Bessel-Bessel Laser Bullets

Bessel beams carry orbital angular momentum (OAM). Opening up of the Hilbert space of OAM to information coding makes Bessel beams potential candidates for utility in data transfer and optical communications. The ultra-short and tightly-focused analogue of a non-diffracting and non-dispersing laser Bessel beam is often referred to as a laser bullet. Electromagnetic fields of a laser Bessel-Bessel bullet are presented, following from solution to the wave equations of the scalar and vector potentials in the presence of an under-dense plasma. Intensity distributions based on the derived fields are shown to propagate over many centimeters, without significant diffraction or distortion. The reported fields are derived, to lowest order, from a vector potential containing an ordinary Bessel function of arbitrary order and a zero-order spherical Bessel function, hence the designation Bessel-Bessel bullet.