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Scaling and Reflection Behaviors of Polaritons in Low‐Dimensional Materials
Author(s) -
Shen Peiyue,
Luo Xingdong,
Lyu Bosai,
Deng Aolin,
Hu Cheng,
Chen Jiajun,
Shi Zhiwen
Publication year - 2020
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201900923
Subject(s) - polariton , materials science , reflection (computer programming) , classification of discontinuities , wavelength , scaling , graphene , hexagonal boron nitride , condensed matter physics , optics , optoelectronics , nanotechnology , physics , geometry , mathematical analysis , mathematics , computer science , programming language
Abstract Polaritons in low‐dimensional materials have shown their unique capabilities to concentrate light at the deep subwavelength scale. They behave quite differently from those in conventional metals. On the one hand, the strongly confined polaritons exhibit a large tunability in wavelength following different scaling behaviors in different systems. On the other hand, they show novel reflection behaviors when they encounter topographic boundaries or electronic discontinuities. Here, recent progress on the scaling and reflection behaviors of strongly confined polaritons in three representative low‐dimensional material systems is reviewed. It is shown that the polariton wavelength changes sensitively with carrier density, thickness, and the number of conducting channels for graphene, hexagonal boron nitride, and carbon nanotubes. Also, it is demonstrated how polaritons reflect in low‐dimensional materials when encountering edges, corrugations, domain walls, strain regions, etc.