Title :
Millimetre-wave Bessel beams using computer holograms
Author :
Salo, J. ; Meltaus, Johanna ; Noponen, E. ; Westerholm, J. ; Salomaa, M.M. ; Lönnqvist, A. ; Säily, J. ; Häkli, J. ; Ala-Laurinaho, J. ; Raisanen, Antti V.
Author_Institution :
Lab. of Mater. Phys., Helsinki Univ. of Technol., Espoo, Finland
fDate :
6/21/2001 12:00:00 AM
Abstract :
A computer-generated binary amplitude hologram is used to transform an initial Gaussian electromagnetic field with spherical phase front at 310 GHz into a nondiffracting Bessel beam. The beam profile is measured with the help of a near field scanner. In contrast to the situation in the optical region, both amplitude and phase information is readily obtainable from the generated field
Keywords :
Bessel functions; computer-generated holography; millimetre wave imaging; 310 GHz; Gaussian electromagnetic field; computer-generated binary amplitude hologram; near-field scanner; nondiffracting millimetre-wave Bessel beam; spherical phase front;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010551
