Localized wave physics and engineering

Details Localized wave physics and engineering Localized wave physics and engineering

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrva..44.3960z&link_type=abstract

Physical Review A (ISSN 1050-2947), vol. 44, Sept. 15, 1991, p. 3960-3984.

Physics

28

Beams (Radiation), Pulsed Radiation, Space-Time Functions, Spatial Distribution, Wave Diffraction, Degrees Of Freedom, Far Fields, Near Fields, Radiation Sources, Wave Propagation

Scientific paper

The possibility of generating LW (localized wave) beams from an array with diffraction lengths or near-field distances much larger than anticipated from conventional CW theory is examined. This was done by investigating the physics and engineering of driving arrays with a spatially distributed set of broad-bandwidth pulses. Bounds are derived which refine the meaning of a diffraction length and a diffraction-limted beam especially for those excitations. It is shown that it is possible to design a set of driving signals for an array that can extend the near field further from an array with a more localized beam than is possible with a comparable CW system.

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