Brown, MD;
Nikitichev, DI;
Treeby, BE;
Cox, BT;
(2017)
Generating arbitrary ultrasound fields with tailored optoacoustic surface profiles.
APPLIED PHYSICS LETTERS
, 110
(9)
, Article 094102. 10.1063/1.4976942.
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Abstract
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.
| Type: | Article |
|---|---|
| Title: | Generating arbitrary ultrasound fields with tailored optoacoustic surface profiles |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/1.4976942 |
| Publisher version: | http://dx.doi.org/10.1063/1.4976942 |
| Language: | English |
| Additional information: | All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Science & Technology, Physical Sciences, Physics, Applied, Physics, ACOUSTIC ELEMENTS, HOLOGRAMS, Optical pulse generation, 3D printing, Sound pressure, Surface patterning, Focal points |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1550378 |
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