Nanoprobes for nano-femto optics

智力优点：本研究的目的是发展一种非线性奈米探针，以进行超快光学近场的奈米-毫微微尺度的时空表征。所提出的纳米探针由连接到纳米线的非线性纳米颗粒组成，纳米线又连接到二氧化硅纤维锥。纳米颗粒的非线性使得能够通过自相关或频率分辨的光学选通测量进行时间表征，同时通过非线性纳米颗粒的近场扫描实现纳米级空间分辨率。我们将开发双光子荧光和二次谐波纳米探针，开发和优化基于纳米探针的时空表征技术，并研究所提出的基于纳米探针的方法的精度。随着所提出的非线性纳米探针的独特功能，我们还计划研究它们的应用，探测几个有趣的超快光学nearfields.Broad影响：所提出的纳米探针可以显着推进纳米超快技术的艺术状态，这反过来又可以创造深远的影响，在许多科学学科中，他们发挥了核心作用。非线性纳米探针具有独特的纳米-毫微微尺度的时空映射能力，具有重要的应用前景。关于光-物质相互作用在超快制度，超快动力学的复杂纳米结构，和非线性光学在纳米等离子体结构的基本问题，都可以受益于拟议的纳米探针的发展。因此，拟议的研究可能会对非线性光学显微镜和纳米光子学等领域产生相当大的影响。拟议的研究是高度跨学科的，也可以为学生提供良好的教育机会。

Intellectual merit: The goal of the proposed research is to develop a nonlinear nanoprobe for nano-femto scale spatiotemporal characterization of ultrafast optical near fields. The proposed nanoprobe consists of a nonlinear nanoparticle attached to a nanowire, which is in turn attached to a silica fiber taper. The nonlinearity of the nanoparticle enables temporal characterization through autocorrelation or frequency resolved optical gating measurements while the nanoscale spatial resolution is achieved through near field scanning of the nonlinear nanoparticle. We will develop two-photon fluorescent and second harmonic nanoprobes, develop and optimize nanoprobe based spatiotemporal characterization technique, and investigate the precision of the proposed nanoprobe based method. With the unique capabilities of the proposed nonlinear nanoprobes, we also plan to investigate their applications to probing several interesting ultrafast optical near fields.Broad impact: The proposed nanoprobe can significantly advance the state of the art of nano & ultrafast technology, which can in turn create far-reaching impacts in many scientific disciplines in which they play a central role. With its unique capability in providing nano-femto scale spatiotemporal mappings, the proposed nonlinear nanoprobe can find many important applications. Fundamental questions with regard to light-matter interaction in the ultrafast regime, ultrafast dynamics of complex nanostructures, and nonlinear optics in nanoscale plasmonic structures, can all benefit from the development of the proposed nanoprobe. As a result, the proposed research can have considerable impact on areas such as nonlinear optical microscopy and nanophotonics. The proposed research is highly interdisciplinary and can also provide excellent education opportunities for students.