{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T11:05:46Z","timestamp":1789988746611,"version":"4.0.1"},"reference-count":26,"publisher":"Wiley","issue":"53","license":[{"start":{"date-parts":[[2026,7,29]],"date-time":"2026-07-29T00:00:00Z","timestamp":1785283200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2026,7,29]],"date-time":"2026-07-29T00:00:00Z","timestamp":1785283200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001321","name":"National Research Foundation","doi-asserted-by":"publisher","award":["NRF\u2010MSG\u20102023\u20100002"],"award-info":[{"award-number":["NRF\u2010MSG\u20102023\u20100002"]}],"id":[{"id":"10.13039\/501100001321","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001381","name":"National Research Foundation Singapore","doi-asserted-by":"publisher","award":["NRF\u2010CRP22\u20102019\u20100007"],"award-info":[{"award-number":["NRF\u2010CRP22\u20102019\u20100007"]}],"id":[{"id":"10.13039\/501100001381","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001381","name":"National Research Foundation Singapore","doi-asserted-by":"publisher","award":["NRF\u2010CRP21\u20102018\u20100007"],"award-info":[{"award-number":["NRF\u2010CRP21\u20102018\u20100007"]}],"id":[{"id":"10.13039\/501100001381","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001381","name":"National Research Foundation Singapore","doi-asserted-by":"publisher","award":["NRF\u2010CRP26\u20102021\u20100004"],"award-info":[{"award-number":["NRF\u2010CRP26\u20102021\u20100004"]}],"id":[{"id":"10.13039\/501100001381","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001381","name":"National Research Foundation Singapore","doi-asserted-by":"publisher","award":["NRF\u2010CRP31\u20100001"],"award-info":[{"award-number":["NRF\u2010CRP31\u20100001"]}],"id":[{"id":"10.13039\/501100001381","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["advanced.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Advanced Materials"],"published-print":{"date-parts":[[2026,9]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    The optical properties of quantum systems are fundamentally governed by their electromagnetic environment through the local density of optical states (LDOS), enabling powerful control over atomic, excitonic, and electronic transitions. However, the radiative properties of phonons have remained largely unexplored within this framework of environmental engineering. Here we demonstrate LDOS control of terahertz (THz) phonon emission in the van der Waals ferroelectric NbOI\n                    <jats:sub>2<\/jats:sub>\n                    using a simple mirror geometry. By modifying the photonic environment, we achieve pronounced and reversible tuning of the phonon\n                    <jats:italic>Q<\/jats:italic>\n                    \u2010factor, peak frequency, linewidth, and emission intensity, with modulation approaching an order of magnitude. The observed behavior arises from Purcell\u2010like enhancement and suppression of the phonon radiative rate, revealing a near\u2010unity radiative quantum efficiency in NbOI\n                    <jats:sub>2<\/jats:sub>\n                    . Our results establish radiative phonons as tunable quasiparticles governed by photonic boundary conditions, extending LDOS engineering from electronic to lattice excitations. This framework enables deterministic control of phonon lifetimes and emission spectra, opening new opportunities for compact tunable THz sources and phonon\u2010based quantum and photonic technologies.\n                  <\/jats:p>","DOI":"10.1002\/adma.74337","type":"journal-article","created":{"date-parts":[[2026,7,29]],"date-time":"2026-07-29T08:17:41Z","timestamp":1785313061000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Controlling Radiative Phonons in the van der Waals Ferroelectric NbOI\n                    <sub>2<\/sub>"],"prefix":"10.1002","volume":"38","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-8480-3110","authenticated-orcid":false,"given":"Baolong","family":"Zhang","sequence":"first","affiliation":[{"name":"Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University  Singapore Singapore"},{"name":"Centre For Disruptive Photonic Technologies The Photonics Institute Nanyang Technological University  Singapore Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4999-9735","authenticated-orcid":false,"given":"Ruihuan","family":"Duan","sequence":"additional","affiliation":[{"name":"School of Material Science and Engineering Nanyang Technological University  Singapore Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0008-5859-8099","authenticated-orcid":false,"given":"Sobhan Subhra","family":"Mishra","sequence":"additional","affiliation":[{"name":"Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University  Singapore Singapore"},{"name":"Centre For Disruptive Photonic Technologies The Photonics Institute Nanyang Technological University  Singapore Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3783-7475","authenticated-orcid":false,"given":"Thomas Tan","family":"Caiwei","sequence":"additional","affiliation":[{"name":"Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University  Singapore Singapore"},{"name":"Centre For Disruptive Photonic Technologies The Photonics Institute Nanyang Technological University  Singapore Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8825-7198","authenticated-orcid":false,"given":"Zheng","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Material Science and Engineering Nanyang Technological University  Singapore Singapore"},{"name":"School of Electrical and Electronic Engineering Nanyang Technological University  Singapore Singapore"},{"name":"CINTRA CNRS\/NTU\/THALES, UMI 3288 Research Techno Plaza  Singapore Singapore"},{"name":"Institute for Functional Intelligent Material National University of Singapore  Singapore"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8068-7428","authenticated-orcid":false,"given":"Ranjan","family":"Singh","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering University of Notre Dame Notre Dame IN USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,7,29]]},"reference":[{"key":"e_1_2_9_2_1","doi-asserted-by":"publisher","DOI":"10.1088\/2040\u20108986\/ab7b01"},{"key":"e_1_2_9_3_1","doi-asserted-by":"publisher","DOI":"10.1038\/35097017"},{"key":"e_1_2_9_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/0022\u20102313(70)90082\u20107"},{"key":"e_1_2_9_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/bbpc.19680720261"},{"key":"e_1_2_9_6_1","doi-asserted-by":"publisher","DOI":"10.1063\/5.0049830"},{"key":"e_1_2_9_7_1","doi-asserted-by":"publisher","DOI":"10.1038\/s42005\u2010019\u20100264\u2010z"},{"key":"e_1_2_9_8_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevResearch.2.012029"},{"key":"e_1_2_9_9_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.124.027401"},{"key":"e_1_2_9_10_1","doi-asserted-by":"publisher","DOI":"10.1021\/acs.nanolett.2c04604"},{"key":"e_1_2_9_11_1","doi-asserted-by":"publisher","DOI":"10.1364\/OPTICA.6.001443"},{"key":"e_1_2_9_12_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.120.037402"},{"key":"e_1_2_9_13_1","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.116.224301"},{"key":"e_1_2_9_14_1","doi-asserted-by":"crossref","unstructured":"B.Zhang R.Duan andS. 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