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题名: Launching Phonon Polaritons by Natural Boron Nitride Wrinkles with Modifiable Dispersion by Dielectric Environments
作者: Duan, Jiahua1, 2;  Chen, Runkun1, 2;  Li, Jingcheng1, 2;  Jin, Kuijuan1, 2, 3;  Sun, Zhigang4, 5;  Chen, Jianing1, 2, 3
关键词: dielectric environments ;  dispersion ;  hexagonal boron nitride ;  hyperbolic phonon polaritons ;  wrinkles
刊名: ADVANCED MATERIALS
发表日期: 2017-10-11
DOI: 10.1002/adma.201702494
卷: 29, 期:38
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Multidisciplinary ;  Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary ;  Physics, Applied ;  Physics, Condensed Matter
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science ;  Physics
英文摘要: Interference-free hyperbolic phonon polaritons (HPPs) excited by natural wrinkles in a hexagonal boron nitride (hBN) microcrystal are reported both experimentally and theoretically. Although their geometries are off-resonant with the excitation wavelength, the wrinkles compensate for the large momentum mismatch between photon and phonon polariton, and launch the HPPs without interference. The spatial feature of wrinkles is about 200 nm, which is an order of magnitude smaller than resonant metal antennas at the same excitation wavelength. Compared with phonon polaritons launched by an atomic force microscopy tip, the phonon polaritons launched by wrinkles are interference-free, independent of the launcher geometry, and exhibit a smaller damping rate (approximate to 0.028). On the same hBN microcrystal, in situ nanoinfrared imaging of HPPs launched by different mechanisms is performed. In addition, the dispersion of HPPs is modified by changing the dielectric environments of hBN crystals. The wavelength of HPPs is compressed twofold when the substrate is changed from SiO2 to gold. The findings provide insights into the intrinsic properties of hBN-HPPs and demonstrate a new way to launch and control polaritons in van der Waals materials.
关键词[WOS]: GRAPHENE DOMAIN-WALLS ;  NEGATIVE REFRACTION ;  PLASMONIC PHENOMENA ;  METAMATERIALS ;  REFLECTION ;  NANOSCALE ;  EDGE
语种: 英语
WOS记录号: WOS:000412452500014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/150062
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China
3.Collaborat Innovat Ctr Quantum Matter, Beijing 100190, Peoples R China
4.Chinese Acad Sci, Dalian Inst Chem Phys, Ctr Theoret & Computat Chem, Dalian 116023, Peoples R China
5.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China

Recommended Citation:
Duan, Jiahua,Chen, Runkun,Li, Jingcheng,et al. Launching Phonon Polaritons by Natural Boron Nitride Wrinkles with Modifiable Dispersion by Dielectric Environments[J]. ADVANCED MATERIALS,2017,29(38).
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