基于表面等离激元磁共振的光场调控研究

Due to the unique property of extreme confinement of electromagnetic field on sub-wavelength scale, SPR provides us an exciting opportunity to manipulate light beyond the difraction limit. The amplitud, phase, polarization, and even the frequency of the light can be effectively modulated at the nanoscale when the coupling between the collective free electros oscillation and the incident light happens. This project is mainly committed to the exploration of SPR-induced magnetic resonance originating from plasmon-hybridization effects and its applications in the visible light region by both theoretical and experimental investigation. Femtosecond time-resolved transient absorption spectroscopy, plasmon-inhanced nonlinear spectroscopy, surface enhanced Raman scattering and KPFM based plasmonelectric Potentials measure will be adopted in the project. After the completion of the project, some original achievements, including both the basic physical principle of PIMR and the practical optical manipulation are expected to obtain. 6 to 8 research papers are expected to be published on international journals with high impact.

表面等离激元在亚波长尺度的高度能量局域化特征给我们提供了超越衍射极限进行光调控的可能。金属纳米结构与光相互作用时，入射光的振幅、位相、偏振、频率及相干特性可以有效调控并导致独特而新颖的远、近场光学特性。本项目主要致力于利用表面等离激元杂化理论，结合飞秒时间分辨瞬态吸收光谱、等离激元增强非线性光谱、表面等离激元电势等实验技术，探索可见光区的表面等离激元磁共振这一新型表面等离激元共振模式的光学激发及其光场调控特性。项目完成后，有望在新型光场调控、界面物理、表面等离激元光学中的基础科学问题及新型光电转换等领域取得原创性成果。本项目预计将在国际权威期刊上发表6至8篇高水平研究论文。

表面等离激元在亚波长光纳米尺度的的高度能量局域化特征给我们提供了超越衍射极限进行光调控的可能。金属纳米结构与光相互作用时，入射光的振幅、位相、偏振及相干特性可以有效调控并导致独特而新颖的远、近场光学特性。本项目主要围绕和利用表面等离激元杂化理论，结合飞秒时间分辨瞬态吸收光谱、等离激元增强非线性光谱、表面等离激元电势等实验技术，探究了可见光区的表面等离激元磁共振模式的光学激发及其光场调控特性，实现了基于等离激元共振模式光场调控的非线性以及瞬态超灵敏光学表征与应用研究。本项目对于等离激元磁共振模式在各类应用领域的推广奠定了较为重要的科学基础。迄今为之，本项目在新型光场调控、界面物理、表面等离激元光学中的基础科学问题等方面取得了部分重要的原创性成果。已在国际权威期刊上发表了10多篇高水平研究论文，并培养了多位光学专业的博士和硕士毕业生。