Optical characterization and selective addressing of the resonant modes of a micropillar cavity with a white light beam
||G. Ctistis, A. Hartsuiker, E. van der Pol, J. Claudon, W. L. Vos, and J.M. Gérard|
||Published November 29, 2010|
||Physical Review B|
||Ctistis 2010 Phys.Rev.B. Micropillar cavity.pdf (413 kB)|
We have performed white light reﬂectivity measurements on GaAs/AlAs micropillar cavities with diameters ranging from 1 μm up to 20 μm. We are able to resolve the spatial ﬁeld distribution of each cavity mode in real space by scanning a small-sized beam across the top facet of each micropillar. We spectrally resolve distinct transverse-optical cavity modes in reﬂectivity. Using this procedure we can selectively address a single mode in the multimode micropillar cavity. Calculations for the coupling efﬁciency of a small-diameter beam to each mode are in very good agreement with our reﬂectivity measurements.