, Volume 93, Issue 2-3, pp 331-337
Date: 19 Aug 2008

Exciton–polariton formation at room temperature in a planar ZnO resonator structure

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Abstract

We show the dispersion of exciton–polaritons in an all oxide planar resonator structure. A quasi-bulk ZnO film acts as active medium and as cavity. The mirrors are made of Bragg reflectors consisting of ZrO2 and MgO layers. Despite a limited structural perfection, we have observed a giant energy splitting of the exciton–polariton branches of about 78 meV at maximum using reflectivity and photoluminescence measurements.