Polarized optical contrast spectroscopy of in plane anisotropic van der Waals materials.

ABSTRACT: Polarized optical contrast spectroscopy is a simple and non-destructive approach to characterize the crystalline anisotropy and orientation of two-dimensional materials. Here, we develop a 3D-printed motorized polarization module, which is compatible with typical microscope platforms and enables to perform broadband polarization-resolved reflectance spectroscopy. As proof of principle, we investigate the in-plane birefringence of exfoliated [Formula: see text]  thin films and few-layer [Formula: see text]  crystals. We compare the measured spectra to a model based on a transfer matrix formalism. Compared to other polarization sensitive approaches, such as Raman or second harmonic generation spectroscopy, optical contrast measurements require orders of magnitude less excitation power densit

SUBMITTER: Knockl E 

PROVIDER: S-EPMC12048637 | biostudies-literature | 2025 May

REPOSITORIES: biostudies-literature