Title :
High-efficiency terahertz sources based on plasmonic contact electrodes
Author_Institution :
Electr. Eng. Dept., Univ. of California Los Angeles, Los Angeles, CA, USA
Abstract :
Use of plasmonic contact electrodes in photoconductive terahertz sources offers significantly higher optical-to-terahertz conversion efficiencies and terahertz radiation powers by mitigating the inherent tradeoff between photoconductor quantum efficiency and ultrafast operation. We demonstrate that optical-to-terahertz conversion efficiencies as high as 7.5% and milliwatt-level terahertz radiation powers can be offered by plasmonic photoconductive terahertz sources in both continuous-wave and pulsed operation.
Keywords :
electrodes; photoconducting devices; plasmonics; terahertz wave generation; continuous-wave operation; milliwatt-level terahertz radiation powers; optical-to-terahertz conversion efficiencies; photoconductor quantum efficiency; plasmonic contact electrodes; plasmonic photoconductive terahertz sources; pulsed operation; ultrafast operation; Integrated optics; Optical amplifiers; Optical frequency conversion; Optical pumping; Optical variables measurement; Ultrafast optics; Terahertz source; nano-antennas; nanostructures; photoconductivity; plasmonics;
Conference_Titel :
Microwave Symposium (IMS), 2015 IEEE MTT-S International
Conference_Location :
Phoenix, AZ
DOI :
10.1109/MWSYM.2015.7167033
