Symmetry-breaking light–matter interactions in low-dimensional quantum materials
Overview
We investigate chiral excitonic states in layered 2D perovskites and their strong circularly polarized luminescence (CPL). By correlating structural chirality with optical selection rules, we reveal how exciton–phonon interactions and dielectric confinement shape polarization-resolved emission. We combine polarization-resolved photoluminescence, temperature-dependent spectroscopy, and device-level photocurrent measurements to connect chirality with functional optoelectronics. Our work establishes design principles for chiral perovskite heterostructures enabling spin–photon interfaces and polarization-encoded photonic devices.
Scientific Motivation Two-dimensional perovskites exhibit strong excitonic effects, large spin–orbit coupling, and flexible structural tunability. Introducing chirality into these systems enables access to novel optical selection rules and circularly polarized emission without external magnetic fields. Understanding how molecular chirality couples to excitonic states is essential for designing next-generation chiral photonic and optoelectronic devices.
