Publication date: 21st July 2025
Solution-processable semiconductors like halide perovskites and certain molecules are promising for next-generation spin-optoelectronic applications [1]. Yet, we don’t fully understand what governs spin and light polarization in these materials, and even less how these are affected by chirality [2].
In this talk, I will give an overview of our recent efforts to understand the spin-optoelectronic performance of these materials through time-, space- and polarization-resolved spectroscopy and microscopy.
For investigating halide perovskite films, we pushed broadband circular dichroism to diffraction-limited spatial and 15 fs time resolution for creating a spin cinematography technique to witness the ultrafast formation of spin domains due to local symmetry breaking and spin-momentum locking [3].
I will then briefly explain the fundamentals and artefacts involved in measuring circularly polarized luminescence reliably and introduce an open-access methodology and code to do so [4]. Finally, I will show our most recent development of a transient sensitive broadband full-Stokes spectroscopy with unprecedented time- and polarization resolution to track the emergence of chiral light emission [5].
[1] Nature Reviews Materials 8, 365 (2023).
[2] Nature Reviews Chemistry 9, 208 (2025).
[3] Nature Materials 22, 977 (2023).
[4] Advanced Materials 35, 2302279 (2023).
[5] Nature, https://doi.org/10.1038/s41586-025-09197-3 (2025).
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