Further advancement of Cherenkov phase-matched electro-optic sampling and its application to THz wave imaging

2015 Fiscal Year Final Research Report

• Project/Area Number: 25286066
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Optical engineering, Photon science
• Research Institution: University of Fukui
• Principal Investigator: TANI Masahiko 福井大学, 遠赤外領域開発研究センター, 教授 (00346181)
• Co-Investigator(Kenkyū-buntansha): KAWASE Kodo 名古屋大学, 工学(系)研究科(研究院), 教授 (00296013) ; KURIHARA Kazuyoshi 福井大学, 教育地域科学部, 教授 (20270704) ; YAMAMOTO Kohji 福井大学, 遠赤外領域開発研究センター, 准教授 (70432507)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: テラヘルツ / 電気光学サンプリング

Outline of Final Research Achievements

We have developed a new electro-optic sampling (EOS) scheme, "heterodyne Cherenkov EOS," for detection of THz pulsed radiation based on the Cherenkov phase-matched EOS, which was also invented by ourselves. About 20 times enhancement in the THz detection efficiency was achieved by using a tapered parallel plate metallic waveguide. In addition, the detection bandwidth of this technique was extended to 2.5 THz by using a slab waveguide structure in LiNbO3 crystal. We have investigated systematically the spatial signal distribution in the Cherenkov-EOS, the properties of which made it possible to realize the frequency resolved THz wave detection and the optimization of Cherenkov-EOS optical detection system.

Free Research Field

テラヘルツ分光