• 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
      Accés obert
      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
      Accés obert
    • 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
      Accés obert
    • Rotating acoustic drills by the interference of detuned vortices 

      Jimenez, Noe; González Mateo, Enrique; Camarena, Francisco; Staliunas, Kestutis (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      We present acoustic drill beams, structured sound beams exhibiting a dynamic intensity distribution that matches the shape of a helix. The intensity distribution rotates along the beam axis with controlled direction and ...
    • Sharp acoustic vortex focusing by Fresnel-spiral zone plates 

      Jimenez, Noe; Romero García, Vicenç; Garcia Raffi, Luis Miguel; Staliunas, Kestutis (2018-05-14)
      Article
      Accés obert
      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. ...