imaging device coupling between photons and electrons

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K22101
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 28:Nano/micro science and related fields
• Research Institution: Shizuoka University
• Principal Investigator: ONO ATSUSHI 静岡大学, 電子工学研究所, 准教授 (20435639)
• Project Period (FY): 2019-06-28 – 2021-03-31
• Keywords: 表面プラズモン / 超解像イメージング / 近接場光学 / 金属ナノワイヤ

Outline of Final Research Achievements

The purpose of this research is the development of the super resolution imaging based on a new principle using electron vibrations in metals. For hits purpose, we established a synthesis method for crystalline silver nanowires and demonstrated resonant light propagation on silver nanowires. To analyze this resonant propagation properties, we investigated the propagation simulation by FDTD method, spectral analysis of the propagated light, and polarization dependences. Furthermore, we established a manipulation technique to locally drop quantum dots at the one end of a silver nanowire, and it is demonstrated that the fluorescence from quantum dots propagates through the silver nanowire by electron oscillation.

Free Research Field

近接場光学

Academic Significance and Societal Importance of the Research Achievements

本研究成果は，従来の回折限界以下の微小スポットからの光情報の取得という光学顕微鏡の超解像化に対する既成概念から脱却し，通常のレンズを用いた光学観察と同様に，2次元画像を一括に取得するなかで超解像が得られるという可能性を示唆した極めて重要な成果といえる．