### Generation of achromatic Bessel beams using a compensated spatial light modulator

Author(s): Jonathan Leach, Graham M. Gibson, Miles J. Padgett, Elric Esposito, Gail McConnell, Amanda J. Wright, and John M. Girkin

Abstract:

“We report the creation of white-light, achromatic Bessel beams using a spatial light modulator and a prism to compensate for the dispersion. Unlike the Bessel beam created by a refractive axicon, this achromatic beam has a radial wavevector and hence an intensity cross-section which is independent of wavelength. The technique also lends itself to the generation of higher order Bessel beams with an on-axis optical vortex and associated orbital angular momentum.”