物理学报2016，Vol.65Issue(23)：233601-1-233601-5,5.DOI:10.7498/aps.65.233601
基于环形抽运光的红外超分辨显微成像方法∗
A sup er-resolution infrared microscopy based on a doughnut pump b eam
摘要
Abstract
An approach to breaking through the diffraction limitation in infrared microscopies is put forward in this paper. In this method, instead of Gaussian pump beam, an intensive vortex beam is first focused on the sample, leading to the saturation absorption of peripheral molecules in the point spread function (PSF). The vortex beam is followed by a Gaussian probe beam with the same wavelength. Because of the previous saturation absorption, the probe beam can only be absorbed by the molecules near the center, resulting in a shrunk PSF which means super-resolution. Furthermore, the PSF of a system based on this approach is numerically simulated. With a 100 nJ pulse energy vortex beam and a 0.1 nJ pulse energy probe beam, the theoretical resolution FWHM (full width at half maximum) is measured to be about 236 nm which is 14 times better than that of the traditional infrared microscopy.关键词
红外吸收/超分辨成像/衍射极限/锁相放大器Key words
infrared absorption/super-resolution microscopy/diffraction limit/lock-in amplifier引用本文复制引用
刘鸿吉,刘双龙,牛憨笨,陈丹妮,刘伟..基于环形抽运光的红外超分辨显微成像方法∗[J].物理学报,2016,65(23):233601-1-233601-5,5.基金项目
国家重点基础研究发展计划(批准号:2012CB825802,2015CB352005)、国家自然科学基金(批准号:61335001,61235012)、国家重大科学仪器设备开发专项(批准号:2012YQ15009203)和深圳市科技计划(批准号：JCY20160308104404452)资助的课题 （批准号:2012CB825802,2015CB352005）
