An integrated photonic structure and a method of fabrication includes a substrate having at least one opening disposed therein; a semiconductor stack disposed above the substrate, the semiconductor stack being, at least in part, isolated from the substrate by an opening to define a suspended semiconductor membrane; and a first doped region and a second doped region located within the suspended semiconductor membrane. The first doped region is laterally separated from the second doped region by an optically active region disposed therein that defines a waveguiding region of the integrated photonic structure.