Optical control of polarization in 2D metal halide perovskites
Lina Quan a
a The University of North Carolina at Chapel Hill, United States
Proceedings of MATSUS Fall 2026 Conference (MATSUSFall26)
A6 Halide Perovskites Beyond the Ideal Crystal: Chemistry, Interfaces, and Functional Heterostructures
Palma, Spain, 2026 October 26th - 30th
Organizers: Ahmed Abdelhady and Anna Moliterni
Invited Speaker, Lina Quan, presentation 483
Publication date: 22nd July 2026

Organic–inorganic hybrid perovskites exhibit a rich interplay between their organic and inorganic components, giving rise to highly tunable electronic, optical, and structural properties. Central to their functionality is not only their static crystal structure, but also the dynamic and heterogeneous structural degrees of freedom that enable collective optical responses. Designing and controlling these structural characteristics and molecular motions therefore provides new opportunities to manipulate light–matter interactions.

In this talk, I will present our strategies for utilizing these structural degrees of freedom to control symmetry breaking, optical anisotropy, and light polarization in two-dimensional metal halide perovskites and related hybrid materials. I will first discuss our recent observation and optical control of hidden polar states in metal halide perovskites, providing a pathway toward non-invasive control of ferroic responses. I will then highlight how lattice heterogeneity in stacked 2D perovskite single crystals can produce broadband optical retardation and enable control over light polarization.

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