{"title":"Optical tunable terahertz metasurface based on the carbon nanotube film.","authors":"Xiaoju Zhang, Yue Wang, Kexia Jiang, Xiang Zhang, Guangcheng Sun, Lihua Ma, Yumeng Ru","doi":"10.1364/OL.566166","DOIUrl":null,"url":null,"abstract":"<p><p>In this paper, an optical tunable terahertz metasurface based on the carbon nanotube (CNT) film has been designed and fabricated, combining the resonant characteristics of the CNT-based metasurface with the optically tunable properties of the silicon substrate. The transmission properties and optical modulation mechanism of the metasurface were investigated in detail by experiment and simulation. The results show that an obvious transmission peak is located at 0.33 THz when there is no pump beam, but as the pump power increases from 0 to 900 mW, the transmission amplitude decreases, and the modulation depth increases, the modulation depth can achieve 66.0%. The optical tunable response of the CNT metasurface has potential applications in dynamic THz functional devices. The materials and device designed strategies also provide important insights for emerging CNT-based THz devices.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 13","pages":"4182-4185"},"PeriodicalIF":3.1000,"publicationDate":"2025-07-01","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.566166","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
In this paper, an optical tunable terahertz metasurface based on the carbon nanotube (CNT) film has been designed and fabricated, combining the resonant characteristics of the CNT-based metasurface with the optically tunable properties of the silicon substrate. The transmission properties and optical modulation mechanism of the metasurface were investigated in detail by experiment and simulation. The results show that an obvious transmission peak is located at 0.33 THz when there is no pump beam, but as the pump power increases from 0 to 900 mW, the transmission amplitude decreases, and the modulation depth increases, the modulation depth can achieve 66.0%. The optical tunable response of the CNT metasurface has potential applications in dynamic THz functional devices. The materials and device designed strategies also provide important insights for emerging CNT-based THz devices.
期刊介绍：
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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