Control of Light and Spin with Chiral Metal Halide Perovskite Semiconductors

Chiral metal halide perovskites have attracted growing attention as promising candidates for spin- and polarization-resolved optoelectronic devices, thanks to their unique properties such as circular dichroism, circularly polarized photoluminescence, and chirality-induced spin selectivity. Despite their considerable potential for tunable spin and chiral light control, the underlying physical mechanisms remain elusive. In this presentation, I will introduce our recent studies on chirality-induced anisotropic absorption of spin currents in these materials. Through ferromagnetic resonance and time-resolved magneto-optical Kerr effect, we have identified strong anisotropic damping of magnetization precession in both chiral and racemic perovskites. Additionally, I will discuss how strategic manipulation of composition, dopants, and crystal orientation enables us to control the chiroptical activity of these perovskites, specifically targeting the circularly polarized absorption and emission.