{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T16:01:02Z","timestamp":1785427262087,"version":"3.56.0"},"reference-count":47,"publisher":"Optica Publishing Group","issue":"26","license":[{"start":{"date-parts":[[2025,9,9]],"date-time":"2025-09-09T00:00:00Z","timestamp":1757376000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR"},{"start":{"date-parts":[[2025,9,9]],"date-time":"2025-09-09T00:00:00Z","timestamp":1757376000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["62161005"],"award-info":[{"award-number":["62161005"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100012547","name":"Natural Science Foundation of Guangxi Zhuang Autonomous Region","doi-asserted-by":"publisher","award":["2025GXNSFAA069795"],"award-info":[{"award-number":["2025GXNSFAA069795"]}],"id":[{"id":"10.13039\/100012547","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100011784","name":"Guangxi Zhuang Autonomous Region Key Laboratory of Automatic Detecting Technology and Instruments","doi-asserted-by":"publisher","award":["YQ22107"],"award-info":[{"award-number":["YQ22107"]}],"id":[{"id":"10.13039\/501100011784","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Appl. Opt."],"published-print":{"date-parts":[[2025,9,10]]},"abstract":"<jats:p>\n                    To address the challenge of dynamically controlling the operating bands of terahertz wave polarization conversion, we propose a tunable terahertz metamaterial device capable of switching its asymmetric transmission between single-band and dual-band modes. The device consists of a top layer of gold and vanadium dioxide, separated from the bottom layer by a polyimide spacer layer. The bottom layer is a mirror-symmetric and 90\u00b0-rotated configuration of the top structure. Leveraging vanadium dioxide\u2019s phase transition property from an insulating to a metallic state upon heating enables the tunability of incident terahertz waves. In the metallic state, the structure exhibits pronounced single-band asymmetric transmission, with a transmission coefficient\n                    <jats:italic>T<\/jats:italic>\n                    <jats:sub>yx<\/jats:sub>\n                    reaching 0.85 at 1.54\u00a0THz, while\n                    <jats:italic>T<\/jats:italic>\n                    <jats:sub>xy<\/jats:sub>\n                    remains at 0.06. In the insulating state, dual-band asymmetric transmission is observed, with peak\n                    <jats:italic>T<\/jats:italic>\n                    <jats:sub>yx<\/jats:sub>\n                    values of 0.786 at 1.45\u00a0THz and 0.783 at 2.0\u00a0THz, and corresponding\n                    <jats:italic>T<\/jats:italic>\n                    <jats:sub>xy<\/jats:sub>\n                    values of 0.06 and 0.07, respectively. Analysis of the structural surface currents reveals that the structure excites asymmetric dipole current resonance, which enables cross-coupling between the incident electric field and induced magnetic field, resulting in asymmetric transmission. The introduction of the coupled-mode theory abstracts the metamaterial as a coupled dual-resonator system, thereby providing further insights into the physical mechanism of dual-band polarization conversion. This tunable asymmetric transmission device presents a promising approach for expanding the applications of filters and tunable optoelectronic devices.\n                  <\/jats:p>","DOI":"10.1364\/ao.572124","type":"journal-article","created":{"date-parts":[[2025,8,19]],"date-time":"2025-08-19T17:00:08Z","timestamp":1755622808000},"page":"7807","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["VO\n                    <sub>2<\/sub>\n                    -based reconfigurable metamaterial enabling switchable single-dual-band asymmetric transmission at terahertz frequencies"],"prefix":"10.1364","volume":"64","author":[{"given":"Xianhua","family":"Yin","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05arjae42","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Guilin\u00a0University of Electronic Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Junrong","family":"Su","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05arjae42","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Guilin\u00a0University of Electronic Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huo","family":"Zhang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/05arjae42","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2025,9,9]]},"reference":[{"key":"ao-64-26-7807-R1","doi-asserted-by":"publisher","first-page":"38","DOI":"10.1109\/MAES.2024.3476228","volume":"39","author":"Elbir","year":"2024","journal-title":"IEEE Aerosp. 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All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.","name":"copyright","label":"Copyright"}]}}