EFFICIENT TERAHERTZ SOURCES BY OPTICAL RECTIFICATION IN PHOTONIC CRYSTALS AND METAMATERIALS EXPLOITING TAILORED TRANSVERSE DISPERSION RELATIONS

摘要

A system and a method for generating terahertz (THz) radiation are provided. The system includes a photonic crystal structure comprising at least one nonlinear material that enables optical rectification. The photonic crystal structure is configured to have the suitable transverse dispersion relations and enhanced density photonic states so as to allow THz radiation to be emitted efficiently when an optical or near infrared pulse travels through the nonlinear part of the photonic crystal.