Now showing items 1-8 of 8

    • Direction-sensitive transverse velocity measurement by phase-modulated structured light beams 

      Rosales Guzmán, Carmelo; Hermosa, Nathaniel; Belmonte Molina, Aniceto; Pérez Torres, Juan (2014-09-15)
      Article
      Restricted access - publisher's policy
      The use of structured light beams to detect the velocity of targets moving perpendicularly to the beam's propagation axis opens new avenues for remote sensing of moving objects. However, determining the direction of motion ...
    • Experimental detection of transverse particle movement with structured light 

      Rosales Guzmán, Carmelo; Hermosa, Nathaniel; Belmonte Molina, Aniceto; Pérez Torres, Juan (MACMILLAN PUBLISHERS LIMITED, 2013-10-02)
      Article
      Open Access
      One procedure widely used to detect the velocity of a moving object is by using the Doppler effect. This is the perceived change in frequency of a wave caused by the relative motion between the emitter and the detector, ...
    • Frequency conversion of structured light 

      Steinlechner, Fabian; Hermosa, Nathaniel; Pruneri, Valerio; Pérez Torres, Juan (Macmillan Publishers, 2016-02-15)
      Article
      Open Access
      Coherent frequency conversion of structured light, i.e. the ability to manipulate the carrier frequency of a wave front without distorting its spatial phase and intensity profile, provides the opportunity for numerous novel ...
    • Measuring the translational and rotational velocities of particles in helical motion using structured light 

      Rosales Guzmán, Carmelo; Hermosa, Nathaniel; Belmonte Molina, Aniceto; Pérez Torres, Juan (2014-08-07)
      Article
      Open Access
      We measure the rotational and translational velocity components of particles moving in helical motion under a Laguerre-Gaussian mode illumination. The moving particle reflects light that acquires an additional frequency ...
    • Measuring the translational and rotational velocities of particles in helical motion using structured light 

      Rosales Guzmán, Carmelo; Hermosa, Nathaniel; Belmonte Molina, Aniceto; Pérez Torres, Juan (2014-06-30)
      Article
      Open Access
      We measure the rotational and translational velocity components of particles moving in helical motion under a Laguerre-Gaussian mode illumination. The moving particle reflects light that acquires an additional frequency ...
    • Nanostep height measurement via spatial mode projection 

      Hermosa, Nathaniel; Rosales Guzmán, Carmelo; Pereira, S. F.; Pérez Torres, Juan (2014-01-15)
      Article
      Open Access
      We demonstrate an optical scheme for measuring the thickness of thin nanolayers with the use of light beam ’ s spa- tial modes. The novelty in our scheme is the projection of the beam reflected by the sample onto a ...
    • Puentes, Hermosa, and Torres reply 

      Puentes, Graciana; Hermosa, Nathaniel; Pérez Torres, Juan (2013-07-10)
      Article
      Open Access
      A Reply to the Comment by A. K. Pan and P. K. Panigrahi.
    • Transverse Doppler effect using engineered optical beams 

      Rosales Guzmán, Carmelo; Hermosa, Nathaniel; Belmonte Molina, Aniceto; Pérez Torres, Juan (2013)
      Conference report
      Restricted access - publisher's policy
      When a light beam with a transverse spatially-varying phase is considered for optical remote sensing, in addition to the usual longitudinal Doppler frequency shift of the returned signal induced by the motion of the ...