Giant optical anisotropy in transition metal dichalcogenides for next-generation photonics.

ABSTRACT: Large optical anisotropy observed in a broad spectral range is of paramount importance for efficient light manipulation in countless devices. Although a giant anisotropy has been recently observed in the mid-infrared wavelength range, for visible and near-infrared spectral intervals, the problem remains acute with the highest reported birefringence values of 0.8 in BaTiS₃ and h-BN crystals. This issue inspired an intensive search for giant optical anisotropy among natural and artificial materials. Here, we demonstrate that layered transition metal dichalcogenides (TMDCs) provide an answer to this quest owing to their fundamental differences between intralayer strong covalent bonding and weak interlayer van der Waals interaction. To do this, we made correlative far- and near-fiel

SUBMITTER: Ermolaev GA 

PROVIDER: S-EPMC7870936 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature