{"title":"Topological Tamm edge states.","authors":"Chuxin Dai, Tian Sang, Guofeng Yang, Yueke Wang","doi":"10.1364/OL.565242","DOIUrl":null,"url":null,"abstract":"<p><p>In this paper, we propose a Tamm plasmon structure composed of a tungsten film and distributed Bragg reflector, which can achieve perfect absorption due to critical coupling. By tuning the thickness of the tungsten film, the reflection topology of the Tamm plasmon polariton can be manipulated, which is determined by the winding number of the reflection spectral curve in the complex plane. The interface between trivial and non-trivial surfaces supports a topological Tamm edge state, which is confined within a narrow spatial range. The simulation results based on the finite element method verify the spin-locked characteristic of the topological edge state. Our method provides a new, to our knowledge, way toward spatial control of thermal radiation by utilizing a reflection topological interface.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 12","pages":"3867-3870"},"PeriodicalIF":3.1000,"publicationDate":"2025-06-15","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.565242","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}
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Abstract
In this paper, we propose a Tamm plasmon structure composed of a tungsten film and distributed Bragg reflector, which can achieve perfect absorption due to critical coupling. By tuning the thickness of the tungsten film, the reflection topology of the Tamm plasmon polariton can be manipulated, which is determined by the winding number of the reflection spectral curve in the complex plane. The interface between trivial and non-trivial surfaces supports a topological Tamm edge state, which is confined within a narrow spatial range. The simulation results based on the finite element method verify the spin-locked characteristic of the topological edge state. Our method provides a new, to our knowledge, way toward spatial control of thermal radiation by utilizing a reflection topological interface.
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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