Title :
Longitudinal fields in focused terahertz beams
Author :
Winnerl, S. ; Hubrich, Ralf ; Mittendorff, M. ; Schneider, H. ; Helm, M.
Author_Institution :
Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Abstract :
We measure transverse as well as longitudinal terahertz field components in the focus of both radially and linearly polarized beams. A phase shift of π/2 between the transverse and longitudinal field contributions is found in both cases for all frequency components. Furthermore tighter focusing of the longitudinal components of the radially polarized beam as compared to the transverse components of the linearly polarized beam is demonstrated.
Keywords :
light polarisation; optical focusing; focused terahertz beams; linearly polarized beams; longitudinal terahertz field; optical focusing; radially polarized beams; transverse terahertz field; Abstracts; Apertures; Diffraction; Earth Observing System; Focusing; Lenses; Optimized production technology;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665517
