Now showing items 1-5 of 5

  • Enhancement of sound by soft reflections in exponentially chirped crystals 

    Cebrecos, A.; Pico Vila, Rubén; Sánchez Morcillo, Victor José; Staliunas, Kestutis; Romero García, Vicenç; Garcia Raffi, Luis Miguel (2014-12-01)
    Article
    Open Access
    The enhancement of sound inside a two dimensional exponentially chirped crystal during the soft reflections of waves is experimentally and theoretically explored in this work. The control of this enhancement is achieved ...
  • Formation of high-order acoustic Bessel beams by spiral diffraction gratings 

    Jimenez, Noe; Pico Vila, Rubén; Sánchez Morcillo, Victor José; Romero García, Vicenç; Garcia Raffi, Luis Miguel; Staliunas, Kestutis (2016-11-23)
    Article
    Open Access
    The formation of high-order Bessel beams by a passive acoustic device consisting of an Archimedes' spiral diffraction grating is theoretically, numerically, and experimentally reported in this paper. These beams are ...
  • Nonlinear focusing of ultrasonic waves by an axisymmetric diffraction grating embedded in water 

    Jimenez, Noe; Romero García, Vicenç; Pico Vila, Rubén; Garcia Raffi, Luis Miguel; Staliunas, Kestutis (2015-11-16)
    Article
    Open Access
  • Nonlinear self-collimated sound beams in sonic crystals 

    Hamham, El Mokhtar; Jimenez, Noe; Pico Vila, Rubén; Sánchez Morcillo, Victor José; Garcia Raffi, Luis Miguel; Staliunas, Kestutis (2015-08-06)
    Article
    Open Access
  • Sharp acoustic vortex focusing by Fresnel-spiral zone plates 

    Jimenez, Noe; Romero García, Vicenç; Garcia Raffi, Luis Miguel; Staliunas, Kestutis (2018-05-14)
    Article
    Open Access
    We report the optimal focusing of acoustic vortex beams by using flat lenses based on a Fresnel- spiral diffraction grating. The flat lenses are designed by spiral-shaped Fresnel zone plates composed of one or several arms. ...