2013 Fiscal Year Final Research Report
Direct measurement of a wave propagating inside a plasma photonic crystal for investigating a novel functional property
| Project/Area Number |
23654197
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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 |
Plasma science
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| Research Institution | Tohoku University (2013)
Iwate University (2011-2012) |
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Principal Investigator |
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| Project Period (FY) |
2011 – 2013
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| Keywords | プラズマフォトニック結晶 / 低気圧プラズマ / マイクロ波 / バンドギャップ |
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| Research Abstract |
In order to directly measure the electromagnetic field of the waves propagating inside photonic crystals, the dielectric constant in the argon gas is spatially modified by the presence of the low-pressure discharge. The periodic plasma structure is successfully produced by locating the high-voltage electrode, which has a periodic structure and is biased by a 400 kHz radiofrequency power supply, the plasma density above 10^10 cm^-3 can be obhtained. The microwave is also injected into the plasma photonic crystal and the appearance of the propagation band-gap is detected near the frequency of 2-3 GHz. The wave propagation in such periodic plasma structure is analyzed in one-dimensional model and the results are in fair agreement with the transmittance characteristic observed in the experimental plasma photonic crystal. This will provide important insights into the photonic cyrstal physics in linear and non-linear regime.
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