Evaluation of hydrogen-bonding distance in organic nonlinear optical crystals by neutron diffraction for high-transmitted terahertz-wave source

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K20880
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Quantum beam science; Optical engineering, Photon science
• Research Institution: Ibaraki University
• Principal Investigator: Matsukawa Takeshi 茨城大学, フロンティア応用原子科学研究センター, 助教 (60580876)
• Research Collaborator: NAWATA KOUJI 理化学研究所, 研究員 (90586405)
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 有機非線形光学材料 / 中性子回折 / 結晶成長 / テラヘルツ波

Outline of Final Research Achievements

The hydrogen-bonding distances in halogen-substituted stilbazolium derivative crystals, which are organic-nonlinear optical crystals, were quantitatively evaluated by using powder neutron diffraction for high-transmitted terahertz (THz) wave sources. The transmittance of the derivatives in the THz region became lower. In addition, the THz absorption at around 1 THz were dependent on the hydrogen-bonding interaction between the cation and the anion. Elongation of the interionic distances by changing the substituents seems to be effective in decreasing the absorption of the derivetive crystals in the THz region.

Free Research Field

有機材料化学