Investigation of microscopic susceptibility in visible region using X-ray nonlinear optics

• Project/Area Number: 25610081
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics I
• Research Institution: The Institute of Physical and Chemical Research
• Principal Investigator: TAMASAKU Kenji 独立行政法人理化学研究所, 放射光科学総合研究センター, チームリーダー (30300883)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2013: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
• Keywords: X線 / 非線形光学 / 光学応答

Outline of Final Research Achievements

The optical response of solid is useful to understand the physical property of materials. However, the spatial resolution cannot reach the atomic level due to the diffraction limit. Recently, we succeeded in visualizing the optical response to the vacuum ultra-violet light with an atomic resolution using X-ray parametric down-conversion (XPDC). Based on this result, the aim of this research was set to reveal the microscopic optical response to the visible light by XPDC. To measure the weak signal, a coincidence circuit with a ns-time resolution and high-efficiency detecting systems for the visible and the X-ray photons were developed. Nevertheless, suppression of the accidental coincidence between the visible fluorescence and the Bragg reflected X-rays was not sufficient, which prevented observation of XPDC into the visible region was not observed.

Research Products

• [Presentation] X線非線形光学と物質科学 (2014)
  • Author(s): 玉作賢治
  • Organizer: 理研ー東大ー阪大ジョイントセミナー
  • Place of Presentation: 大阪大学中之島センター
  • Year and Date: 2014-10-16 – 2014-10-17
  • Invited
• [Presentation] 結晶によるX線回折と分光器
  • Author(s): 玉作賢治
  • Organizer: 第27回日本放射光学会年会・放射光科学合同シンポジウム
  • Place of Presentation: 広島国際会議場、広島県
  • Invited