Far-field measurements of the in-plane polarization properties of spontaneous emission from optical nanocavities formed in two-dimensional photonic crystal slab waveguides are presented. A strong polarization signature, even subthreshold, is found for a pair of highly localized dipolelike resonant modes. This polarization signature is used to study the effects of symmetry lowering within the cavity.
© 2002 Optical Society of America
Oskar Painter and Kartik Srinivasan, "Polarization properties of dipolelike defect modes in photonic crystal nanocavities," Opt. Lett. 27, 339-341 (2002)