2013 Fiscal Year Final Research Report
A grating-based plasmon biosensor utilizing phase detection to realize high resolution
| Project/Area Number |
23560404
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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 |
Electron device/Electronic equipment
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| Research Institution | Kumamoto University |
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Principal Investigator |
OKUNO Yoichi 熊本大学, 自然科学研究科, 教授 (50117082)
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| Co-Investigator(Kenkyū-buntansha) |
SUYAMA Taikei 明石工業高等専門学校, 電気情報工学科, 准教授 (70336204)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 回折格子 / プラズモン / バイオセンサ / 位相検出 |
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| Research Abstract |
Making use of plasmon surface wave excitation on a metal grating, we performed a study to develop a refractive index sensor with more than 7-digit resolution. We itemize main results of our study in theoretical analysis and in experimental inspection separately.
Results in theoretical analysis: (1) If we employ conical mounting to use a mode conversion accompanying the plasmon excitation, we get a little less than 6-digit resolution by efficiency-alone measurement of the reflected light; (2) We can achieve more than 8-digit resolution if we employ phase detection of the reflected light at the same time.
Result of experimental inspection: (3) We confirmed (1) mentioned above by an experiment; (4) If we employ a PEM (photoelastic modulator) and use homodyne detection, the phase detection can achieve the resolving power of (2) because the instrumental resolution in phase detection can be 0.1 degrees.
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