Strong quantum confinement effect in the optical properties of ultrathin α-In2Se3

Abstract

The effect of quantum confinement in the optical absorption spectra of atomically thin α-In2Se3 crystals is studied, observing a huge thickness-dependent shift in the optical band gap of exfoliated α-In2Se3 flakes. The band gap variation reported here is among the largest found in semiconductor crystals and spans a region of the near-UV spectrum uncovered by other 2D semiconductors.

3 Figures + 6 Supp. Info. figures

References in corpus (4)

• Two Dimensional Atomic Crystals
• Two-Dimensional Material Nanophotonics
• Atomically thin p-n junctions with van der Waals heterointerfaces
• Photovoltaic and photothermoelectric effect in a double-gated WSe2 device

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