Strongly coupled exciton-polariton systems enable the miniaturization and integration of photonic circuits. They represent, for instance, ideal building blocks for the fabrication of low-threshold micrometer-size lasers. In this work, we demonstrate the achievement of an electrically controlled laser in strongly coupled exciton-polariton GaAs/AlGaAs planar waveguides. We introduce an additional degree of freedom in the lasing frequency by applying an electric field through the heterostructure, which allows to switch in real time between different Fabry-Pérot modes. Our system enables the realization of multiple micrometer-size electrically controllable lasers, thus making it suitable for the construction of polaritonic optical circuits and coherent light sources.
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