期刊
APPLIED PHYSICS LETTERS
卷 110, 期 9, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4976942
关键词
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资金
- Engineering and Physical Sciences Research Council
- UCL EPSRC Centre for Doctoral Training in Medical Imaging
- EPSRC [EP/L020262/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [1343332, EP/L020262/1, EP/M011119/1] Funding Source: researchfish
Acoustic fields with multiple foci have many applications in physical acoustics ranging from particle manipulation to neural modulation. However, the generation of multiple foci at arbitrary locations in three-dimensional is challenging using conventional transducer technology. In this work, the optical generation of acoustic fields focused at multiple points using a single optical pulse is demonstrated. This is achieved using optically absorbing surface profiles designed to generate specific, user-defined, wavefields. An optimisation approach for the design of these tailored surface profiles is developed. This searches for a smoothly varying surface that will generate a high peak pressure at a set of target focal points. The designed surface profiles are then realised via a combination of additive manufacturing and absorber deposition techniques. Acoustic field measurements from a sample designed to generate the numeral 7 are used to demonstrate the design method. (C) 2017 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license
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