The objective of the PhD research project is to realise an array of quantum cascade (QC) nano-lasers by conceiving a photonic structure that merges concepts from microwave and optics. Indeed, concepts from the microwave range based on antenna theory could be implemented at much higher frequencies to spark new hybrid devices merging optics and electronics, dielectric and metals. Metallic antennae will be used to realise microcavities to enhance light-matter interaction and produce light emission. In particular patch-antennae will be adapted to produce an array of QC lasers that contribute to produce a coherent collective mode with substantially new performances in terms of wavelength engineering, spatial beam properties and low energy consumption. The properties of this photonic structure will be a mean to explore the quantum properties of the emitted light.