Abstract
We demonstrate the idea of surface-assisted micro-structures to tailor the modes and resulting emission from a dynamical localized vertical cavity surface emitting laser at room temperature. With a slightly mismatch between the surface structure and the native oxide cavity layer, near field intensity images corresponding to the spontaneous emission patterns, whispering-gallery (WG) modes, dynamical localized (DL) modes, and unidirectional light emissions are measured and identified in experiments and simulations, respectively. Moreover, the coherent superposition of WG and DL modes, i.e. stable and unstable periodic orbits respectively, are reported to provide an alternative and general method to control lasing characteristics as well as to study quantum chaos in mesoscopic system. © 2009 Optical Society of America.