Investigation of the role of the lateral photo-Dember effect in the generation of terahertz radiation using a metallic mask on a semiconductor.
Pulses of coherent terahertz radiation can be efficiently generated by a lateral diffusion current after ultrafast generation of photo-carriers near a metal interface on the surface of a semiconductor, this is known as the lateral photo-Dember effect. We investigate how the emission depends on the pump spot position, size, power and how it is affected by the application of an applied external bias. We study the role of the metallic mask and how it suppresses emission from the carriers diffusing under it due to a reduction of available radiation states both theoretically and experimentally.
School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, United Kingdom. M.Barnes@soton.ac.uk
M E
ME
Barnes
S A
SA
Berry
P
P
Gow
D
D
McBryde
G J
GJ
Daniell
H E
HE
Beere
D A
DA
Ritchie
V
V
Apostolopoulos
D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008029:Lighting / Q000295:instrumentation*; D008670:Metals / Q000737:chemistry*; D008962:Models, Theoretical; D012542:Scattering, Radiation; D012666:Semiconductors; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D055053:Terahertz Radiation
D008670:Metals