2019 Fiscal Year Final Research Report
Development of ultralow loss photonic crystals at 1-THz band
| Project/Area Number |
17H01064
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Optical engineering, Photon science
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| Research Institution | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Keywords | テラヘルツ / フォトニック結晶 / 1 THz / 回路 / 導波路 / 高周波 / 集積 / シリコン |
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| Outline of Final Research Achievements |
The 1-THz frequency band corresponds to the upper limit of electronics operating speeds. One of the most critical issues in the 1-THz band is the large losses in conventional metal electronic circuits. In this study, 1-THz-band circuits based on metal-free silicon photonic crystals, which are dielectric microstructures with a periodic refractive index that is distributed on a scale comparable to the wavelength, were developed. The propagation losses are as low as 0.1 dB/cm at 1-THz band, which is one order of magnitude smaller than that of present metallic hollow waveguides. Error-free data transmission at a data rate of 1 Gbit/s using a developed waveguide is demonstrated, showing the promise of photonic crystals in the 1-THz band.
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| Free Research Field |
光エレクトロニクス
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| Academic Significance and Societal Importance of the Research Achievements |
1 THz帯は，エレクトロニクスにおける高周波極限に相当する．その物理限界の一つである金属による損失を光に関する科学技術であるフォトニクス分野のアイディアであるフォトニック結晶によって克服できることを示したことは学術的に意義深い．0.1 THzから10 THzの周波数の電磁波であるテラヘルツ波を用いた通信・センシング応用が期待されており，特にデバイス・回路の開発が困難な1 THz帯の応用可能性を示したことは，新たな周波数帯の電磁波の利活用につながるため，社会的な意義が大きい．
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