Stimulated Emission of Terahertz Radiation from Electro-optic Dendrimer

摘要

Dendrimers are a polymeric nanomaterial whose molecular size varies from ~4 nm to -13 nm based on its generation; within a generation these molecules are highly monodispersed. As the molecular size increases, its number of end groups increase too, resulting in an increased number of available sites for attaching foreign molecules. Generation 3 dendrimer was doped with a commercially available chromophore and formed thin film via spin coating. The cured dendrimer was corona poled. The resulting stand alone film exhibits an electro-optic coefficient γ~33 ~130 pm/V leading to a high x~（(2）)-dendrimer. This EO dendrimer was used for terahertz generation via difference-frequency technique (DFG). Two CW diode lasers were used to pump the EO dendrimer emitter to provide a combined pump power of 5.5W that generated a continuous wave DFG power of～3.4 mW.