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Sensors 2014, 14(5), 8821-8828; doi:10.3390/s140508821

Ultrasonic Lens Based on a Subwavelength Slit Surrounded by Grooves

Centro de Tecnologías Físicas, Universitat Politécnica de Valencia, Camino de Vera s/n. 46022 Valencia, Spain
Author to whom correspondence should be addressed.
Received: 10 April 2014 / Revised: 7 May 2014 / Accepted: 15 May 2014 / Published: 19 May 2014
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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.
Keywords: subwavelength slit; ultrasonic lens; grooves array subwavelength slit; ultrasonic lens; grooves array
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Gomez-Lozano, V.; Candelas, P.; Belmar, F.; Rubio, C.; Uris, A. Ultrasonic Lens Based on a Subwavelength Slit Surrounded by Grooves. Sensors 2014, 14, 8821-8828.

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