A cascaded difference frequency generation method combined with cavity phase matching and quasi phase matching for high-efficiency terahertz generation

Abstract

Abstract A cascaded difference frequency generation (DFG) method for high-efficiency terahertz generation is presented, which is combined with cavity phase matching and quasi phase matching. The results show that a ten-orders cascade effect can be approximately satisfied, with a peak photon conversion efficiency of 447.6%, which exceeds the Manley-Rowe limit. This method is expected to contribute to improving the conversion efficiency of DFG for terahertz generation.