| 研究課題/領域番号 |
26289013
|
|---|
| 研究機関 | 東京大学 |
|---|
研究代表者 |
J・J Delaunay 東京大学, 工学(系)研究科(研究院), 准教授 (80376516)
|
|---|
| 研究分担者 |
三田 吉郎 東京大学, 工学(系)研究科(研究院), 准教授 (40323472)
|
|---|
| 研究期間 (年度) |
2014-04-01 – 2017-03-31
|
| キーワード | ナノマイクロ加工 / メタマテラル・表面プラズモン |
|---|
| 研究実績の概要 |
We design and fabricate a miniaturized infrared spectrometric image-array-sensor using a new plasmonic nanostructure. The miniaturized image-array-sensor is used in biological research and medical diagnosis, particularly in endoscopy to discriminate between normal and diseased tissues. The new plasmonic nanostructure consists of periodic high-aspect-ratio semiconducting walls sandwiched between metallic layers. This structure sustains sharp, strong and controllable resonances that realize both dispersion and detection of infrared light, thus is amenable to miniaturization. We will characterize the proposed plasmonic structures for: 1) absorption resonance sharpness and strength, 2) Control of the resonance wavelength, and 3) Thermal detection responsivity.
|
| 現在までの達成度 (区分) |
現在までの達成度 (区分)
1: 当初の計画以上に進展している
理由
We have designed, fabricated and characterized a plasmonic photocapacitor. The results were summarized and submitted in a leading journal NANOLETTERS (IF=13). Prof Halas, the leading researcher in the field of plasmonics, served as the editor for the referee process, and our manuscript was very recently accepted. Publication in NANOLETTERS is a remarkable achievement. The spectral selectivity and sensitivity of the photocapacitor were demonstrated for the visible and near infrared range. In the infrared region, the sensitivity is still low, but was characterized. Detection technique should be improved and the useful range of wavelengths should be extended to larger wavelengths.
|
| 今後の研究の推進方策 |
In the third year, effort will be made to improve the detection technique using a technique based on a resonant RLC circuit in combination with a lock-in amplification. This should improve the detection limit of the plasmonic photocapacitor. Also, the useful rage of wavelengths should be extended to larger wavelengths. This point is difficult as it involves a change in the material of the photocapacitor, so that the complete fabrication process needs to be optimized for the new materials.
|
| 次年度使用額が生じた理由 |
Part of travel expenses was not requested to save money. Electrical characterization was done using a borrowed equipment.
|
| 次年度使用額の使用計画 |
In the final year of the project, the fund will be used to cover the sample fabrication cost at the Takeda center, to maintain our simulation tools, to improve the optical setup and to build an electrical setup. Particularly, we need to improve our optical setup and buy a new CCD detector for our spectrometer.
|
