Nonlinear optical responses and relaxation processes of photo-carriers in open-shell π-electronic systems

• Project/Area Number: 22340079
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Nagoya University
• Principal Investigator: KISHIDA Hideo 名古屋大学, 工学研究科, 教授 (40311633)
• Co-Investigator(Renkei-kenkyūsha): UNUMA Takeya 名古屋大学, 工学研究科, 助教 (20456693) ; KOYAMA Takeshi 名古屋大学, 工学研究科, 講師 (20509070)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥19,890,000 (Direct Cost: ¥15,300,000、Indirect Cost: ¥4,590,000); Fiscal Year 2012: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2011: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2010: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
• Keywords: 光物性 / 共役系高分子 / 開殻電子系 / ドーピング / イオン液体 / ポンププローブ分光 / 非線形光学 / 緩和過程 / 開殻π電子系

Research Abstract

We have investigated the nonlinear optical properties of two open-shell π-electronic systems: doped π-conjugated polymers and biradical molecular compounds. The chemical doping to the conjugated polymers give s rise to the formation of polarons. We performed pump-probe spectroscopy for the doped states of conjugated polymers and revealed that the doping drastically shortens the relaxation time. The pump-probe spectra clarified the interaction of the chemically induced polaron states and the photo-induced species. In the biradical molecular compounds, we revealed the enhanced third-order optical nonlinearity using the third-harmonic generation spectroscopy . Moreover, the experimental results by electromodulation spectroscopysuggest the enhancement mechanism of optical nonlinearity resulting from the degeneracy of the excited states.

Research Products

• [Journal Article] Multiply-resonant nonlinear optical processes in doped polythiophenes (2010)
  • Author(s): Hideo Kishida, Kenichi Hibino, and Arao Nakamura
  • Journal Title: Applied Physics Letters Volume: 97 (10) Issue: 10
  • DOI: 10.1063/1.3486160
  • Peer Reviewed
• [Journal Article] Terahertz complex conductivities of carriers with partial localization in doped polythiophenes (2010)
  • Author(s): Takeya Unuma, Kenji Fujii, Hideo Kishida, and Arao Nakamura
  • Journal Title: Applied Physics Letters Volume: 97(3) Issue: 3
  • DOI: 10.1063/1.3466916
  • Peer Reviewed
• [Journal Article] Third-order nonlinear optical properties of a π-Conjugated biradical molecule investigated by third-harmonic generation spectroscopy (2010)
  • Author(s): H.Kishida, K.Hibino, A.Nakamura, D.Kato, J.Abe
  • Journal Title: Thin Solid Films Volume: 519 Pages: 1028-1030
  • Peer Reviewed
• [Journal Article] Multiply-resonant nonlinear optical processes in doped polythiophenes (2010)
  • Author(s): H.Kishida, K.Hibino, A.Nakamura
  • Journal Title: Applied Physics Letters Volume: 97
  • Peer Reviewed
• [Presentation] Femtosecond optical study of chemically induced polaron states in polythiophene films (2013)
  • Author(s): Hideo Kishida, Takaki Fujii, Tomoya Uchida, Takeshi Koyama, Arao Nakamura
  • Organizer: APS March Meeting 2013
  • Place of Presentation: Baltimore, Maryland, USA
  • Year and Date: 2013-03-20
• [Presentation] Photoexcited states of chemically and electrochemically doped polythiophenes (2012)
  • Author(s): H. Kishida, T. Fujii, T. Uchida, T. Koyama, A. Nakamura
  • Organizer: International Union of Materials Research Societies - International Conference on Electronic Materials 2012 (IUMRS-ICEM 2012)
  • Place of Presentation: 横浜市
  • Year and Date: 2012-09-25
• [Presentation] 化学ドープされたポリチオフェンにおける近赤外発光のダイナミクス (2012)
  • Author(s): 小山剛史,岸田英夫,中村新男
  • Organizer: 日本物理学会 2012 年秋季大会
  • Place of Presentation: 横浜国立大学 常盤台キャンパス
  • Year and Date: 2012-09-21
• [Presentation] 環状チアジルバイラジカル化合物 NTの非線形光学特性と電子構造 (2012)
  • Author(s): 鷹氏啓吾, 水津理恵, 阿波賀邦夫, 岸田英夫, 中村新男
  • Organizer: 日本化学会第92 春季年会
  • Place of Presentation: 慶應義塾大学日吉キャンパス
  • Year and Date: 2012-03-26
• [Presentation] イオン液体を用いて高濃度ドーピングしたポリチオフェン薄膜の光学応答(ポスター) (2012)
  • Author(s): 藤井鷹希, 岸田英夫, 小山剛史, 中村新男
  • Organizer: 第59回応用物理学関係連合講演会
  • Place of Presentation: 早稲田大学
  • Year and Date: 2012-03-15
• [Presentation] イオン液体を用いて高濃度ドーピングしたポリチオフェン薄膜の光学応答 (2012)
  • Author(s): 藤井鷹希、岸田英夫、小山剛史、中村新男
  • Organizer: 第59回応用物理学関係連合講演会
  • Place of Presentation: 早稲田大学(東京都)
  • Year and Date: 2012-03-15
• [Presentation] Nonlinear optical properties in doped polythiophenes (2011)
  • Author(s): Hideo Kishida, Kenichi Hibino, Tomoya Uchida, Akihiro Kondo, Takeshi Koyama, and Arao Nakamura
  • Organizer: India-Japan Workshop on Biomolecular Electronics & Organic Nanotechnology for Environment Preservation (IJWBME2011)
  • Place of Presentation: 兵庫県姫路市
  • Year and Date: 2011-12-08
• [Presentation] Nonlinear optical properties in doped polythipphenes (2011)
  • Author(s): H.Kishida, K.Hibino, T.Uchida, A.Kondo, T.Koyama, A.Nakamura
  • Organizer: India-Japan Workshop on Biomolecular Electronics & Organic Nanotechnology for Environment Preservation (IJWBME2011)
  • Place of Presentation: イーグレひめじ(兵庫県)(招待講演)
  • Year and Date: 2011-12-08
• [Presentation] 導電性高分子におけるテラヘルツ複素伝導度のキャリア密度依存性 (2011)
  • Author(s): 鵜沼毅也 , 岸田英夫 , 中村新男, Eun-Young Hong, Suck-Hyun Lee, O-Pil Kwon
  • Organizer: 日本物理学会 2011 年秋季大会
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-23
• [Presentation] 環状チアジルバイラジカル化合物 NTの非線形光学特性 (2011)
  • Author(s): 鷹氏 啓吾, 水津 理恵, 阿波賀 邦夫, 岸田 英夫, 中村 新男
  • Organizer: 分子科学討論会 2011
  • Place of Presentation: 北海道大学
  • Year and Date: 2011-09-21
• [Presentation] Nonlinear optical spectroscopy of polaron states in doped conjugated polymers (2011)
  • Author(s): Hideo Kishida, Kenichi Hibino, Akihiro Kondo, Tomoya Uchida, Takeshi Koyama, and Arao Nakamura
  • Organizer: ICL'11 (16th International conference on luminescence & optical spectroscopy of condensed matter)
  • Place of Presentation: Ann Arbor, Michigan, USA
  • Year and Date: 2011-06-28
• [Presentation] Nonlinear optical spectroscopy of polaron states in doped conjugated polymers (2011)
  • Author(s): H.Kishida, K.Hibino, A.Kondo, T.Uchida, T.Koyama, A.Nakamura
  • Organizer: 16th International conference on luminescence & optical spectroscopy of condensed matter
  • Place of Presentation: Ann Arbor, Michigan, USA
  • Year and Date: 2011-06-28
• [Presentation] Ultrafast nonlinear optical spectroscopy in doped polythiophenes (2011)
  • Author(s): H.Kishida, K.Hibino, A.Kondo, T.Uchida, T.Koyama, A.Nakamura
  • Organizer: Six International conference on molecular electronics and bioelectronics
  • Place of Presentation: 要旨集
  • Year and Date: 2011-03-15
• [Presentation] Complex conductivity spectra of doped polythiophenes in the THz region (2010)
  • Author(s): T. Unuma, K. Fujii, H. Kishida, and A. Nakamura
  • Organizer: ICSM2010 (International Conference on Science and Technology on Synthetic Metals 2010)
  • Place of Presentation: 京都市
  • Year and Date: 2010-07-06
• [Presentation] Femtosecond pump-probe spectroscopy in a conducting polymer, PEDOT -PSS (2010)
  • Author(s): T. Uchida, A. Kondo, T. Koyama, H. Kishidaand A. Nakamura
  • Organizer: ICSM2010 (International Conference on Science and Technology on Synthetic Metals 2010)
  • Place of Presentation: 京都市
  • Year and Date: 2010-07-05
• [Presentation] Femtosecond pump-probe spectroscopy in a conducting polymer, PEDOT-PSS (2010)
  • Author(s): T.Uchida, A.Kondo, T.Koyama, H.Kishida, A.Nakamura
  • Organizer: International conference on science and technology on synthetic metals 2010
  • Place of Presentation: 京都国際会館(京都市)
  • Year and Date: 2010-07-05
• [Presentation] DC-biased electroabsorption measurements of head-to-head polythiophenes (2010)
  • Author(s): A.Kondo, H.Kishida, A.Nakamura, T.Sato, T.Iijima, T.Yamamoto
  • Organizer: International conference on science and technology on synthetic metals 2010
  • Place of Presentation: 京都際会館(京都市)
  • Year and Date: 2010-07-05
• [Presentation] Photoexcited states of chemically and electrochemically doped polythiophenes
  • Author(s): Hideo Kishida, Takaki Fujii, Tomoya Uchida, Takeshi Koyama, Arao Nakamura
  • Organizer: International Union of Materials Research Societies - International Conference on Electronic Materials 2012 (IUMRS-ICEM 2012)
  • Place of Presentation: Yokohama, Japan
• [Presentation] Femtosecond optical study of chemically induced polaron states in polythiophene films
  • Author(s): Hideo Kishida, Takaki Fujii, Tomoya Uchida, Takeshi Koyama, Arao Nakamura
  • Organizer: APS March meeting 2013
  • Place of Presentation: Baltimore, Maryland, USA
• [Book] "Third-order nonlinear optical properties of π-conjugated polymers constituted of thiophene units and molecular assembly of the polymers" (Handbook of organic materials for optical and optoelectronic devices: Properties and applications, ISBN: 978-0-85709-265-6) (2013)
  • Author(s): Hideo Kishida and T akakazu Yamamoto, Woodhead Publishing