| Project/Area Number |
26600070
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Applied materials
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| Research Institution | Utsunomiya University |
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Principal Investigator |
Barada Daisuke 宇都宮大学, 工学(系)研究科(研究院), 准教授 (80400711)
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| Research Collaborator |
TOZAWA Ryoma
SUZUKI Ryotaro
OWADA Masato
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 光ランダムアクセスメモリ / ホログラフィ / 光誘起表面変形 / アゾベンゼンポリマー / 揮発性ホログラム / 空間光変調器 / アゾベンゼン |
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| Outline of Final Research Achievements |
In this study, a photo-driven deformable diffractive optical element (PDDOE) was investigated to use as a holographic random access memory.The PDDOE is made of an azobenzene-containing polymer film. The surface deformation is induced on the film by holographic recording in writing process. However, the surface structure is removed by readout light when the wavelength for writing and reading is identical. Therefore, in order to use the PDDOE as a holographic random access memory, it is important to find a condition that the photoinduced surface structure is maintained in reading process. We found that the reduction duration in reading is delayed when the light intensity ratio between signal and reference beams is large. In the situation, the surface structure becomes like a blazed grating so that high diffraction efficiency is obtained corresponding to surface relief depth. In addition, it is succeed that the reduction duration was delayed further by introducing optical feedback system
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