Title :
Terahertz vector beams
Author :
Winnerl, S. ; Zimmermann, B. ; Peter, F. ; Schneider, H. ; Helm, M.
Author_Institution :
Forschungszentrum Dresden-Rossendorf, Dresden
Abstract :
We present a concept for the design of photoconductive antennas which allows the generation and detection of terahertz radiation pulses of freely selectable modes. We demonstrate the principle by showing electric field distributions for vector beams, namely the lowest order Gaussian-Bessel beams. They have a donut-like intensity distribution and either radial or azimuthal polarization. For comparison, Gaussian beams are investigated.
Keywords :
photoconducting devices; submillimetre wave antennas; submillimetre wave generation; Gaussian-Bessel beams; azimuthal polarization; donut-like intensity distribution; electric field distributions; photoconductive antenna design; radial polarization; terahertz radiation pulse detection; terahertz radiation pulse generation; terahertz vector beams; Electrodes; Electromagnetic propagation; Electromagnetic wave polarization; Gallium arsenide; Geometrical optics; Laser beams; Laser excitation; Metallization; Photoconductivity; Radiation detectors;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves, 2008. IRMMW-THz 2008. 33rd International Conference on
Conference_Location :
Pasadena, CA
Print_ISBN :
978-1-4244-2119-0
Electronic_ISBN :
978-1-4244-2120-6
DOI :
10.1109/ICIMW.2008.4665823
