{"id":1427,"date":"2025-06-10T15:11:25","date_gmt":"2025-06-10T05:11:25","guid":{"rendered":"https:\/\/qo.lab.uq.edu.au\/?p=1427"},"modified":"2026-02-20T13:46:33","modified_gmt":"2026-02-20T03:46:33","slug":"paper-photonic-crystal-hydrophone","status":"publish","type":"post","link":"https:\/\/qo.lab.uq.edu.au\/?p=1427","title":{"rendered":"Paper: Photonic Crystal Hydrophone"},"content":{"rendered":"<figure class=\"alignwide wp-block-post-featured-image\"><img loading=\"lazy\" decoding=\"async\" width=\"695\" height=\"288\" src=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/05\/hydrophone-deployment.png\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"\" style=\"object-fit:cover;\" srcset=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/05\/hydrophone-deployment.png 695w, https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/05\/hydrophone-deployment-300x124.png 300w\" sizes=\"auto, (max-width: 695px) 100vw, 695px\" \/><\/figure>\n\n\n<p>20 Jan 2025<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">Abstract<\/h4>\n\n\n\n<p>Many applications, including medical diagnostics, sonar and navigation rely on the detection of acoustic waves. Photonic hydrophones demonstrate comparable sensitivity to piezoelectric-based hydrophones, but with significantly reduced size, weight and power requirements. In this paper we demonstrate a micron-sized free-standing silicon photonic hydrophone. We demonstrate sensitivity on the order of ~mPa\/sqrt(Hz)&nbsp;from 10-200 kHz, with a minimum detectable pressure of 145&nbsp;uPa\/sqrt(Hz)&nbsp;at 22 kHz. We also deployed our hydrophone in a wave flume to evaluate its suitability for underwater measurement and communication. Our hydrophone matches the sensitivity of commercial hydrophones, but is many orders of magnitude smaller in volume, which could enable high spatial resolution imaging of micron-sized acoustic features (i.e., living cell vibrations). Our hydrophone could also be used in underwater communication and imaging applications.<\/p>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"1-figures\">Browse Figures<\/h4>\n\n\n<div style=\"min-height: 285px;; \" class=\"ub_image_slider ub-navigation-outside wp-block-ub-image-slider\" id=\"ub-image-slider-83afd772-7c97-4297-a6c6-91a3a244d4bc\"><div class=\"ub-slider-wrapper\"><div class=\"ub-swiper-button-prev swiper-button-prev\"><\/div><div class=\"ub_image_slider swiper-container swiper\" id=\"ub_image_slider_83afd772-7c97-4297-a6c6-91a3a244d4bc\" data-swiper-data='{\"speed\":300,\"spaceBetween\":20,\"slidesPerView\":1,\"loop\":true,\"pagination\":{\"el\": \".swiper-pagination\" , \"type\": \"bullets\", \"clickable\":true},\"navigation\": {\"nextEl\": \".ub-swiper-button-next\", \"prevEl\": \".ub-swiper-button-prev\"}, \"keyboard\": { \"enabled\": true }, \"effect\": \"slide\",\"simulateTouch\":false}'>\n            <div class=\"swiper-wrapper\"><figure class=\"swiper-slide\">\n                <img decoding=\"async\" src=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/05\/hydrophone_fig1.png\" alt=\"\" style=\"height: 250px;; \">\n                <figcaption class=\"ub_image_slider_image_caption\"><\/figcaption>\n            <\/figure><figure class=\"swiper-slide\">\n                <img decoding=\"async\" src=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/05\/hydrophone_fig2.png\" alt=\"\" style=\"height: 250px;; \">\n                <figcaption class=\"ub_image_slider_image_caption\"><\/figcaption>\n            <\/figure><figure class=\"swiper-slide\">\n                <img decoding=\"async\" src=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/05\/hydrophone_fig3.png\" alt=\"\" style=\"height: 250px;; \">\n                <figcaption class=\"ub_image_slider_image_caption\"><\/figcaption>\n            <\/figure><figure class=\"swiper-slide\">\n                <img decoding=\"async\" src=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/05\/hydrophone_fig4.png\" alt=\"\" style=\"height: 250px;; \">\n                <figcaption class=\"ub_image_slider_image_caption\"><\/figcaption>\n            <\/figure><figure class=\"swiper-slide\">\n                <img decoding=\"async\" src=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/05\/hydrophone_fig5.png\" alt=\"\" style=\"height: 250px;; \">\n                <figcaption class=\"ub_image_slider_image_caption\"><\/figcaption>\n            <\/figure><\/div>\n            <div class=\"swiper-pagination\"><\/div>\n            \n        <\/div><div class=\"ub-swiper-button-next swiper-button-next\"><\/div><\/div><\/div>\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"1-figures\">Authors<\/h4>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/qo.lab.uq.edu.au\/index.php\/team-members\/lauren-mcqueen\/\"><img loading=\"lazy\" decoding=\"async\" width=\"512\" height=\"512\" src=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/lauren_headshot.jpg\" alt=\"\" class=\"wp-image-1227\" style=\"aspect-ratio:1;object-fit:cover\" srcset=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/lauren_headshot.jpg 512w, https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/lauren_headshot-300x300.jpg 300w, https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/lauren_headshot-150x150.jpg 150w\" sizes=\"auto, (max-width: 512px) 100vw, 512px\" \/><\/a><figcaption class=\"wp-element-caption\">Lauren McQueen<\/figcaption><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/qo.lab.uq.edu.au\/index.php\/team-members\/dr-nathaniel-bawden\/\"><img loading=\"lazy\" decoding=\"async\" width=\"821\" height=\"1024\" src=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2021\/09\/nbawden-821x1024.png\" alt=\"\" class=\"wp-image-856\" style=\"aspect-ratio:1;object-fit:cover\" srcset=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2021\/09\/nbawden-821x1024.png 821w, https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2021\/09\/nbawden-241x300.png 241w, https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2021\/09\/nbawden-768x958.png 768w, https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2021\/09\/nbawden.png 1053w\" sizes=\"auto, (max-width: 821px) 100vw, 821px\" \/><\/a><figcaption class=\"wp-element-caption\">Nathaniel Bawden<\/figcaption><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/qo.lab.uq.edu.au\/index.php\/team-members\/dr-benjamin-carey\/\"><img loading=\"lazy\" decoding=\"async\" width=\"372\" height=\"387\" src=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/ben_headshot.png\" alt=\"\" class=\"wp-image-1253\" style=\"aspect-ratio:1;object-fit:cover\" srcset=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/ben_headshot.png 372w, https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/ben_headshot-288x300.png 288w\" sizes=\"auto, (max-width: 372px) 100vw, 372px\" \/><\/a><figcaption class=\"wp-element-caption\">Benjamin Carey<\/figcaption><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><a href=\"https:\/\/qo.lab.uq.edu.au\/index.php\/team-members\/dr-igor-marinkovic\/\"><img loading=\"lazy\" decoding=\"async\" width=\"476\" height=\"512\" src=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/igor_headshot.jpeg\" alt=\"\" class=\"wp-image-1215\" style=\"aspect-ratio:1;object-fit:cover\" srcset=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/igor_headshot.jpeg 476w, https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/igor_headshot-279x300.jpeg 279w\" sizes=\"auto, (max-width: 476px) 100vw, 476px\" \/><\/a><figcaption class=\"wp-element-caption\">Igor Marinkovi\u0107<\/figcaption><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/qo.lab.uq.edu.au\/index.php\/team-members\/warwick-bowen\/\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/warwick_headshot-1024x1024.jpg\" alt=\"\" class=\"wp-image-1157\" style=\"aspect-ratio:1;object-fit:cover\" srcset=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/warwick_headshot-1024x1024.jpg 1024w, https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/warwick_headshot-300x300.jpg 300w, https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/warwick_headshot-150x150.jpg 150w, https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/warwick_headshot-768x768.jpg 768w, https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/warwick_headshot.jpg 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Warwick Bowen<\/figcaption><\/figure>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"482\" height=\"482\" src=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/05\/glen_headshot.png\" alt=\"\" class=\"wp-image-1460\" style=\"aspect-ratio:1;object-fit:cover\" srcset=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/05\/glen_headshot.png 482w, https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/05\/glen_headshot-300x300.png 300w, https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/05\/glen_headshot-150x150.png 150w\" sizes=\"auto, (max-width: 482px) 100vw, 482px\" \/><figcaption class=\"wp-element-caption\">Glen Harris<\/figcaption><\/figure>\n<\/div><\/div>\n<\/div>\n\n\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n<div style=\"gap: 20px;\" class=\"align-button-center ub-buttons orientation-button-row ub-flex-wrap wp-block-ub-button\" id=\"ub-button-abb31461-43ec-42c3-82a5-24acdce35d36\"><div class=\"ub-button-container ub-button-full-container\">\n\t\t\t<a href=\"https:\/\/doi.org\/10.1364\/OE.557657\" target=\"_blank\" rel=\"noopener noreferrer\" class=\"ub-button-block-main  ub-button-full-width \" role=\"button\" style=\"--ub-button-background-color: #9362c4; --ub-button-color: #ffffff; --ub-button-border: none; --ub-button-hover-background-color: #000000; --ub-button-hover-color: #ffffff; --ub-button-hover-border: none; font-size: 25px; padding-top: 10px; padding-right: 10px; padding-bottom: 10px; padding-left: 10px; border-top-left-radius: 10px;; border-top-right-radius: 10px;; border-bottom-left-radius: 10px;; border-bottom-right-radius: 10px;; \">\n\t\t\t\t<div class=\"ub-button-content-holder\" style=\"flex-direction: row-reverse\">\n\t\t\t\t\t<span class=\"ub-button-icon-holder\">\n\t\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" height=\"35\" width=\"35\" viewbox=\"0 0 512 512\">\n\t\t\t\t\t<path fill=\"currentColor\" d=\"M502.6 278.6c12.5-12.5 12.5-32.8 0-45.3l-128-128c-12.5-12.5-32.8-12.5-45.3 0s-12.5 32.8 0 45.3L402.7 224 32 224c-17.7 0-32 14.3-32 32s14.3 32 32 32l370.7 0-73.4 73.4c-12.5 12.5-12.5 32.8 0 45.3s32.8 12.5 45.3 0l128-128z\">\n\t\t\t\t<\/path><\/svg>\n\t\t\t<\/span><span class=\"ub-button-block-btn\">Read More<\/span>\n\t\t\t\t<\/div>\n\t\t\t<\/a>\n\t\t<\/div><\/div>\n\n\n<div style=\"height:250px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-group is-nowrap is-layout-flex wp-container-core-group-is-layout-6c531013 wp-block-group-is-layout-flex\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"352\" height=\"93\" src=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/qqol.png\" alt=\"\" class=\"wp-image-1058\" srcset=\"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/qqol.png 352w, https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/04\/qqol-300x79.png 300w\" sizes=\"auto, (max-width: 352px) 100vw, 352px\" \/><\/figure>\n\n\n<div class=\"wp-block-ub-divider ub_divider ub-divider-orientation-vertical\" id=\"ub_divider_6a77fd73-673d-445f-ab67-8072613c0083\"><div class=\"ub_divider_wrapper\" style=\"position: relative; width: 2px; height: 100px; \" data-divider-alignment=\"center\"><div class=\"ub_divider_line\" style=\"border-left: 2px solid #ccc; width: fit-content; height: 100px; \"><\/div><\/div><\/div>\n\n\n<div class=\"wp-block-group is-vertical is-layout-flex wp-container-core-group-is-layout-fe9cc265 wp-block-group-is-layout-flex\">\n<p>Copyright \u00a9 2025 University of Queensland <\/p>\n\n\n\n<p><a href=\"https:\/\/www.uq.edu.au\/legal\/copyright-privacy-disclaimer\/\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#000000\" class=\"has-inline-color\">UQ Privacy Policy<\/mark><\/a><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>20 Jan 2025 Abstract Many applications, including medical diagnostics, sonar and navigation rely on the detection of acoustic waves. Photonic hydrophones demonstrate comparable sensitivity to piezoelectric-based hydrophones, but with significantly reduced size, weight and power requirements. In this paper we demonstrate a micron-sized free-standing silicon photonic hydrophone. We demonstrate sensitivity on the order of ~mPa\/sqrt(Hz)&nbsp;from [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":1453,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"cybocfi_hide_featured_image":"yes","footnotes":""},"categories":[1],"tags":[],"class_list":["post-1427","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorised"],"featured_image_src":"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/05\/hydrophone-deployment.png","author_info":{"display_name":false,"author_link":"https:\/\/qo.lab.uq.edu.au\/?author=1"},"jetpack_featured_media_url":"https:\/\/qo.lab.uq.edu.au\/wp-content\/uploads\/2025\/05\/hydrophone-deployment.png","_links":{"self":[{"href":"https:\/\/qo.lab.uq.edu.au\/index.php?rest_route=\/wp\/v2\/posts\/1427","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/qo.lab.uq.edu.au\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qo.lab.uq.edu.au\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qo.lab.uq.edu.au\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qo.lab.uq.edu.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1427"}],"version-history":[{"count":10,"href":"https:\/\/qo.lab.uq.edu.au\/index.php?rest_route=\/wp\/v2\/posts\/1427\/revisions"}],"predecessor-version":[{"id":1821,"href":"https:\/\/qo.lab.uq.edu.au\/index.php?rest_route=\/wp\/v2\/posts\/1427\/revisions\/1821"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/qo.lab.uq.edu.au\/index.php?rest_route=\/wp\/v2\/media\/1453"}],"wp:attachment":[{"href":"https:\/\/qo.lab.uq.edu.au\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qo.lab.uq.edu.au\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qo.lab.uq.edu.au\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}