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High-Q planar organic-inorganic Perovskite-based microcavity

Zheng Han, Hai-Son Nguyen, Fabien Boitier, Yi Wei, Katia Abdel-Baki, Jean-Sébastien Lauret, Jacqueline Bloch, Sophie Bouchoule and Emmanuelle Deleporte, Optic Letters 37, 5061 (2012)

We report on the fabrication of a perovskite-based ((C6H5C2H4 NH3)2PbI4) planar microcavity with a technique of top dielectric mirror's migration in liquid, avoiding the degradation of the perovskite material.This approach allows for increasing the cavity Q-factor, without degrading the fragile molecular material. Strong coupling of the perovskite exciton to both the cavity mode and the first Bragg mode is evidenced from angle-resolved reflectivity and micro-photoluminescence measurements at room temperature, an efficient relaxation towards the minimum of the main polariton branch is observed. The measured quality factor is significantly increased compared to previous reports where a top metallic mirror was used, showing the decisive advantage of the present fabrication technique toward the achievement of stimulated effects and polaritonlasing with perovskite materials.

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