Researchers at the Daegu Gyeongbuk Institute of Science and Technology (DGIST) have experimentally demonstrated control over polariton Rabi oscillations through ferroelectricity induced by crystallographic phase transitions in a perovskite semiconductor (MAPbBr₃). The work, published in Advanced Science, shows that quantum particle states can be modified without external fields, offering a new method for controlling quantum information carriers using intrinsic material properties.
The team constructed a microcavity incorporating the perovskite material and showed that phase transition–driven changes in crystal structure led to up to 20% modulation in Rabi oscillation frequency and up to 44% variation in oscillator strength. These effects were attributed to spontaneous polarization (ferroelectricity) arising from structural asymmetry, which alters excitonic properties and thus the coupled polariton behavior. The approach enables dynamic, device-level control of polariton-based quantum systems without relying on bulky or power-intensive components.
This ferroelectric control method could be useful in designing tunable quantum light sources and practical quantum photonic devices. The research was led by Professor Chang-Hee Cho and supported by the Samsung Science and Technology Foundation.
Read the full announcement from Asia Research News here and the publication in Advanced Science here.
April 10, 2025
