Towards phoXonic crystals
Résumé
The simultaneous existence of photonic and phononic band gaps opens up many possibilities for enhancing acousto-optical interactions at a common wavelength scale. In this paper, we will give a brief review of the current state of the art dedicated to these structures, before focusing on theoretical investigations of the band diagrams of such 'phoxonic' crystals. We will more particularly focus on air/lithium niobate crystals in view of designing integrated phoxonic devices relying on surface acoustic waves. A comparison with a silicon based solution, in particular with slab structures, will also be drawn.