{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T17:49:06Z","timestamp":1791481746710,"version":"4.3.4"},"reference-count":24,"publisher":"Optica Publishing Group","issue":"20","license":[{"start":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T00:00:00Z","timestamp":1791417600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/doi.org\/10.1364\/OA_License_v2#VOR"},{"start":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T00:00:00Z","timestamp":1791417600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/opg.optica.org\/policies\/opg-tdm-policy.json"}],"funder":[{"name":"National Natural Science Foundation of China","award":["62271216"],"award-info":[{"award-number":["62271216"]}],"id":[{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"publisher"}]},{"name":"National Natural Science Foundation of China","award":["62321002"],"award-info":[{"award-number":["62321002"]}],"id":[{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"publisher"}]},{"name":"Guangdong Basic and Applied Basic Research Funding","award":["2026B1515020092"],"award-info":[{"award-number":["2026B1515020092"]}]}],"content-domain":{"domain":["opg.optica.org"],"crossmark-restriction":false},"short-container-title":["Opt. Lett."],"published-print":{"date-parts":[[2026,10,15]]},"abstract":"<jats:p>\n                    Terahertz (THz) metasurfaces with efficient and electrically reconfigurable electromagnetic responses are highly desired for emerging wireless communication systems. However, realizing compact solid-state active THz devices with multiband modulation capability remains challenging. Here, we demonstrate a dual-band electrically reconfigurable THz metasurface enabled by AlGaN\/GaN high-electron-mobility transistors (HEMTs). The dual-band response originates from two cavity modes supported by the reflective metal\u2013insulator\u2013metal (MIM) structure, while the gate-controlled two-dimensional electron gas (2DEG) channel tunes the effective surface admittance of the HEMT-integrated metasurface. The fabricated device achieves reflection amplitude modulation depths of 59% and 94% at 0.245 and 0.429\u2009THz, respectively, together with maximum phase shifts of 35\n                    <jats:sup>\u2218<\/jats:sup>\n                    and 180\n                    <jats:sup>\u2218<\/jats:sup>\n                    at 0.238 and 0.425\u2009THz. This work extends AlGaN\/GaN HEMT-based THz modulation toward dual-band operation, offering enhanced frequency-domain flexibility for wireless communications and spectroscopic sensing.\n                  <\/jats:p>","DOI":"10.1364\/ol.613679","type":"journal-article","created":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T13:41:57Z","timestamp":1791466917000},"page":"5762","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Dual-band electrically reconfigurable terahertz metasurface enabled by AlGaN\/GaN HEMTs"],"prefix":"10.1364","volume":"51","author":[{"given":"Shanri","family":"Chen","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/0530pts50","id-type":"ROR","asserted-by":"publisher"}]},{"name":"South China University of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guizhen","family":"Xu","sequence":"additional","affiliation":[{"name":"Southern University of Science and Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8697-3860","authenticated-orcid":true,"given":"Shaolin","family":"Zhou","sequence":"additional","affiliation":[{"name":"South China University of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2839-5940","authenticated-orcid":true,"given":"Longqing","family":"Cong","sequence":"additional","affiliation":[{"name":"Southern University of Science and Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7972-4789","authenticated-orcid":true,"given":"Haoshen","family":"Zhu","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/0530pts50","id-type":"ROR","asserted-by":"publisher"}]},{"name":"South China University of Technology"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2026,10,8]]},"reference":[{"key":"ol-51-20-5762-R1","doi-asserted-by":"publisher","first-page":"977","DOI":"10.1038\/nphoton.2013.275","type":"journal-article","volume":"7","author":"Koenig","year":"2013","journal-title":"Nat. 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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"}]}}