{"title":"单层石墨烯在近红外区域的窄带吸收增强和表面等离子体极化子调制","authors":"","doi":"10.1016/j.physb.2024.416521","DOIUrl":null,"url":null,"abstract":"<div><p>We theoretically study the very sharp absorption enhancement of the single layer graphene by the surface plasmon polaritons in near-infrared region. We place the single layer graphene on the silver substrate surface with a periodic slit array. Such a structure design is helpful to reduce the difficulty in experimental fabrication. By changing the slit period, we can largely tune the absorption peak of the single layer graphene in the wavelength range from 1000 nm to 2000 nm, covering the well-known communication wavelength of 1550 nm. The absorption efficiency of the single layer graphene varies between about 20 % and 80 %, and the absorption bandwidth is reduced from about 10 nm to 1 nm. Moreover, by changing the Fermi energy of the single layer graphene, we can also completely modulate the absorption peak from a maximum to almost zero and thus realize a nearly 100 % modulation depth. This work has a potential application in electro-optic modulators.</p></div>","PeriodicalId":20116,"journal":{"name":"Physica B-condensed Matter","volume":null,"pages":null},"PeriodicalIF":2.8000,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Narrow-band absorption enhancement and modulation of single layer graphene by surface plasmon polaritons in near-infrared region\",\"authors\":\"\",\"doi\":\"10.1016/j.physb.2024.416521\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>We theoretically study the very sharp absorption enhancement of the single layer graphene by the surface plasmon polaritons in near-infrared region. We place the single layer graphene on the silver substrate surface with a periodic slit array. Such a structure design is helpful to reduce the difficulty in experimental fabrication. By changing the slit period, we can largely tune the absorption peak of the single layer graphene in the wavelength range from 1000 nm to 2000 nm, covering the well-known communication wavelength of 1550 nm. The absorption efficiency of the single layer graphene varies between about 20 % and 80 %, and the absorption bandwidth is reduced from about 10 nm to 1 nm. Moreover, by changing the Fermi energy of the single layer graphene, we can also completely modulate the absorption peak from a maximum to almost zero and thus realize a nearly 100 % modulation depth. This work has a potential application in electro-optic modulators.</p></div>\",\"PeriodicalId\":20116,\"journal\":{\"name\":\"Physica B-condensed Matter\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2024-09-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Physica B-condensed Matter\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0921452624008627\",\"RegionNum\":3,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"PHYSICS, CONDENSED MATTER\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physica B-condensed Matter","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0921452624008627","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, CONDENSED MATTER","Score":null,"Total":0}
Narrow-band absorption enhancement and modulation of single layer graphene by surface plasmon polaritons in near-infrared region
We theoretically study the very sharp absorption enhancement of the single layer graphene by the surface plasmon polaritons in near-infrared region. We place the single layer graphene on the silver substrate surface with a periodic slit array. Such a structure design is helpful to reduce the difficulty in experimental fabrication. By changing the slit period, we can largely tune the absorption peak of the single layer graphene in the wavelength range from 1000 nm to 2000 nm, covering the well-known communication wavelength of 1550 nm. The absorption efficiency of the single layer graphene varies between about 20 % and 80 %, and the absorption bandwidth is reduced from about 10 nm to 1 nm. Moreover, by changing the Fermi energy of the single layer graphene, we can also completely modulate the absorption peak from a maximum to almost zero and thus realize a nearly 100 % modulation depth. This work has a potential application in electro-optic modulators.
期刊介绍:
Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work.
Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas:
-Magnetism
-Materials physics
-Nanostructures and nanomaterials
-Optics and optical materials
-Quantum materials
-Semiconductors
-Strongly correlated systems
-Superconductivity
-Surfaces and interfaces