Characterization of graphene layers using super resolution polarization parameter indirect microscopic imaging

Abstract

We report on the development of super-resolution polarization (parameter) indirect microscopic imaging (PIMI) and its application to visualizing and quantifying graphene layer's morphological and structural features. The PIMI system was built by modifying a conventional optical microscopy such that the variation of the polarization status of incident light can be precisely controlled, imaging was subsequently acquired by analyzing the dependence of the optical intensity transmitted through (or reflected from) the samples on the incident light polarization status. Measurements on the thickness as well as other structural features of graphene samples which had been prepared by different methods were performed. The results which were highly consistent to those measured by Raman spectroscopy indicate that the PIMI system is capable of characterizing graphene's dimensional and structural features with super resolution.