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arXiv · 2510.04679

Spin injection of exciton-polaritons with halide perovskites at room temperature

Elena Sendarrubias Arias-Camisón·Maksim Lednev·Jorge Cuadra·Raúl Gago·Luis Viña·Francisco José García Vidal·Johannes Feist·Ferry Prins·Carlos Antón Solanas
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Abstract

Exciton-polaritons, hybrid photon-exciton quasiparticles, constitute a useful platform for the study of light-matter interaction and nonlinear photonic applications. In this work, we realize a monolithic Tamm-plasmon microcavity embedding a thin film of two-dimensional halide perovskites with a tunable polymer spacer that controls the exciton-photon detuning. Angle-resolved optical spectroscopy at room temperature reveals the lower polariton branch dispersions in the linear regime for several detunings. Under circularly polarized, quasi-resonant laser excitation, the spin injection of excitons and their relaxation towards the lower polariton branch demonstrates its preservation. The observed spin-polarized emission is consistent with the fast decay of polaritons: spin relaxation mechanisms become inefficient during this short time. Our results provide promising insights into the spin control of polaritonic devices, including chiral lasers and switches.

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Elena Sendarrubias Arias-Camisón, Maksim Lednev, Jorge Cuadra, Raúl Gago, Luis Viña, Francisco José García Vidal, Johannes Feist, Ferry Prins, Carlos Antón Solanas. 2025-10-06. Spin injection of exciton-polaritons with halide perovskites at room temperature. https://doi.org/10.1002/adfm.202532019

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