Certain embodiments of the invention may include systems, methods, and apparatus for generating terahertz electromagnetic radiation. According to an example embodiment of the invention, a method is provided for generating terahertz electromagnetic radiation. The method includes: coupling a terahertz resonator with an optical resonator, wherein the optical resonator comprises non-linear optical material; directing laser light through the optical resonator to generate terahertz radiation by parametric interaction of the laser light with the optical resonator and the terahertz resonator; and directing the terahertz radiation from the terahertz resonator to an output.