Journal
APPLIED PHYSICS LETTERS
Volume 90, Issue 9, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2711183
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The authors have developed a hybrid system for coherent raster-scan imaging at 0.6 THz. It combines a high-power electronic source (a multiplied Gunn emitter) with a femtosecond Ti:sapphire laser in order to achieve a high dynamic range via electro-optic detection. The single-scan dynamic range of 60 db at a lock-in time constant of 10 ms is sufficient to permit detection of scattered terahertz radiation in addition to specularly reflected/transmitted light. Active synchronization of the electronic source and the laser is not needed because of the remarkably low jitter between the two radiation sources.(c) 2007 American Institute of Physics.
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