Title :
Design and characterization of traveling-wave electrooptic terahertz sensors
Author :
Wu, Qi ; Zhang, Xi-Cheng
Author_Institution :
Dept. of Phys., Rensselaer Polytech. Inst., Troy, NY, USA
fDate :
9/1/1996 12:00:00 AM
Abstract :
We discuss the design considerations of traveling-wave electrooptic terahertz sensors, wherein we analyze limitations in frequency response due to velocity-mismatch in the sensor crystal. In zincblende electrooptic materials, optical group velocities are found to be able to match the phase velocity of low frequency terahertz wave at specific optical center frequencies. We observed excellent velocity-matching in ZnTe crystals within the tuning range of Ti:sapphire lasers. Terahertz pulses as short as 200 fs (full-width-at-half-maximum) have been measured using the ultra-broad-band radiation generated via terahertz optical rectification
Keywords :
electro-optical devices; frequency response; optical sensors; sensitivity; submillimetre wave detectors; submillimetre wave measurement; 200 fs; Terahertz pulses; ZnTe; ZnTe crystals; frequency response; low frequency terahertz wave; optical group velocities; phase velocity; sensor crystal; terahertz optical rectification; traveling-wave electrooptic terahertz sensors; velocity-mismatch; zincblende electrooptic materials; Crystalline materials; Electrooptic devices; Frequency response; Laser tuning; Nonlinear optics; Optical materials; Optical pulse generation; Optical sensors; Pulse measurements; Sensor phenomena and characterization;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/2944.571769
