Guggenheim, JA;
Li, J;
Allen, TJ;
Colchester, RJ;
Noimark, S;
Ogunlade, O;
Parkin, IP;
... Beard, PC; + view all
(2017)
Ultrasensitive plano-concave optical microresonators for ultrasound sensing.
Nature Photonics
, 11
pp. 714-719.
10.1038/s41566-017-0027-x.
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Abstract
Highly sensitive broadband ultrasound detectors are needed to expand the capabilities of biomedical ultrasound, photoacoustic imaging and industrial ultrasonic non-destructive testing techniques. Here, a generic optical ultrasound sensing concept based on a novel plano-concave polymer microresonator is described. This achieves strong optical confinement (Q-factors > 105) resulting in very high sensitivity with excellent broadband acoustic frequency response and wide directivity. The concept is highly scalable in terms of bandwidth and sensitivity. To illustrate this, a family of microresonator sensors with broadband acoustic responses up to 40 MHz and noise-equivalent pressures as low as 1.6 mPa per √Hz have been fabricated and comprehensively characterized in terms of their acoustic performance. In addition, their practical application to high-resolution photoacoustic and ultrasound imaging is demonstrated. The favourable acoustic performance and design flexibility of the technology offers new opportunities to advance biomedical and industrial ultrasound-based techniques.
| Type: | Article |
|---|---|
| Title: | Ultrasensitive plano-concave optical microresonators for ultrasound sensing |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s41566-017-0027-x |
| Publisher version: | http://dx.doi.org/10.1038/s41566-017-0027-x |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Optics, Physics, Applied, Physics, Resolution Photoacoustic Microscopy, Tomography, Sensor, Sensitivity, Detector |
| 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 Electronic and Electrical Eng UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Med Phys and Biomedical Eng UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10046784 |
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