Title :
Free-standing tapered probe-tip for high resolution photoconductive terahertz field sampling
Author :
Wachter, M. ; Nagel, Michael ; Kurz, Heinrich
Author_Institution :
Inst. of Semicond. Electron., RWTH Aachen Univ., Aachen, Germany
Abstract :
We present a photoconductive probe-tip applicable for near- and far-field measurements in the terahertz frequency range. The probe-tip is based on a triangular patch of freestanding LT-GaAs of only 1.3 mum thickness with a pair of tapered metallic wires on top. Using non-resonant electric field enhancement at the tip of the probing device a spatial resolution of 5 mum and a bandwidth of 2 THz is demonstrated.
Keywords :
electric fields; photoconducting devices; terahertz wave imaging; free-standing tapered probe-tip; frequency 2 THz; high resolution photoconductive terahertz field sampling; nonresonant electric field enhancement; tapered metallic wires; terahertz frequency range; triangular patch; Electrodes; Frequency; Optical films; Optical scattering; Photoconducting devices; Photoconductivity; Sampling methods; Spatial resolution; Substrates; Wires;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves, 2009. IRMMW-THz 2009. 34th International Conference on
Conference_Location :
Busan
Print_ISBN :
978-1-4244-5416-7
Electronic_ISBN :
978-1-4244-5417-4
DOI :
10.1109/ICIMW.2009.5324971
