Photoconductive terahertz generation in nitrogen-doped single-crystal diamond
Pavel A. Chizhov, Maxim S. Komlenok, Vitali V. Kononenko, Vladimir V. Bukin, Alexander A. Ushakov, Vladislava V. Bulgakova, Andrey A. Khomich, Andrey P. Bolshakov, Vitaly I. Konov, Sergey V. Garnov
Abstract
The generation of terahertz radiation in a photoconductive emitter based on nitrogen-doped single-crystal diamond was realized for the first time. Under 400 nm femtosecond laser pumping, the performance of diamond antennas with different dopant levels was investigated and compared with a reference ZnSe antenna. Terahertz waveforms and corresponding spectra were measured. A low saturation level for high-nitrogen-containing diamond substrate was revealed. The results indicate the prospects of doped diamond as a material for high-efficiency large-aperture photoconductive antennas.