Ultrasonic lens based on a subwavelength slit surrounded by grooves.
The lensing capabilities of a single subwavelength slit surrounded by a finite array of grooves milled into a brass plate is presented. The modulation of the beam intensity of this ultrasonic lens can be adjusted by varying the groove depth. Numerical simulations as well as experimental validations at 290 kHz are shown. The experimental results are in good agreement with the numerical simulations. This system is believed to have potential applications for medical ultrasound fields such as tomography and therapy.
Centro de Tecnologías Físicas, Universitat Politécnica de Valencia, Camino de Vera s/n. 46022 Valencia, Spain. vgomez@fis.upv.es.
Vicente
V
Gomez-Lozano
Centro de Tecnologías Físicas, Universitat Politécnica de Valencia, Camino de Vera s/n. 46022 Valencia, Spain. pcandelas@fis.upv.es.
Pilar
P
Candelas
Centro de Tecnologías Físicas, Universitat Politécnica de Valencia, Camino de Vera s/n. 46022 Valencia, Spain. fbelmar@fis.upv.es.
Francisco
F
Belmar
Centro de Tecnologías Físicas, Universitat Politécnica de Valencia, Camino de Vera s/n. 46022 Valencia, Spain. crubiom@fis.upv.es.
Constanza
C
Rubio
Centro de Tecnologías Físicas, Universitat Politécnica de Valencia, Camino de Vera s/n. 46022 Valencia, Spain. auris@fis.upv.es.
Antonio
A
Uris
D003198:Computer Simulation; D004867:Equipment Design; D007909:Lenses; D014465:Ultrasonics / Q000295:instrumentation* / Q000379:methods*