A photonics switch by a single nanoparticle

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560059
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Applied optics/Quantum optical engineering
• Research Institution: National Institute for Materials Science
• Principal Investigator: TAKEDA Yoshihiko 独立行政法人物質・材料研究機構, 量子ビームユニット, グループリーダー (90354357)
• Research Collaborator: SATO Rodrigo
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 金属ナノ粒子 / 非線形光学 / 3次光学感受率 / フェムト秒ポンププローブ分光 / 分光エリプソメトリー / プラズモニクス / フォトニックスイッチ / 光双安定性

Outline of Final Research Achievements

We have investigated on third-order optical nonlinearity of Ag nanoparticles. Ag nanoparticles were fabricated in silica glass by negative ion implantation. The third-order optical susceptibility of Ag nanoparticles with various sizes was evaluated with spectroscopic ellipsometry and femto-second-pulse pump-probe spectroscopy. The third-order optical susceptibility is sensitive for the particle size and exponentially increases with the decrease in the size smaller than 15 nm due to dominance of a quantum size effect. The dispersion and the amplitude reflect the change on transition energy between quantum discrete levels. We have experimentally demonstrated a modulation of the local electric field in a Ag nanoparticles with the third-order optical nonlinearity. The dispersion of the local field factor is also shifted with applied light intensity.

Free Research Field

光物性、ナノ材料、超高速分光、イオンビーム