Résumé:

In this work, we study the spectroscopy of two types of nanocavities. The first one consists of Al(Ga)N microdisk resonators embedding GaN QDs. We have observed and modelled their optical modes, called whispering gallery modes, with promising quality factors from 1000 to 7000 (Optics Letters, vol. 36 p.2203 - 2011). The second type of nanocavities is photonic crystals obtained by small modifications of a W1 waveguide in an AlN photonic crystal membrane containing QDs. The room temperature photoluminescence of the embedded quantum dots reveals the existence of even-symmetry and odd-symmetry confined cavity modes and guided modes. Cavity mode quality factors up to 4400 at 395nm and 2300 at 358nm are obtained (APL, 100 p.191104 - 2012). These results will be compared to state of the art nitride microdisks and photonic crystal cavities.