2013 Fiscal Year Final Research Report
Terahertz-wave generation and detection via surface phonons and plasmons in Reststrahlen bands
| Project/Area Number |
23560053
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Applied physics, general
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| Research Institution | Nihon University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
MINAMIDE Hiroaki 独立行政法人理化学研究所, 光量子工学研究領域, チームリーダー (10322687)
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| Project Period (FY) |
2011 – 2013
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| Keywords | テラヘルツ波 / 表面フォノン / 表面プラズモン / 表面波発生・検出 / コヒーレンス |
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| Research Abstract |
Novel terahertz-wave generation and detection via surface phonon modes were studied, in order to explore Reststrahlen bands at terahertz-phonon frequencies. Using numerical analysis, we found novel dispersion relations of surface phonons in a nonlinear optical crystal as well as radiative terahertz field patterns. Based on the analyzed structures, high-quality surface gratings were successfully fabricated on lithium niobate crystals, using reactive ion etching. Ultra-broad, sensitive terahertz-wave detection was also realized under ambient temperature, using nonlinear frequency mixing of terahertz and optical waves.
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