Title :
Use of plasmonic gratings for enhancing the quantum efficiency of photoconductive terahertz sources
Author :
Berry, C.W. ; Unlu, M. ; Hashemi, M.R. ; Jarrahi, M.
Author_Institution :
Electr. Eng. & Comput. Sci., Univ. of Michigan, Ann Arbor, MI, USA
Abstract :
Using plasmonic gratings, we have greatly increased the photo-absorbing active area of a photoconductive terahertz emitter, without sacrificing device ultrafast operation. More than 20 times radiation power enhancement was measured when compared to a similar emitter without plasmonic gratings.
Keywords :
diffraction gratings; photoconductivity; plasmonics; quantum optics; terahertz wave spectra; photo-absorbing active area; photoconductive terahertz emitter; photoconductive terahertz sources; plasmonic gratings; quantum efficiency; radiation power enhancement; Electrodes; Gratings; Optical device fabrication; Optical pumping; Plasmons; Stimulated emission; Ultrafast optics;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on
Conference_Location :
Wollongong, NSW
Print_ISBN :
978-1-4673-1598-2
Electronic_ISBN :
2162-2027
DOI :
10.1109/IRMMW-THz.2012.6380103
