数字双光子干涉、聚焦及其应用

项目名称： 数字双光子干涉、聚焦及其应用

项目编号： No.61475077

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 张国权

作者单位： 南开大学

项目金额： 80万元

中文摘要： 光的相干性和光与物质的相互作用是光学领域的两大重要基本问题，然而在很大程度上这两个基本问题是分别独立地被研究。事实上，从光与物质相互作用的量子理论来看，光场的高阶相干性将直接影响光与物质的非线性相互作用。在本项目中，我们将首先研究光场的相位扰动对于激光等经典光场的高阶相干性的调控作用，以实现突破传统光学衍射极限的多光子干涉和双光子聚焦效应；并借鉴数字全息技术的相关概念和方法，利用空间光调制器和电光调制器实现对多光子干涉和双光子聚焦效应的数字化调控；进一步研究双光子聚焦效应对光与物质相互作用的影响，探索实现光与物质非线性相互作用增强的新途径。这些结果不仅对深入认识光的相干性和光与物质相互作用具有重要的基础理论意义，而且在超高空间分辨微细加工、精密测量以及高灵敏度探测等方面具有重要的实际应用价值。

中文关键词： 双光子；干涉；聚焦；超高分辨；数字

英文摘要： Optical coherence and light-matter interaction are two important basic issues in optics, and usually they are studied almost independently in the literature. In fact, the optical field correlation function plays an important role in the nonlinear interaction of light with matter in the quantum theory of light-matter interaction. In this project, we will first study the effect of phase fluctuation of classical light such as laser on its optical field correlation function, and then try to realize the multi-photon interference and two-photon focusing effect with a spatial resolution surpassing the classical diffraction limit determined by the Rayleigh criterion. Based on these results and refering to the concepts and principles of digital holography, we will develop the way to control digitally the multi-photon interference and two-photon focusing through spatial light modulator and electro-optic modulator. Further more, we will study the effect of two-photon focusing of optical field on the light-matter interaction, which may lead to novel mechanism to enhance the nonlinear interaction of light with matter. These results may provide deep insights on the optical coherence of light and the light-matter interaction, and have important potential practical applications such as micro-fabrication with super-high spatial resolution, precision measurement and high sensitive optical probing.

英文关键词： two-photon;interference;focusing;superhigh resolution;digital