Planar photonic crystal microcavity has a conventional cavity structure which is used to enhance photoluminescence. However, the divergence angle of the emitted laser beam from a planar microcavity with a micrometer-thick defect layer is generally very large because the localization of light in one dimension can not totally suppress the modes in other directions, and the cavity quality factor Q of such devices is low (100) and determined thoroughly by the reflectivity of the distributed Bragg reflector (DBR). Recently, we proposed a new cavity structure which was a hybrid cavity combining a planar photonic crystal microcavity and a two-dimensional random cavity defect layer [1]. In the new developed microcavity structure, photons inside the hybrid cavity are trapped 3-dimensionally. Therefore, optical modes of the cavity were significantly reduced. Consequently, the laser threshold, divergence angle of emitted laser beam, and the spectral linewidth of the laser emission was substantially reduced by two-fold confinement effects from transverse random cavities and vertical planar microcavity.