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Title: Nonlocality induced Cherenkov threshold
Authors: Hu, Hao
Lin, Xiao
Zhang, Jingjing
Liu, Dongjue
Genevet, Patrice
Zhang, Baile
Luo, Yu
Keywords: Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Issue Date: 2020
Source: Hu, H., Lin, X., Zhang, J., Liu, D., Genevet, P., Zhang, B. & Luo, Y. (2020). Nonlocality induced Cherenkov threshold. Laser & Photonics Reviews, 14(10), 2000149-.
Project: MOE2018-T2-2-189 (S)
MOE2017-T1-001-239 (RG91/17 (S)
MOE2018-T2-1-022 (S)
RG174/16 (S)
Journal: Laser & Photonics Reviews
Abstract: Cherenkov radiation is generally believed to be threshold-free in hyperbolicmetamaterials owing to the extremely large photonic density of states in classical localframework. Although recent advances in nonlocal and quantum plasmonics extend ourunderstanding of light-matter interactions in metamaterials, how such effects influenceCherenkov radiation in hyperbolic metamaterials still remains unknown. Here, it isdemonstrated that effects of nonlocality add a new degree of freedom to engineerCherenkov thresholds in hyperbolic metamaterials. The interplay between finite structuraldimensions and nonlocal nature of metallic electrons results in a nonzero Cherenkovthreshold. Counterintuitively, such nonlocality-induced Cherenkov threshold can besignificantly smaller than the classically predicted one if the metamaterial is designed to workaround the epsilon-near-zero frequency. This phenomenon is attributed to the excitation oflongitudinal plasmon modes which are absent in classical electromagnetic framework. Thesefindings apply to a general class of hyperbolic materials, including metallodielectric layeredstructures, nanorod/nanoribbon arrays, hyperbolic van der Waals crystals, etc.
ISSN: 1863-8880
DOI: 10.1002/lpor.202000149
DOI (Related Dataset): 10.21979/N9/BOUAM4
Rights: This is the peer reviewed version of the following article: Hu, H., Lin, X., Zhang, J., Liu, D., Genevet, P., Zhang, B. & Luo, Y. (2020). Nonlocality induced Cherenkov threshold. Laser & Photonics Reviews, 14(10), 2000149-, which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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