| Project/Area Number |
15H03993
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | Kyoto University |
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Principal Investigator |
Asano Takashi 京都大学, 工学研究科, 准教授 (30332729)
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| Research Collaborator |
SONG Bong-Shik 成均館大学, 電子電機工学部, 教授
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
Fiscal Year 2017: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2015: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Keywords | シリコンカーバイド / フォトニック結晶 / ナノ光デバイス / 光共振器 / 光非線形効果 / ナノ共振器 / 高Q値化 / 2次高調波 |
|---|
| Outline of Final Research Achievements |
We have improved the optical loss of SiC photonic crystals, which are expected to overcome the issues in Si photonic crystals such as suppression of two-photon absorption, operation at visible range, etc. We have found that thin film SiC of SiC on insulator substrate has linear absorption loss originates from the fabrication process, and proposed a fabrication method to avoid this issue. As a result, a low-loss SiC photonic crystal nanocavity with a Q factor of 300 thousand has been realized, which means that optical loss has been suppressed to be less than 1/30 of the value before this research. Enhancement of optical nonlinearity based on a high-Q SiC nanocavity has been also investigated, and high normalized second harmonic conversion efficiency of 1400%/W has been observed.
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