Optically pumped on-chip solid-state laser

An optically pumped on-chip solid-state laser, comprising:

• a solid gain media substrate;
• and
• a laser generating structure disposed above the solid gain media substrate;
• wherein:
• the laser generating structure comprises a resonator, a pump light input structure, and a laser light output structure;
• the resonator is disposed between the pump light input structure and the laser light output structure, and is propped against or is in clearance fit with the solid gain media substrate;
• and
• the resonator is a dielectric resonator comprising a dielectric material different from a material of the solid gain media substrate, and the dielectric material has a refractive index higher than that of the solid gain media substrate;
• the resonator has a mode field that overlaps with the solid gain media substrate;
• pump light is input by the pump light input structure into the resonator from outside, and the pump light in the resonator has a first optical field distribution that overlaps with the solid gain media substrate to form an overlap region, so that the solid gain media substrate is excited in the overlap region to form a population inversion region;
• and a lasing mode in the resonator has a second optical field distribution that overlaps with the population inversion region in the solid gain media substrate, resulting in gain, and when the gain is greater than loss, laser light is generated and output by the laser light output structure.