Mid-infrared analogue polaritonic reversed Cherenkov radiation in natural anisotropic crystals

Xiangdong Guo; Chenchen Wu; Shu Zhang; Debo Hu; Shunping Zhang; Qiao Jiang; Xiaokang Dai; Yu Duan; Xiaoxia Yang; Zhipei Sun; Shuang Zhang; Hongxing Xu; Qing Dai

doi:10.1038/s41467-023-37923-w

Mid-infrared analogue polaritonic reversed Cherenkov radiation in natural anisotropic crystals

Xiangdong Guo
, Chenchen Wu
, Shu Zhang
, Debo Hu
, Shunping Zhang
, Qiao Jiang
, Xiaokang Dai
, Yu Duan
, Xiaoxia Yang^*
, Zhipei Sun
, Shuang Zhang
, Hongxing Xu
, Qing Dai^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

33 Citations (Scopus)

63 Downloads (Pure)

Abstract

Cherenkov radiation (CR) excited by fast charges can serve as on-chip light sources with a nanoscale footprint and broad frequency range. The reversed CR, which usually occurs in media with the negative refractive index or negative group-velocity dispersion, is highly desired because it can effectively separate the radiated light from fast charges thanks to the obtuse radiation angle. However, reversed CR at the mid-infrared remains challenging due to the significant loss of conventional artificial structures. Here we observe mid-infrared analogue polaritonic reversed CR in a natural van der Waals (vdW) material (i.e., α-MoO₃), whose hyperbolic phonon polaritons exhibit negative group velocity. Further, the real-space image results of analogue polaritonic reversed CR indicate that the radiation distributions and angles are closely related to the in-plane isofrequency contours of α-MoO₃, which can be further tuned in the heterostructures based on α-MoO₃. This work demonstrates that natural vdW heterostructures can be used as a promising platform of reversed CR to design on-chip mid-infrared nano-light sources.

Original language	English
Article number	2532
Journal	Nature Communications
Volume	14
Issue number	1
DOIs	https://doi.org/10.1038/s41467-023-37923-w
Publication status	Published - Dec 2023
MoE publication type	A1 Journal article-refereed

Funding

This work was supported by the National Key R&D Program of China (2021YFA1201500), the National Natural Science Foundation of China (51925203, 52022025, 52102160, 51972074, and U2032206), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB36000000 and XDB30000000), Youth Innovation Promotion Association C.A.S., C.A.S. Interdisciplinary Innovation Team (JCTD-2018-03), the Open Project of Nanjing University (M34034), the Special Research Assistant Program of the Chinese Academy of Sciences, the Young Elite Scientists Sponsorship Program by CAST (2022QNRC001), the Research Grants Council of Hong Kong (AoE/P- 701/20, 17309021), Academy of Finland (314810, 333982, 336144, 352780, 352930, and 353364), the Academy of Finland Flagship Programme (320167,PREIN), the EU H2020-MSCA-RISE-872049 (IPN-Bio), and ERC (834742).

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10.1038/s41467-023-37923-wLicence: CC BY

s41467-023-37923-w (1)Final published version, 1.29 MBLicence: CC BY

Cite this

@article{2b479a5f1aec49289070b16f18419557,

title = "Mid-infrared analogue polaritonic reversed Cherenkov radiation in natural anisotropic crystals",

abstract = "Cherenkov radiation (CR) excited by fast charges can serve as on-chip light sources with a nanoscale footprint and broad frequency range. The reversed CR, which usually occurs in media with the negative refractive index or negative group-velocity dispersion, is highly desired because it can effectively separate the radiated light from fast charges thanks to the obtuse radiation angle. However, reversed CR at the mid-infrared remains challenging due to the significant loss of conventional artificial structures. Here we observe mid-infrared analogue polaritonic reversed CR in a natural van der Waals (vdW) material (i.e., α-MoO3), whose hyperbolic phonon polaritons exhibit negative group velocity. Further, the real-space image results of analogue polaritonic reversed CR indicate that the radiation distributions and angles are closely related to the in-plane isofrequency contours of α-MoO3, which can be further tuned in the heterostructures based on α-MoO3. This work demonstrates that natural vdW heterostructures can be used as a promising platform of reversed CR to design on-chip mid-infrared nano-light sources.",

author = "Xiangdong Guo and Chenchen Wu and Shu Zhang and Debo Hu and Shunping Zhang and Qiao Jiang and Xiaokang Dai and Yu Duan and Xiaoxia Yang and Zhipei Sun and Shuang Zhang and Hongxing Xu and Qing Dai",

note = "Funding Information: This work was supported by the National Key R\&D Program of China (2021YFA1201500), the National Natural Science Foundation of China (51925203, 52022025, 52102160, 51972074, and U2032206), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB36000000 and XDB30000000), Youth Innovation Promotion Association C.A.S., C.A.S. Interdisciplinary Innovation Team (JCTD-2018-03), the Open Project of Nanjing University (M34034), the Special Research Assistant Program of the Chinese Academy of Sciences, the Young Elite Scientists Sponsorship Program by CAST (2022QNRC001), the Research Grants Council of Hong Kong (AoE/P- 701/20, 17309021), Academy of Finland (314810, 333982, 336144, 352780, 352930, and 353364), the Academy of Finland Flagship Programme (320167,PREIN), the EU H2020-MSCA-RISE-872049 (IPN-Bio), and ERC (834742). Publisher Copyright: {\textcopyright} 2023, The Author(s). | openaire: EC/H2020/834742/EU//ATOP",

year = "2023",

month = dec,

doi = "10.1038/s41467-023-37923-w",

language = "English",

volume = "14",

journal = "Nature Communications",

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AU - Guo, Xiangdong

AU - Wu, Chenchen

AU - Zhang, Shu

AU - Hu, Debo

AU - Zhang, Shunping

AU - Jiang, Qiao

AU - Dai, Xiaokang

AU - Duan, Yu

AU - Yang, Xiaoxia

AU - Sun, Zhipei

AU - Zhang, Shuang

AU - Xu, Hongxing

AU - Dai, Qing

N1 - Funding Information: This work was supported by the National Key R&D Program of China (2021YFA1201500), the National Natural Science Foundation of China (51925203, 52022025, 52102160, 51972074, and U2032206), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB36000000 and XDB30000000), Youth Innovation Promotion Association C.A.S., C.A.S. Interdisciplinary Innovation Team (JCTD-2018-03), the Open Project of Nanjing University (M34034), the Special Research Assistant Program of the Chinese Academy of Sciences, the Young Elite Scientists Sponsorship Program by CAST (2022QNRC001), the Research Grants Council of Hong Kong (AoE/P- 701/20, 17309021), Academy of Finland (314810, 333982, 336144, 352780, 352930, and 353364), the Academy of Finland Flagship Programme (320167,PREIN), the EU H2020-MSCA-RISE-872049 (IPN-Bio), and ERC (834742). Publisher Copyright: © 2023, The Author(s). | openaire: EC/H2020/834742/EU//ATOP

PY - 2023/12

Y1 - 2023/12

N2 - Cherenkov radiation (CR) excited by fast charges can serve as on-chip light sources with a nanoscale footprint and broad frequency range. The reversed CR, which usually occurs in media with the negative refractive index or negative group-velocity dispersion, is highly desired because it can effectively separate the radiated light from fast charges thanks to the obtuse radiation angle. However, reversed CR at the mid-infrared remains challenging due to the significant loss of conventional artificial structures. Here we observe mid-infrared analogue polaritonic reversed CR in a natural van der Waals (vdW) material (i.e., α-MoO3), whose hyperbolic phonon polaritons exhibit negative group velocity. Further, the real-space image results of analogue polaritonic reversed CR indicate that the radiation distributions and angles are closely related to the in-plane isofrequency contours of α-MoO3, which can be further tuned in the heterostructures based on α-MoO3. This work demonstrates that natural vdW heterostructures can be used as a promising platform of reversed CR to design on-chip mid-infrared nano-light sources.

AB - Cherenkov radiation (CR) excited by fast charges can serve as on-chip light sources with a nanoscale footprint and broad frequency range. The reversed CR, which usually occurs in media with the negative refractive index or negative group-velocity dispersion, is highly desired because it can effectively separate the radiated light from fast charges thanks to the obtuse radiation angle. However, reversed CR at the mid-infrared remains challenging due to the significant loss of conventional artificial structures. Here we observe mid-infrared analogue polaritonic reversed CR in a natural van der Waals (vdW) material (i.e., α-MoO3), whose hyperbolic phonon polaritons exhibit negative group velocity. Further, the real-space image results of analogue polaritonic reversed CR indicate that the radiation distributions and angles are closely related to the in-plane isofrequency contours of α-MoO3, which can be further tuned in the heterostructures based on α-MoO3. This work demonstrates that natural vdW heterostructures can be used as a promising platform of reversed CR to design on-chip mid-infrared nano-light sources.

UR - https://www.scopus.com/pages/publications/85158019691

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DO - 10.1038/s41467-023-37923-w

M3 - Article

C2 - 37137873

AN - SCOPUS:85158019691

SN - 2041-1723

VL - 14

JO - Nature Communications

JF - Nature Communications

IS - 1

M1 - 2532

ER -

Mid-infrared analogue polaritonic reversed Cherenkov radiation in natural anisotropic crystals

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BRIGHT: Bioottisten vahinkojen kartoitus erittäin laajan spektrialueen LiDAR:illa kestävää metsänkasvua varten

Bio-Base: Biomaterial-based photonics and optoelectronics for sustainable ICT systems

FAST: Ultrafast Data Production with Broadband Photodetectors for Active Hyperspectral Space Imaging

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Mid-infrared analogue polaritonic reversed Cherenkov radiation in natural anisotropic crystals

Abstract

Funding

Access to Document

Other files and links

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BRIGHT: Bioottisten vahinkojen kartoitus erittäin laajan spektrialueen LiDAR:illa kestävää metsänkasvua varten

Bio-Base: Biomaterial-based photonics and optoelectronics for sustainable ICT systems

FAST: Ultrafast Data Production with Broadband Photodetectors for Active Hyperspectral Space Imaging

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