"Frozen Waves" Research Papers - Academia.edu (original) (raw)
In this paper we present a theoretical method, together with its experimental confirmation, to obtain structures of light by connecting diffraction-resistant cylindrical beams of finite lengths and different radii. The resulting... more
In this paper we present a theoretical method, together with its experimental confirmation, to obtain structures of light by connecting diffraction-resistant cylindrical beams of finite lengths and different radii. The resulting ``Lego-beams'' can assume, on demand, various
interesting spatial configurations. We experimentally generate
some of them by using a computational holographic technique and a
Spatial Light Modulator. Our results can find applications in all
fields where structured light beams are needed, such as optical
tweezers, optical guiding of atoms, light orbital angular momentum
control and others. [OCIS codes: (999.9999) Non-diffracting waves; (260.1960) Diffraction theory; (070.7545) Wave propagation; (050.1120)
Apertures; (050.1755) Computational electromagnetic methods].
In recent times, we (theoretically and) experimentally realized quite an efficient modeling of the shape of diffraction-resistant optical beams, thus generating for the first time the so-called Frozen Waves (FW), whose longitudinal... more
In recent times, we (theoretically and) experimentally realized quite an efficient modeling of the shape of diffraction-resistant optical beams, thus generating for the first time the so-called Frozen Waves (FW), whose longitudinal intensity pattern can be arbitrarily chosen within a prefixed space interval of the propagation axis. In this Letter, we extend our theory of FWs, which led to beams endowed with a static envelope, through a dynamic modeling of the FWs whose shape is now allowed to slowly evolve in time in a predetermined way. Further, we experimentally create such dynamic FWs (DFWs) in Optics via a computational holographic technique and a spatial light modulator. Experimental results are presented here for two cases of DFWs, one of zeroth order and the other of higher order, the latter being the most interesting, since it exhibits a cylindrical surface of light whose geometry changes in space and time.