We present a detailed experimental characterization of the spectral and spatial structure of the confined optical modes for oxide-apertured micropillar cavities, showing good-quality Hermite–Gaussian profiles, easily mode-matched to external fields. We further derive a relation between the frequency splitting of the transverse modes and the expected Purcell factor. Finally, we describe a technique to retrieve the profile of the confining refractive index distribution from the spatial profiles of the modes.
© 2012 Optical Society of America
Original Manuscript: September 6, 2012
Revised Manuscript: October 10, 2012
Manuscript Accepted: October 10, 2012
Published: November 8, 2012
Cristian Bonato, Jan Gudat, Keesjan de Vries, Susanna M. Thon, Hyochul Kim, Pierre M. Petroff, Martin P. van Exter, and Dirk Bouwmeester, "Optical modes in oxide-apertured micropillar cavities," Opt. Lett. 37, 4678-4680 (2012)