2013 Fiscal Year Final Research Report
development of light harvesting structure using random medium
| Project/Area Number |
24651111
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Nanostructural science
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| Research Institution | Hokkaido University |
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Principal Investigator |
FUJIWARA Hideki 北海道大学, 電子科学研究所, 准教授 (10374670)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 不規則構造 / 光局在 / ランダムレーザー |
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| Research Abstract |
Towards the development of a novel light-harvesting surface structure, I experimentally validate the controllability of random lasing modes on the basis of the resonant properties of surrounding scatterers and intentionally introduced defect nanoparticles. By adjusting the sizes of scatterers and defects, we experimentally clarified that the random lasing modes (lasing peak wavelength and the number of lasing peaks) at a defect region within a spherical ZnO nanoparticle film can be controlled. In addition, I also demonstrated a novel UV random lasing from a diamond nanoparticle film, in which nonlinear evolution of discrete sharp peaks at wavelengths around 380 nm, a wavelength never before observed, was observed. Because these results suggest the possibility of manipulating the optical characteristics even in random media, these results should provide important knowledge for the realization of highly efficient light harvesting structure.
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[Presentation] Quasi-single mode random laser2013
Author(s)
H. Fujiwara, R. Niyuki, T. Tsuji, Y. Ishikawa, N. Koshizaki, and K. Sasaki
Organizer
Collaborative Conference on Materials Research
Place of Presentation
Ramada Plaza Jeju Hotel, South Korea
Year and Date
2013-06-27
Invited
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[Remarks] 2013年9月「ランダムレーザで良好な発振を実現—球状のサブマイクロ粒子が成功のカギ」Laser Focus World Japan 2013.9(研究室探訪), 16-17、(2013)
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[Remarks] 2013年2月14日「発振特性優れるランダムレーザー素子開発、ZnO粒子利用」化学工業日報
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[Remarks] 2013年2月13日「酸化亜鉛のサブマイクロ粒子、ランダムレーザー素子に」日刊工業新聞
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[Remarks] 2013年2月12日「酸化亜鉛粒子を用いた発振特性に優れたランダムレーザー素子を開発」日経電子板プレスリリース
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