High-Efficiency Raman Scattering Measurement of Lattice-Magneto Interaction of Monolayer Graphene within a High-Power Magnet Field and Low Temperature

2015 Fiscal Year Final Research Report

• Project/Area Number: 25610078
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics I
• Research Institution: National Institute for Materials Science
• Principal Investigator: Mitsui Tadashi 国立研究開発法人物質・材料研究機構, 表界面構造・物性ユニット, 主任研究員 (90343863)
• Co-Investigator(Kenkyū-buntansha): TAKAMASU Tadashi 国立研究開発法人物質・材料研究機構, 表界面構造・物性ユニット, グループリーダー (60212015)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: グラフェン / ラマン散乱 / 強磁場 / 極低温

Outline of Final Research Achievements

We developed a high-efficiency optical measurement device for operation within the small bore of a high-power magnet at low temperature. For the high-efficiency measurement of light emitted from this small region, we designed and fabricated a compact confocal optics with lens focusing and tilting systems, and used a piezodriven translation stage that allows micron-scale focus control of the sample position. We designed a measurement device that uses 10 m-long optical fibers in order to avoid the influence of mechanical vibration and magnetic field leakage of high-power magnets, and we also developed a technique for minimizing the fluorescence signal of optical fibers. By using this device, we observed Raman scattering spectra of monolayer graphene on quartz glass with a high signal-to-noise ratio.

Free Research Field

近接場光学