Photo irradiation effects on nonlinear optical properties in graphene oxide

• Project/Area Number: 17K05504
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Konan University
• Principal Investigator: Ichida Masao 甲南大学, 理工学部, 教授 (30260590)
• Co-Investigator(Kenkyū-buntansha): 青木 珠緒 (松本珠緒) 甲南大学, 理工学部, 教授 (80283034)
• Project Period (FY): 2017-04-01 – 2022-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000); Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2018: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2017: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
• Keywords: ナノカーボン / 酸化グラフェン / 光照射効果 / 非線形光学応答 / グラフェン / II-VI族半導体量子ドット / 光物性 / ナノ材料 / 非線形光学

Outline of Final Research Achievements

We have measured third-order nonlinear susceptibility of graphene oxides by a combination of Z-scan and saturation power density method around the absorption edge. The absolute value of imaginary part of third-order nonlinear susceptibility increases with increasing photon energy. On the other hand, the figure of merit of nonlinearity (the ratio of third-order nonlinear susceptibility to absorption coefficient) increases with decreasing photon energy. After photo irradiation to graphene oxide sample, the values of figure of merit decrease and approach that for graphene dispersion sample. These result can be explained by the decrease of lifetime in graphene nanodisc embedded in graphene oxide.

Academic Significance and Societal Importance of the Research Achievements

グラフェンはその特異な電子状態から新規デバイス材料として注目されているが、その試料の取り扱い上の問題などから、その光学特性、特に、非線形光学応答についてはほとんど研究が行われていない。それに対して酸化グラフェンは、水などの溶媒に可溶であり、その取り扱いは容易である。本研究では、酸化グラフェンの非線形光学応答とその光照射効果についての研究を行った。その結果は、酸化グラフェンに関する物性物理の立場だけでなく、デバイス材料としての応用の可能性に関する知見を得ることも出来た。

Research Products

• [Journal Article] Simple and Downsized Amplification System of a Femtosecond Laser Pulse using Dye Gain Media (2022)
  • Author(s): Kenshi NAKAMURA, Masao ICHIDA, Yukio NAKAJIMA, Makoto YOSHIDA, Takahisa JITSUNO
  • Journal Title: 甲南大学紀要. 理工学編 = Memoirs of Konan University. Science and Engineering Series Volume: 68 Issue: 2 Pages: 3-7
  • DOI: 10.14990/00004077
  • ISSN: 2434-6446
  • URL: http://id.nii.ac.jp/1260/00004077/
  • Year and Date: 2022-02-28
  • Peer Reviewed
• [Presentation] 酸化グラフェンの 三次光学非線形性 (2020)
  • Author(s): 市田正夫, 細見勇登, 松田一成
  • Organizer: 光物性研究会
• [Presentation] Third-order nonlinear optical properties in photo-reduced graphene oxide (2019)
  • Author(s): Masao ICHIDA, Yuto HOSOMI , Kazunari MATSUDA, Hiroaki ANDO
  • Organizer: 20th International Conference on the Science and Application of Nanotubes and Low-dimensional Materials (NT19)
  • Int'l Joint Research
• [Presentation] Photo irradiation effects on luminescence dynamics in graphene oxide (2018)
  • Author(s): Yuto Hosomi , Yusuke Minamihata , Kazunari Matsuda , Hiroaki Ando, Masao Ichida
  • Organizer: NT18: International Conference on the Science and Application of Nanotubes and Low-Dimensional Materials
  • Int'l Joint Research
• [Presentation] 酸化グラフェンの三次非線形光学応答の光照射効果とその起源 (2017)
  • Author(s): 細見勇登, 南畑侑亮, 松田一成, 安藤弘明, 市田正夫
  • Organizer: 光物性研究会