Real-time terahertz spectroscopic imaging system

2008 Fiscal Year Final Research Report

• Project/Area Number: 18686008
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Single-year Grants
• Research Field: Applied optics/Quantum optical engineering
• Research Institution: Osaka University
• Principal Investigator: YASUI Takeshi Osaka University, 大学院・基礎工学研究科, 助教 (70314408)
• Project Period (FY): 2006 – 2008
• Keywords: 非破壊検査 / フェムト秒レーザー / 分光 / テラヘルツ / 非線形光学効果

Research Abstract

テラヘルツ(THz)分光イメージングは、成分分析型の内部透視手段として各応用分野の利用が期待されているが、極めて長い測定時間が実用化への障害となっていた。本研究では、電気光学的時間-空間変換による実時間THz時間波形計測と線集光THz結像光学系による実時間THzラインイメージングを複合したTHzカラースキャナーの開発を行った。その結果、測定時間が従来法の1/10,000以下まで短縮され、世界で初めて動体サンプルのTHz分光イメージングに成功した。

Research Products

• [Journal Article] テラヘルツ波検査技術の進展 (2009)
  • Author(s): 安井武史
  • Journal Title: 超伝導Web21 2009年2月号 Pages: 10-12
• [Journal Article] Terahertz spectrum analyzer based on a terahertz frequency comb (2008)
  • Author(s): S. Yokoyama, R. Nakamura, M. Nose, T. Araki, and T. Yasui
  • Journal Title: Optics Express 16 Pages: 13052-13061
  • Peer Reviewed
• [Journal Article] Real-time terahertz color scanner for moving objects (2008)
  • Author(s): T. Yasui, K. Sawanaka, A. Ihara, E. Abraham, M. Hashimoto, and T. Araki
  • Journal Title: Optics Express 16 Pages: 1208-1221
  • Peer Reviewed
• [Journal Article] テラヘルツ波を用いた塗膜モニタリング技術 (2008)
  • Author(s): 安井武史、安田敬史、荒木勉
  • Journal Title: 塗装工学 43 Pages: 389-397
  • Peer Reviewed
• [Journal Article] Improvement of minimum paint film thickness for THz paintmeters by multiple regression analysis (2007)
  • Author(s): T. Yasuda, T. Iwata, T. Araki, and T. Yasui
  • Journal Title: Applied Optics 46 Pages: 7518-7526
  • Peer Reviewed
• [Journal Article] テラヘルツ周波数コムの発生及び検出 (2007)
  • Author(s): 安井武史
  • Journal Title: レーザー研究 35 Pages: 627-632
  • Peer Reviewed
• [Journal Article] Real-time two-dimensional terahertz tomography of moving objects (2006)
  • Author(s): T. Yasuda, T. Yasui, T. Araki, and E. Abraham
  • Journal Title: Optics Communications 267 Pages: 128-136
  • Peer Reviewed
• [Journal Article] Terahertz frequency comb by multi-frequency-heterodyning photoconductive detection for high-accuracy, high-resolution terahertz spectroscopy (2006)
  • Author(s): T. Yasui, Y. Kabetani, E. Saneyosh, S. Yokoyama, and T. Araki
  • Journal Title: Applied Physics Letters 88 Pages: 241104
  • Peer Reviewed
• [Presentation] Terahertz spectrum analyzer for precise frequency measurement of CW THz source (2009)
  • Author(s): T. Yasui, R. Nakamura, A. Ihara, S. Yokoyama, H. Inaba, K. Minoshima,and T. Araki
  • Organizer: International Workshop on Terahertz Science and Technology
  • Place of Presentation: Santa Barbara, USA
  • Year and Date: 2009-03-10
• [Presentation] Terahertz color scanner for moving object (2008)
  • Author(s): T. Yasui, K. Sawanaka, A. Ihara, E. Abraham, and T. Araki
  • Organizer: EOS Annual Meeting 2008 : Topical meeting of Terahertz Science and Technology
  • Place of Presentation: Paris, France
  • Year and Date: 2008-09-29
• [Presentation] Real-time, terahertz impulse radar based on asynchronous optical sampling (2008)
  • Author(s): T. Yasui, Y. Kabetani, S. Yokoyama, and T. Araki
  • Organizer: Joint 33rd International Conference on Infrared and Millimeter Waves and 15th International Conference on Terahertz Electronics
  • Place of Presentation: Pasadena, California, USA
  • Year and Date: 2008-09-15
• [Presentation] Real-time, one-dimensional terahertz time-domain spectroscopic imaging of moving object (2007)
  • Author(s): T. Yasui, K. Sawanaka, A. Ihara, and T. Araki
  • Organizer: Joint 32nd International Conference on Infrared and Millimeter Waves and 15th International Conference on Terahertz Electronics
  • Place of Presentation: Cardiff, England
  • Year and Date: 2007-09-03
• [Presentation] Terahertz frequency-domain spectroscopy referring to as terahertz frequency comb (2007)
  • Author(s): T. Yasui, Y. Kabetani, S. Yokoyama and T. Araki
  • Organizer: Optical Terahertz Science and Technology
  • Place of Presentation: Orlando, USA
  • Year and Date: 2007-02-19
• [Presentation] Noncontact terahertz paintmeter for real-time two-dimensional cross-section imaging of paint film thickness (2006)
  • Author(s): T. Yasui, T. Yasuda, K. Sawanaka, and T. Araki
  • Organizer: 9th European Conference on Non-Destructive Testing
  • Place of Presentation: Berlin, German
  • Year and Date: 2006-09-26
• [Book] テラヘルツ技術総覧(分担執筆) (2007)
  • Author(s): 安井武史
  • Total Pages: 389-393, 450-456
  • Publisher: NGTコーポレーション社
• [Remarks] 『テラヘルツ波で検査/阪大、電波の乱れ利用/食品の混入農薬や危険物』日経産業新聞第11面(2008/3/19).
• [Remarks] 『動体測定可能に/阪大、"カラースキャナー"開発/テラヘルツ波利用/荷物検査など応用』,日刊工業新聞第22面(2008/3/13)
• [Remarks] "Speedy and Colorful Terahertz Scanning/ Real-time imaging technique permits investigation of objects in motion", PHOTONICS SPECTRA, 42, 25-28, 2008.
• [Remarks] 『驚きの透視パワー 不思議の波 テラヘルツ』, NHK教育テレビ サイエンスゼロ(2007/2/17放送)
• [Remarks] 安井武史, 2009年度応用物理学会光学論文賞, Real-time terahertz color scanner for moving objects, Optics Express, 16, 1208-1221, 2008.
• [Remarks] 安井武史, 橋本守, 荒木勉, 日本機械学会船井賞,『テラヘルツ・カラースキャナーの開発』
• [Remarks] ホームページ
  • URL: http://sml.me.es.osaka-u.ac.jp/araki_lab/research/thz/index.html