Optical orientation and alignment of excitons in ensembles of inorganic perovskite nanocrystals

Abstract

We demonstrate the optical orientation and alignment of excitons in a two-dimensional layer of CsPbI${}_3$ perovskite nanocrystals prepared by colloidal synthesis and measure the anisotropic exchange splitting of exciton levels in the nanocrystals. From the experimental data at low temperature (2K), we obtain the average value of anisotropic splitting of bright exciton states of the order of 120μeV. Our calculations demonstrate that there is a significant contribution to the splitting due to the nanocrystal shape anisotropy for all inorganic perovskite nanocrystrals.

arXiv comment10 pages

References in corpus (3)

• Bright triplet excitons in lead halide perovskites
• Bright-exciton fine structures splittings in single perovskite nanocrystals
• Quantum-dot-based optical polarization conversion

Cited by in corpus (15)

• Coherent spin dynamics of electrons and holes in CsPbBr${}_3$ perovskite crystals
• Lattice distortion inducing exciton splitting and coherent quantum beating in CsPbI3 perovskite quantum dots
• The Landé factors of electrons and holes in lead halide perovskites: universal dependence on the band gap
• Giant Fine Structure Splitting of the Bright Exciton in a Bulk MAPbBr${}_3$ Single Crystal
• Quantum Interference in a Single Perovskite Nanocrystal
• Mode locking of hole spin coherences in CsPb(Cl,Br)${}_3$ perovskite nanocrystals
• Spectral fingerprint of quantum confinement in single CsPbBr${}_3$ nanocrystals
• Tailoring the electron and hole Landé factors in lead halide perovskite nanocrystals by quantum confinement and halide exchange
• Size-dependent lattice symmetry breaking determines the exciton fine structure of perovskite nanocrystals
• Giant optical orientation of exciton spins in lead halide perovskite crystals
• Theory of resonant Raman scattering due to spin-flips of resident charge carries and excitons in perovskite semiconductors
• Pairing of electro-magnetic bosons under spin-orbit coupling
• Confined acoustic phonons in CsPbI3 nanocrystals explored by resonant Raman scattering on excitons
• Quantum beats of exciton-polarons in CsPbI3 perovskite nanocrystals
• Size quantization of an exciton: A toy model of the "dead layer"