Abstract

The physical properties of polycrystalline materials that are widely used in various optical applications are determined by their structure, wherein grain size and form and grain boundaries play a crucial role. Currently, there is no simple and fast method to generate a direct image of polycrystalline material structures. In this study, we propose a method for direct optical imaging of a crystalline material structure based on the difference between the optical properties of the grains and grain boundaries near the fundamental absorption edge of the material. Our results indicate the possible utility of the method in diverse imaging applications.

© 2018 Optical Society of America

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