Exploració per autor "Garcia Raffi, Luis Miguel"

Ara es mostren els items 1-5 de 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
      Accés obert
      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
      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

    • 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. ...