微米透镜的成像改进方法及其机理研究

项目名称： 微米透镜的成像改进方法及其机理研究

项目编号： No.61475073

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： 叶永红

作者单位： 南京师范大学

项目金额： 80万元

中文摘要： 微米透镜(microscale lens)能将携带物体细节的倏逝波转变成可传输的波，从而实现超分辨成像。这种超分辨成像微米透镜在实时动态成像等领域具有重要的应用前景。为了将微米透镜推向实际应用，其成像放大率和对比度有待进一步提高，而且其超分辨成像机理有待进一步厘清。本项目拟通过研究目标物的频域分布特性、全反射效应等因素对微米透镜成像特性的影响，来探索倏逝波如何耦合进微米透镜中并转变成可传播的波，进而揭示微米透镜超分辨成像机理；我们拟在目标物表面或微米透镜的一侧沉积微纳金属结构，探索利用微纳金属结构中表面等离激元波效应、天线效应、散射效应等来实现倏逝波信号的传输及放大、近场光学信号的增强和图像放大，从而提高微米透镜的成像放大率和对比度。这些研究将有助于开发出实用的超分辨微米透镜。

中文关键词： 光学成像；超分辨

英文摘要： A microscale lens can convert the evanescent wave which contains the subwavelength details of an object to the propagating wave, which results in near-field magnification that is able to resolve features beyond the diffraction limit. Such a lens will provide new pathways in real-time bio-imaging. To push these microlenses into real applications, their magnification and contrast need to be further improved. In the proposal, we will study how the frequency components of the object and the total internal reflection effect affect the imaging properties of a microlens, study how the evanescent wave couples in the microscale lens and convert to the propagating wave, and find out the mechanisms in the microscale lens super-resolution imaging. We will deposit metallic nanostructures on top of the object or the microscale lens, explore the applications of the SPPs effect, the antenna effect, and scattering effect of the metallic nanostructures on the propagating and magnifying of the evanescent, the magnifying of the near-field signal and the object, and finally improve the contrast and magnification of the microscale lens. These studies will help the realization of practical super-resolution imaging microscale lenses.

英文关键词： optical imaging;super-resolution