We investigate the ultraslow motion of polychromatic Bessel beams in unbounded, nondispersive media. Control over the group velocity is exercised by means of the angular dispersion of pulsed Bessel beams of invariant transverse spatial frequency, which spontaneously emerge from near-field generators. Temporal dynamics in transients and resonances over homogeneous delay lines (dielectric slabs) are also examined.
© 2008 Optical Society of America
Original Manuscript: March 7, 2008
Revised Manuscript: July 25, 2008
Manuscript Accepted: July 28, 2008
Published: October 16, 2008
Carlos J. Zapata-Rodríguez, Miguel A. Porras, and Juan J. Miret, "Free-space delay lines and resonances with ultraslow pulsed Bessel beams," J. Opt. Soc. Am. A 25, 2758-2763 (2008)