Decoding ultrafast polarization responses in lead halide perovskites by the two-dimensional optical Kerr effect.

ABSTRACT: The ultrafast polarization response to incident light and ensuing exciton/carrier generation are essential to outstanding optoelectronic properties of lead halide perovskites (LHPs). A large number of mechanistic studies in the LHP field to date have focused on contributions to polarizability from organic cations and the highly polarizable inorganic lattice. For a comprehensive understanding of the ultrafast polarization response, we must additionally account for the nearly instantaneous hyperpolarizability response to the propagating light field itself. While light propagation is pivotal to optoelectronics and photonics, little is known about this in LHPs in the vicinity of the bandgap where stimulated emission, polariton condensation, superfluorescence, and photon recycling may take plac

SUBMITTER: Maehrlein SF 

PROVIDER: S-EPMC7896285 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature