A collimated focused ultrasound beam of high acoustic transmission and minimum diffraction achieved by using a lens with subwavelength structures

Journal Article · Mon Sep 14 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4931139· OSTI ID:22482100

Lin, Zhou; Tu, Juan; Cheng, Jianchun ^[1]; Guo, Xiasheng ^[1]; Wu, Junru ^[2]; Huang, Pingtong ^[3]; Zhang, Dong ^[1]

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1. Key Laboratory of Modern Acoustics (MOE), Department of Physics, Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing 210093 (China)
2. Department of Physics, University of Vermont, Burlington, Vermont 05405 (United States)
3. Department of Ultrasound, The Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009 (China)

An acoustic focusing lens incorporated with periodically aligned subwavelength grooves corrugated on its spherical surface has been developed. It is demonstrated theoretically and experimentally that acoustic focusing achieved by using the lens can suppress the relative side-lobe amplitudes, enhance the focal gain, and minimize the shifting of the focus. Use of the lens coupled with a planar ultrasound transducer can generate an ultrasound beam with enhanced acoustic transmission and collimation effect, which offers the capability of improving the safety, efficiency, and accuracy of targeted surgery implemented by high intensity focused ultrasound.

• OSTI ID: 22482100
• Journal Information: Applied Physics Letters, Vol. 107, Issue 11; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCURACY
AMPLITUDES
BEAMS
DIFFRACTION
EFFICIENCY
FOCUSING
GAIN
LENSES
PERIODICITY
SPHERICAL CONFIGURATION
SURGERY
TRANSDUCERS
TRANSMISSION