Chiral Exciton-Polariton Continuous-Wave Perovskite Laser.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41532196.
- Also identified by DOI 10.1002/adma.202515301.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Chiral optical materials offer a route to generate circularly polarized laser emission for spin-selective photonics, but realizing continuous-wave (CW) circularly polarized lasing at room temperature has remained challenging. Here, a chiral exciton-polariton CW laser is demonstrated using a microcavity strongly coupled with chiral 2D perovskite, (MBA)<sub>2</sub>PbI<sub>4</sub>. The resulting hybrid exciton-polaritons undergo lasing with ultralow threshold at an onset CW pump intensity of 0.5 W·cm<sup>-2</sup> at room temperature, orders of magnitude lower than all chiral halide perovskite lasers. The laser emission is intrinsically circularly polarized, with a luminescence dissymmetry factor (g<sub>lum</sub>) about 0.30. Spectral tunability of the lasing wavelength is further demonstrated by adjusting the cavity thickness. The chiral polariton laser exhibits excellent stability under continuous operation, maintaining >95% of its output intensity over hours of CW pumping. The device represents a versatile platform with potential for spin-optoelectronic applications and for exploring spin-polarized quantum fluids of light at room temperature.