基于非线性光学突破衍射极限的基础研究

项目名称： 基于非线性光学突破衍射极限的基础研究

项目编号： No.11304201

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 万文杰

作者单位： 上海交通大学

项目金额： 25万元

中文摘要： 光学衍射极限直接决定了光学系统中的最小分辨率。光学衍射极限制约了光学系统在生物成像、光学信息储存、微材料加工等众多领域中的应用效果。如何有效地突破衍射极限是各方的研究的重点。本项目将引入非线性光学的概念，研究通过近场由光学非线性产生多波混频，在远场进行调控来控制光学近场的渐逝波，同时在远场测量亚波长信息元的信号，达到突破衍射极限的目的，并探讨其潜在的应用。

中文关键词： 四波混频；负折射；超分辨成像；衍射极限；

英文摘要： Diffraction limit is the fundamental limit in optics, determining the smallest feature size observed in optical system. This limit constrains optical systems' applications in a broad way, such as in microscope, optical disc and optical fabrication. Breaking the diffraction limit has attracted research interests from various fields. In this proposal, we aim to bring in the idea using nonlinear optics to break this diffraction limit set by the linear optics. By utilizing nonlinear wave mixing and harmonic generations of wave in the near-field, we could possibly extract the near-field evanescent wave to the far-field. In such manner, we could manage to control light in the near-field from far-field, at the same time, observe the near-field signal from far-field, breaking the diffraction limit.

英文关键词： four wave mixing；negative refraction；super-resolution；diffraction limit；