基于光整流的亚波长太赫兹成像

Sub-wavelength terahertz imaging through optical rectification.

作者信息

Sanjuan Federico, Gaborit Gwenaël, Coutaz Jean-Louis

机构信息

IMEP-LAHC, UMR CNRS 5130, University Savoie Mont-Blanc, 73376 Le Bourget du Lac Cedex, France.

Kapteos, 354 voie Magellan, 73800 Sainte-Hélène du Lac, France.

出版信息

Sci Rep. 2018 Sep 10;8(1):13492. doi: 10.1038/s41598-018-31970-w.

DOI:10.1038/s41598-018-31970-w

PMID:30202106

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6131247/

Abstract

We record a sub-wavelength terahertz image of a caster sugar grain thanks to optical rectification in the sample excited with a femtosecond laser beam. The lateral spatial resolution of this technique is given by the laser spot size at the sample and here its measured value is 50 μm, i.e. ~λ/12. We give an estimation of the ultimate resolution that could be achieved with this method.

摘要

借助飞秒激光束激发样品中的光学整流效应，我们记录了一粒caster糖的亚波长太赫兹图像。该技术的横向空间分辨率由样品处的激光光斑尺寸决定，此处其测量值为50μm，即约为λ/12。我们对用该方法可实现的极限分辨率进行了估计。