成果報告書詳細
管理番号20110000000748
タイトル*平成22年度中間年報 省エネルギー革新技術開発事業/先導研究/フォノン援用励起過程を用いた赤外光-可視光変換膜作製のための基盤技術の研究開発
公開日2011/10/12
報告書年度2010 - 2010
委託先名浜松ホトニクス株式会社 国立大学法人東京大学
プロジェクト番号P09015
部署名エネルギー対策推進部
和文要約和文要約等以下本編抜粋:1. 研究開発の内容及び成果等 1) 研究開発の内容 (1) 事業目的 従来の赤外光センサはノイズを低減するための冷却機構が必要であるため、光計測装置全体が大型化し、消費電力が大きくなり、優れた光源や光学部品が存在するにもかかわらず赤外光の産業利用が制限されていた。これを解決する手段として、赤外光を可視光に変換する方法もあるが、課題が多く、ごく限られた分野での利用にとどまっているのが現状である。
英文要約Title:Research and development of the basic technology for infrared-visible light wavelength conversion-film manufacture using the phonon-assisted excitation process
(FY2010-FY2011) FY2010 Annual Report
Because the conventional infrared photosensor needs a cooler to reduce its dark noise coming from narrow band gap of the material of the infrared photosensor, the whole photosensor size and its power consumption increase. Therefore, the industrial use of the infrared light is restricted to special operating environment. The goal of this development is an establishment of a basic technology for manufacturing the infrared-visible wavelength conversion film based on the phonon-assisted excitation process. This technology is epoch-making energy conversion technique, which is independent on the material properties, e.g., a band gap, dispersion of refractive index, and so on. This innovative technology also reduces the material cost, the environmental load, and the rare resource wasting in addition to reducing the power consumption by withdrawing the photosensor cooler. We are also going to expand the potential of the utilizing the infrared light, which was not used enough so far.
1. Design, manufacture and evaluation of the wavelength conversion film.
The first task of this development is clarifying the most suitable method to obtain the dye-grains constituting a convertor. The performance depends on the shapes and sizes of the dye-grains. First, the recrystallization method on a glass substrate using a dye solution was adopted with consideration for comparatively high controllability of size and shape of the dye-grains. The dependences of shape and size of dye-grains on the recrystallization conditions were clarified. The performance of the manufactured convertor was measured.
2. Quantitative mechanism elucidation of the phonon-assisted excitation process by optical near field
The second task of this development is clarifying the observation method of the shape and size of dye-grains manufactured in the task 1. The manufactured convertors were observed by using SEM, AFM, SNOM, etc. In addition, the shape and optical characteristics of the dye-grains were evaluated by using the microscope spectroscopy. The calculation technique and modelization were discussed to simulate the distribution of optical near field around dye-grains. Furthermore, the experimental setups of the pump and probe method was constructed to measure the phonon vibration modes, which assist the two-step excitation process. Finally, the time resolution of the experimental setup was measured. This result indicated that the ability of the experimental setup was enough high to observed the phonon vibration mode used in the phonon-assisted excitation process by pump probe method with Raman scattering spectroscopy.
3. Development of the autonomous shape optimization method of the dye-grains using phonon-assisted excitation process for wavelength conversion film.
The third task of this development is construction of the efficient fabrication method based on the features of the optical near-field. The fabrication machine was installed for the first fiscal year.
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