Opto-electronic properties of alpha-In2Se3: single-layer to bulk

In this work, we report linear and non-linear spectroscopic measurements of chemically-grown layered (from one to 37 quintuple layers) and bulk alpha-In2Se3 samples over a photon energy range of 1.0–4 eV, and compare with ab initio density functional theory calculations, including bandstructures and G0W0 calculations.