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Generation of Broadband Tunable Coherent X-rays by Using Optical Field Induced Ionization

Research Project

Project/Area Number 09450033
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied optics/Quantum optical engineering
Research InstitutionMiyazaki University

Principal Investigator

SASAKI Wataru  Miyazaki University Faculty of Engineering, Professor, 工学部, 教授 (30081300)

Co-Investigator(Kenkyū-buntansha) KAWANAKA Junji  Miyazaki University Faculty of Engineering, Lecturer, 工学部, 助手 (50264362)
KUBODERA Shoichi  Miyazaki University Faculty of Engineering, Associate Professor, 工学部, 助教授 (00264359)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥9,100,000 (Direct Cost: ¥9,100,000)
Fiscal Year 1998: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1997: ¥6,300,000 (Direct Cost: ¥6,300,000)
Keywordshigh intensity ultrashort pulse laser / optical field induced ionization / vacuum ultraviolet light source / rare-gas excimer molecule / coherent control / 軟X線 / コヒーレント光 / 多価イオン / 超短パルスレーザー / 光電界電離法 / 軟X線コヒーレント光 / 希ガスエキシマ / 真空紫外光
Research Abstract

We have demonstrated vacuum ultraviolet emissions from pulsed rare gas jet excited by a high intensity ultrashort pulse laser. Various emission characteristics are investigated thoroughly. Ultrashort pulse Lasers are also used to control the dissociation process of alkali halide molecules in a femtosecond time scale. These knowledge should be used to develop a practical coherent x-ray source in the laboratory scale.
As a result of the interaction of Ar and high intensity laser field, we have observed emissions from Ar_2^* at 126 nm for the first time together with some signals of high order harmonics. The focused laser intensity dependence of the Ar excimer intensity agrees well with that predicted by a tunnel ionization theory so called ADK theory. We, therefore, found out that the production of Ar excimers was initiated by high intensity laser produced electrons, which may become a substitution to those produced by an electron beam device.
Experimental data show no difference in terms of the Ar excimer emission when linearly polarized and circularly polarized laser beams interacted with Ar. Considering about the energy transport of electrons in a high intensity laser produced plasma theoretically, we have found out a rapid conductive cooling of a plasma plays an important role for the excimer pioduction.
The control of a molecule by using a high intensity laser has been demonstrated in the femtosecond time region as well. Alkali halide molecules have been excited and deexcited by using two different wavelength (ultraviolet and visible) lasers, which leads to the coherent control of the molecule with the minimum thermal effect This type of coherent molecular control means that the molecule can become a good optical amplifier even in a very short wavelength range, and can become a new coherent x-ray source.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (32 results)

All Other

All Publications (32 results)

  • [Publications] W.Sasaki: "Efficient VUV light sources from rare gas excimers and their applications" Proceedings of SPIE. 3092. 378-381 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.Kawanaka: "Improved output characteristics of a vacuum ultraviolet xenon gas jet discharge lamp with a magnetic field" Applied Physics. 65. 609-612 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 窪寺 昌一: "新しい発光形態を持つ真空紫外希ガスエキシマフラッシュランプ" 電気学会論文誌C. 117-C. 928-933 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 緒方 彰: "高性能真空紫外希ガスエキシマ光源の開発" 宮崎大学工学部紀要. 26. 89-96 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 桃北 陽介: "混合希ガスの電子ビーム励起による異種核希ガスエキシマレーザーに関する研究" 宮崎大学工学部紀要. 26. 97-102 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] S.Kubodera: "Kr excimers produced by soft x-rays emitted from a laser produced plasma" Applied Physics Letters. 73. 1463-1465 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] S.Kubodera: "Vacuum ultraviolet rare-gas excimer emissions initiated by high-intensity-laser-produced electrons" OSA Technical Digest. 6. 148-149 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] W.Sasaki: "The state of the art of rare gas excimer lasers and lamps as a light source for Giga-bit lithography" Journal of Photopolymer Science and Technology. 11. 361-366 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.Kawanaka: "A 1.5kW high peak power and 140 ns short pulse krypton excimer lamp using a pulsed silent discharge" Proceedings of SPIE. 3574. 466-469 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 徳永晋次: "真空紫外光による物質プロセス" 宮崎大学工学部紀要. 27. 173-176 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 米谷保幸: "放電励起希ガスエキシマレーザーの研究" 宮崎大学工学部紀要. 27. 169-172 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 加来昌典: "誘導ラマン効果を用いた希ガスエキシマの反転分布形成" 宮崎大学工学部紀要. 27. 163-167 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 井手上正人: "超短パルスレーザー励起短波長レーザーの研究" 宮崎大学工学部紀要. 27. 157-161 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 池田雅樹: "光励起短波長レーザーの研究" 宮崎大学工学部紀要. 27. 151-155 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Wataru Sasaki, Shoichi Kubodera, and Junji Kawanaka: ""Efficient VUV light sources from rare gas excimers and their applications"" XI International Symposium on Gas Flow and Chemical Lasers and High Power Laser Conference, Proc.SPIE. 3092. 378-381 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Junji Kawanaka, Akira Ogata, Shoichi Kubodera, Wataru Sasaki, and Kou Kurosawa: ""Improved output characteristics of a vacuum ultraviolet xenon gas jet discharge lamp with a magnetic field"" Appl.Phys.B vol.65. 609-612 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shoichi Kubodera, Junji Kawanaka, and Wataru Sasaki: ""A vacuum ultraviolet rare-gas excimer flash lamp with new emission spectra"" Trans.IEE of Japan. vol.117-C. 928-933 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Akira Ogata, Junji Kawanaka, Shoichi Kubodera, and Wataru Sasaki: ""Development of High-Performance Vacuum Ultraviolet Rare Gas Excimer Lamps"" Memoirs of the Faculty Engineering, Miyazaki University. vol.26. 89-96 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yosuke Momokita, Junji Kawanaka, Shoichi Kubodera, and Wataru Sasaki: ""Potentiality of laser oscillations with hetero-nuclear rare-gas excimers excited by electron beams"" Memoirs of the Faculty Engineering, Miyazaki University. vol.26. 97-102 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shoichi Kubodera, Masaki Ikeda, Jinji Kawanaka, and Wataru Sasaki: ""Kr excimers produced by soft x-rays emitted from a laser produced plasma"" Appl.Phys.Lett.vol.73. 1463-1465 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shoichi Kubodera, Junji Kawanaka, and Wataru Sasaki: ""Vacuum ultraviolet rare-gas excimer emissions initiated by high-intensity-laser-produced electrons"" Conference on Lasers and Electro-Optics, vol.6, 1998 OSA Technical Digest Series (Optical Society of America, Washington, DC, 1998). 148-149

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Wataru Sasaki, Kou Kurosawa, Shoichi Kubodera, and Junji Kawanaka: ""The state of the art of rare gas excimer lasers and lamps as a light source for Giga-bit lithography"" J.Photopolymer Science and Technology. vol.11. 361-366 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Junji Kawanaka, Takahiro Shirai, Shoichi Kubodera, and Wataru Sasaki: ""A 1.5kW high peak power and 140 ns short pulse krypton excimer lamp using a pulsed silent discharge"" XII International Symposium on Gas Flow and Chemical Lasers and High Power Laser Conference, Proc.SPIE. 3574. 466-469 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Shinji Tokunaga, Junji Kawanaka, Shoichi Kubodera, and Wataru Sasaki: ""Materials processing using vacuum ultraviolet emission"" Memoirs of the Faculty Engineering, Miyazaki University. vol.27. 173-176 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yasuyuki Kometani, Junji Kawanaka, Shoichi Kubodera, and Wataru Sasaki: ""Studies of discharge-pumped rare gas excimer lasers"" Memoirs of the Faculty Engineering, Miyazaki University. vol.27. 169-172 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Masanori Kaku, Junji Kawanaka, Shoichi Kubodera, and Wataru Sasaki: ""Population inversion of rare-gas excimers using stimulated Raman scattering"" Memoirs of the Faculty Engineering, Miyazaki University. vol.27. 163-167 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Masato Idegami, Junji Kawanaka, Shoichi Kubodera, and Wataru Sasaki: ""Studies of short wavelength lasers excited by an ultrashort pulse high intensity laser"" Memoirs of the Faculty Engineering, Miyazaki University. vol.27. 157-161 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Masaki Ikeda, Junji Kawanaka, Shoichi Kubodera, and Wataru Sasaki: ""Studies of an optically pumped short wavelength laser"" Memoirs of the Faculty Engineering, Miyazaki University. vol.27. 151-155 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] S.Kubodera 他: "Kr excimers produced by soft x rays emitted from a laser-produced plasma" Applied Physics Letters. 73巻、11号. 1463-1465 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 河仲 準二 他: "放電励起希ガスエキシマレーザーの基礎過程" レーザー学会研究会報告 レーザー応用. RTM-98-41. 35-40 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Wataru Sasaki 他: "The state of the art of rare gas excimer lasers and lamps as a light source for giga-bit lithography" J.Photopolymer Sci.Tech.11巻、2号. 361-366 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Junji Kawanaka: "A1.5 kw high peak power and 140 ns short pulse krypton excimer lamp using a pulsed silent-discharge" Proceedings of SPIE. 3574巻. 466-469 (1998)

    • Related Report
      1998 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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