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Precision ultrasound sensing on a chip / Sahar Basiri Esfahani, Ardalan Armin, Stefan Forstner, Warwick P. Bowen

Nature Communications, Volume: 10, Issue: 1

Swansea University Authors: Sahar Basiri Esfahani, Ardalan Armin

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Abstract

Ultrasound sensors have wide applications across science and technology. However, improved sensitivity is required for both miniaturisation and increased spatial resolution. Here, we introduce cavity optomechanical ultrasound sensing, where dual optical and mechanical resonances enhance the ultrasou...

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Published in: Nature Communications
ISSN: 2041-1723
Published: 2019
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URI: https://cronfa.swan.ac.uk/Record/cronfa48134
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first_indexed 2019-01-10T14:00:58Z
last_indexed 2020-06-23T18:59:22Z
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spelling 2020-06-23T15:30:22.9154432 v2 48134 2019-01-10 Precision ultrasound sensing on a chip 883ba919c55d2c799d7a941803b2e93a 0000-0001-7634-158X Sahar Basiri Esfahani Sahar Basiri Esfahani true false 22b270622d739d81e131bec7a819e2fd 0000-0002-6129-5354 Ardalan Armin Ardalan Armin true false 2019-01-10 SPH Ultrasound sensors have wide applications across science and technology. However, improved sensitivity is required for both miniaturisation and increased spatial resolution. Here, we introduce cavity optomechanical ultrasound sensing, where dual optical and mechanical resonances enhance the ultrasound signal. We achieve noise equivalent pressures of 8-300 micro Pascal per root Hertz at kilohertz to megahertz frequencies in a microscale silicon-chip-based sensor with &#62;120 dB dynamic range. The sensitivity far exceeds similar sensors that use an optical resonance alone and, normalised to the sensing area, surpasses previous air-coupled ultrasound sensors by several orders of magnitude. The noise floor is dominated by collisions from molecules in the gas within which the acoustic wave propagates. This approach to acoustic sensing could find applications ranging from biomedical diagnostics, to autonomous navigation, trace gas sensing, and scientific exploration of the metabolism-induced-vibrations of single cells. Journal Article Nature Communications 10 1 2041-1723 10 1 2019 2019-01-10 10.1038/s41467-018-08038-4 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2020-06-23T15:30:22.9154432 2019-01-10T10:40:36.2836376 College of Science Physics Sahar Basiri Esfahani 0000-0001-7634-158X 1 Ardalan Armin 0000-0002-6129-5354 2 Stefan Forstner 3 Warwick P. Bowen 4 0048134-10012019104246.pdf s41467-018-08038-4.pdf 2019-01-10T10:42:46.3370000 Output 1512621 application/pdf Version of Record true 2019-01-10T00:00:00.0000000 Released under the terms of a Creative Commons Attribution 4.0 International License (CC-BY). true eng
title Precision ultrasound sensing on a chip
spellingShingle Precision ultrasound sensing on a chip
Sahar, Basiri Esfahani
Ardalan, Armin
title_short Precision ultrasound sensing on a chip
title_full Precision ultrasound sensing on a chip
title_fullStr Precision ultrasound sensing on a chip
title_full_unstemmed Precision ultrasound sensing on a chip
title_sort Precision ultrasound sensing on a chip
author_id_str_mv 883ba919c55d2c799d7a941803b2e93a
22b270622d739d81e131bec7a819e2fd
author_id_fullname_str_mv 883ba919c55d2c799d7a941803b2e93a_***_Sahar, Basiri Esfahani
22b270622d739d81e131bec7a819e2fd_***_Ardalan, Armin
author Sahar, Basiri Esfahani
Ardalan, Armin
author2 Sahar Basiri Esfahani
Ardalan Armin
Stefan Forstner
Warwick P. Bowen
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container_title Nature Communications
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publishDate 2019
institution Swansea University
issn 2041-1723
doi_str_mv 10.1038/s41467-018-08038-4
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description Ultrasound sensors have wide applications across science and technology. However, improved sensitivity is required for both miniaturisation and increased spatial resolution. Here, we introduce cavity optomechanical ultrasound sensing, where dual optical and mechanical resonances enhance the ultrasound signal. We achieve noise equivalent pressures of 8-300 micro Pascal per root Hertz at kilohertz to megahertz frequencies in a microscale silicon-chip-based sensor with &#62;120 dB dynamic range. The sensitivity far exceeds similar sensors that use an optical resonance alone and, normalised to the sensing area, surpasses previous air-coupled ultrasound sensors by several orders of magnitude. The noise floor is dominated by collisions from molecules in the gas within which the acoustic wave propagates. This approach to acoustic sensing could find applications ranging from biomedical diagnostics, to autonomous navigation, trace gas sensing, and scientific exploration of the metabolism-induced-vibrations of single cells.
published_date 2019-01-10T04:06:35Z
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