| Project/Area Number |
25600109
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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 |
Optical engineering, Photon science
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KONISHI Kuniaki 東京大学, 工学(系)研究科(研究院), 助教 (60543072)
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| Project Period (FY) |
2013-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2013: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
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| Keywords | メタマテリアル / 非線形光学効果 / 偏光 / 波長変換 |
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| Research Abstract |
Nonlinear metamaterials which consist of sub-wavelength artificial structures created by state-of-the-arts nanofabrication technology have been attracting attentions as new class of materials which enhance nonlinear optical responses. Symmetry of structures is critical for polarization control in nonlinear optical processes, such as second-harmonic generation (SHG), which is important as a wavelength-conversion technique. In this study, we aimed to fabricate high-efficiency and polarization-controllable SHG device using metal nano-net structures with threefold rotational symmetry. We demonstrate that, in achiral metal nanostructures with threefold rotational symmetries, a circularly polarized fundamental beam produces a countercircularly polarized second-harmonic beam. These presented results are of practical importance for developing ultra-small circularly polarized light emitter and wavelength-conversion devices by using conventional semiconductor and/or metallic materials.
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