{"title":"Light-driven lattice reconfiguration for terahertz functional metamaterials.","authors":"Vanlal Rinfela, Sutopa Modak, Sangram Kumar Sadhu, Manukumara Manjappa, Prem Pal, Abhishek Kumar, Manoj Gupta, Yogesh Kumar Srivastava","doi":"10.1364/OL.608504","DOIUrl":null,"url":null,"abstract":"<p><p>Surface lattice resonances (SLRs), or lattice modes, support high-<i>Q</i> resonances and significant electromagnetic field enhancement via diffractive coupling, arising from collective Rayleigh scattering in periodically structured metamaterial resonator arrays. However, the spectral characteristics of lattice modes are fixed by structural periodicity, thereby limiting their post-fabrication reconfigurability. Here, we demonstrate light-driven reconfiguration of lattice modes in a terahertz (THz) metamaterial without changing its physical structure. The device comprises a complementary asymmetric split-ring resonator metamaterial integrated with selective photo-active silicon regions. The incident terahertz radiation experiences an effective lattice periodicity that is optically reconfigured from 70 µm towards 140 µm. The pump-induced effect primarily increases the <i>Q</i>-factor of the Fano resonance by reconfiguring its coupling to the lattice mode.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"51 20","pages":"5645-5648"},"PeriodicalIF":3.3000,"publicationDate":"2026-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/OL.608504","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/9/14 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Surface lattice resonances (SLRs), or lattice modes, support high-Q resonances and significant electromagnetic field enhancement via diffractive coupling, arising from collective Rayleigh scattering in periodically structured metamaterial resonator arrays. However, the spectral characteristics of lattice modes are fixed by structural periodicity, thereby limiting their post-fabrication reconfigurability. Here, we demonstrate light-driven reconfiguration of lattice modes in a terahertz (THz) metamaterial without changing its physical structure. The device comprises a complementary asymmetric split-ring resonator metamaterial integrated with selective photo-active silicon regions. The incident terahertz radiation experiences an effective lattice periodicity that is optically reconfigured from 70 µm towards 140 µm. The pump-induced effect primarily increases the Q-factor of the Fano resonance by reconfiguring its coupling to the lattice mode.
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The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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