Li, J;
Taylor, A;
Papakonstantinou, I;
Zhang, E;
Beard, P;
(2014)
Highly sensitive optical microresonator sensors for photoacoustic imaging.
In: Oraevsky, AA and Wang, LV, (eds.)
Proceedings of the Photons Plus Ultrasound: Imaging and Sensing 2014.
(pp. 89430C-1-89430C-10).
SPIE: San Francisco, CA, United States.
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Abstract
We present novel concave Fabry Perot (FP) sensor arrays for photoacoustic imaging which were fabricated using a high-precision inkjet printing approach to produce the cavity and employed physical vapor deposition to form the dielectric mirrors. Our concave FP cavity design provides excellent beam confinement within the cavity enabling high finesse and thus high sensitivity to be achieved. Two such concave sensors are evaluated in terms of their sensitivity and acoustic bandwidth. A 66 μm thick concave sensor is shown to provide a noise equivalent pressure (NEP) of 85 Pa and an acoustic bandwidth of 16 MHz, and can potentially be used as a sensitive broadband sensor for superficial imaging. A 250 μm thick sensor with an NEP of 12 Pa and acoustic bandwidth of 4 MHz was also developed for deep tissue imaging applications.
| Type: | Proceedings paper |
|---|---|
| Title: | Highly sensitive optical microresonator sensors for photoacoustic imaging |
| Event: | SPIE BiOS Conference on Photons Plus Ultrasound: Imaging and Sensing 2014 |
| Location: | San Francisco, CA |
| Dates: | 02 February 2014 - 05 February 2014 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.2037015 |
| Publisher version: | https://doi.org/10.4108/i10.1117/12.2037015 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Medical Imaging, Photoacoustics, non-invasive imaging, deep tissue imaging, Fabry Perot sensor, sensor array, concave cavity, ultrasound, Sensors, Acoustics, Mirrors, Visibility,Protactinium,Reflectivity, Wavefronts |
| 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 Chemical Engineering 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 |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1419129 |
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