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High-performance photoconductive terahertz sources based on nanoscale contact electrode gratings
- Source :
- 2012 IEEE/MTT-S International Microwave Symposium Digest.
- Publication Year :
- 2012
- Publisher :
- IEEE, 2012.
-
Abstract
- A photoconductive terahertz emitter based on nanoscale contact electrode gratings is presented and experimentally demonstrated. The nanoscale grating enables ultrafast and high quantum efficiency device operation simultaneously, by reducing the photo-generated carrier transport path to photoconductor contact electrodes. The presented photoconductor eliminates the need for a short-carrier lifetime semiconductor, which limits the efficiency of conventional photoconductive terahertz emitters. A photoconductive terahertz emitter based on the presented scheme is implemented and integrated with 0.5 THz dipole antenna arrays. Emitted radiation is characterized in a terahertz time-domain spectroscopy setup, measuring a full width at half maximum response time of 670 fs.
Details
- Database :
- OpenAIRE
- Journal :
- 2012 IEEE/MTT-S International Microwave Symposium Digest
- Accession number :
- edsair.doi.dedup.....d0fd3d83161d31c6a51c49ebaae77a9e