Optical spectroscopy techniques, including time-resolved and intensity-dependent photoluminescence, are employed here to optically demonstrate, for the first time, the presence of a buried two-dimensional hole gas (2DHG) in a nitride-based heterostructure. The characteristic spectral and temporal features of this recombination highlight the asymmetric electric field distribution on either side of the 2DHG. The effects of this electric field are discussed, particularly regarding their implications for optical recombination mechanisms within the heterostructure.