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arXiv · 2605.20927

Spin-polarized lasing in a photonic lattice

A. Herrero Otermin·N. Carlon Zambon·A. Bieganowska·F. Jabeen·L. Viña·C. Antón-Solanas
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Abstract

We characterize spin-polarized lasing in a two-dimensional photonic lattice fabricated from a GaAs/InGaAs semiconductor microcavity sample. The lattice is defined by a staggered arrangement of rounded rectangular micrometric mesas that laterally confine and couple the optical modes. Polarization-, angle-, and energy-resolved micro-photoluminescence measurements reveal the transition from the strong-coupling regime to photon lasing, accompanied by extended spatial coherence across several lattice unit cells. Under circularly polarized nonresonant excitation, the emitted light acquires a controllable circular polarization whose handedness follows that of the pump. These results establish photonic-lattice VCSELs as a platform for spin-controlled coherent emission in extended optical systems.

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A. Herrero Otermin, N. Carlon Zambon, A. Bieganowska, F. Jabeen, L. Viña, C. Antón-Solanas. 2026-05-20. Spin-polarized lasing in a photonic lattice. https://arxiv.org/abs/2605.20927

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