Spatio-temporal control of photo-excited states in nanoparticle assemblies
Project/Area Number |
24350014
|
Research Category |
Grant-in-Aid for Scientific Research (B)
|
Allocation Type | Partial Multi-year Fund |
Section | 一般 |
Research Field |
Physical chemistry
|
Research Institution | Waseda University |
Principal Investigator |
Immure Kohei 早稲田大学, 理工学術院, 教授 (80342632)
|
Project Period (FY) |
2012-04-01 – 2016-03-31
|
Project Status |
Completed (Fiscal Year 2015)
|
Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2013: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2012: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
|
Keywords | 光励起状態 / ナノ粒子 / 時空間制御 / 波動関数 / 波形整形技術 / 近接場光学顕微鏡 / 金薄膜 / 光電場 |
Outline of Final Research Achievements |
Optical control of material functions is important for efficient energy use. In this project, we proposed to establish novel excitation schemes to control functions of nanomaterials. For this purpose, we developed an ultrafast nano-imaging method by combining ultrafast spectroscopy with a near-field optical microscope. By using this method, we visualized spatio-temporal dynamics of elementary excitations in gold nanostructures and found that spatial features of the excited states undergo ultrafast periodic oscillations. We also examined optical properties of gold nanoparticle assemblies, and found that unique optical properties are induced due to plasmon-plasmon interactions. The results indicate that optical properties of gold nanoparticle assembly can be controlled by the phase-modulation of excitation pulse and tuning of plasmon-plasmon interactions. The methods above can be extended to various nanosystems, and open up new route for optical control of material functions.
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Report
(5 results)
Research Products
(91 results)