Tunable plasmon-phonon polaritons in anisotropic 2D materials on hexagonal boron nitride

Hodjat Hajian; Ekmel Ozbay; Ivan D. Rukhlenko; George W. Hanson; Tony Low; Bayram Butun

doi:10.1515/nanoph-2020-0080

Tunable plasmon-phonon polaritons in anisotropic 2D materials on hexagonal boron nitride

Hodjat Hajian, Ekmel Ozbay, Ivan D. Rukhlenko, George W. Hanson, Tony Low, Bayram Butun

Electrical and Computer Engineering

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

27 Scopus citations

Abstract

Mid-infrared (MIR) plasmon-phonon features of heterostructures composing of a plasmonic anisotropic two-dimensional material (A2DM) on a hexagonal boron nitride (hBN) film are analyzed. We derive the exact dispersion relations of plasmon-phonons supported by the heterostructures and demonstrate the possibility of topological transitions of these modes within the second Reststrahlen band of hBN. The topological transitions lead to enhanced local density of plasmon-phonon states, which intensifies the spontaneous emission rate, if the thickness of the hBN layer is appropriately chosen. We also investigate a lateral junction formed by A2DM/hBN and A2DM, demonstrating that one can realize asymmetric guiding, beaming, and unidirectionality of the hybrid guided modes. Our findings demonstrate potential capabilities of the A2DM/hBN heterostructures for active tunable light-matter interactions and asymmetric in-plane polariton nanophotonics in the MIR range.

Original language	English (US)
Pages (from-to)	3909-3920
Number of pages	12
Journal	Nanophotonics
Volume	9
Issue number	12
DOIs	https://doi.org/10.1515/nanoph-2020-0080
State	Published - Sep 1 2020

Bibliographical note

Funding Information:
Authors acknowledge financial support from DPT-HAMIT and TUBITAK projects under Nos. 113E331 and 109E301, and the Russian Science Foundation (Grant No. 19-13-00332). One of the authors (E.O.) also acknowledges partial support from the Turkish Academy of Sciences.

Publisher Copyright:
© 2020 Hodjat Hajian et al., published by De Gruyter. International License.

Keywords

2D materials
Hexagonal boron nitride
Hyperbolic
In-plane anisotropy
Polaritons
Topology

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10.1515/nanoph-2020-0080

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title = "Tunable plasmon-phonon polaritons in anisotropic 2D materials on hexagonal boron nitride",

abstract = "Mid-infrared (MIR) plasmon-phonon features of heterostructures composing of a plasmonic anisotropic two-dimensional material (A2DM) on a hexagonal boron nitride (hBN) film are analyzed. We derive the exact dispersion relations of plasmon-phonons supported by the heterostructures and demonstrate the possibility of topological transitions of these modes within the second Reststrahlen band of hBN. The topological transitions lead to enhanced local density of plasmon-phonon states, which intensifies the spontaneous emission rate, if the thickness of the hBN layer is appropriately chosen. We also investigate a lateral junction formed by A2DM/hBN and A2DM, demonstrating that one can realize asymmetric guiding, beaming, and unidirectionality of the hybrid guided modes. Our findings demonstrate potential capabilities of the A2DM/hBN heterostructures for active tunable light-matter interactions and asymmetric in-plane polariton nanophotonics in the MIR range.",

keywords = "2D materials, Hexagonal boron nitride, Hyperbolic, In-plane anisotropy, Polaritons, Topology",

author = "Hodjat Hajian and Ekmel Ozbay and Rukhlenko, {Ivan D.} and Hanson, {George W.} and Tony Low and Bayram Butun",

note = "Funding Information: Authors acknowledge financial support from DPT-HAMIT and TUBITAK projects under Nos. 113E331 and 109E301, and the Russian Science Foundation (Grant No. 19-13-00332). One of the authors (E.O.) also acknowledges partial support from the Turkish Academy of Sciences. Publisher Copyright: {\textcopyright} 2020 Hodjat Hajian et al., published by De Gruyter. International License.",

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AU - Hajian, Hodjat

AU - Ozbay, Ekmel

AU - Rukhlenko, Ivan D.

AU - Hanson, George W.

AU - Low, Tony

AU - Butun, Bayram

N1 - Funding Information: Authors acknowledge financial support from DPT-HAMIT and TUBITAK projects under Nos. 113E331 and 109E301, and the Russian Science Foundation (Grant No. 19-13-00332). One of the authors (E.O.) also acknowledges partial support from the Turkish Academy of Sciences. Publisher Copyright: © 2020 Hodjat Hajian et al., published by De Gruyter. International License.

PY - 2020/9/1

Y1 - 2020/9/1

N2 - Mid-infrared (MIR) plasmon-phonon features of heterostructures composing of a plasmonic anisotropic two-dimensional material (A2DM) on a hexagonal boron nitride (hBN) film are analyzed. We derive the exact dispersion relations of plasmon-phonons supported by the heterostructures and demonstrate the possibility of topological transitions of these modes within the second Reststrahlen band of hBN. The topological transitions lead to enhanced local density of plasmon-phonon states, which intensifies the spontaneous emission rate, if the thickness of the hBN layer is appropriately chosen. We also investigate a lateral junction formed by A2DM/hBN and A2DM, demonstrating that one can realize asymmetric guiding, beaming, and unidirectionality of the hybrid guided modes. Our findings demonstrate potential capabilities of the A2DM/hBN heterostructures for active tunable light-matter interactions and asymmetric in-plane polariton nanophotonics in the MIR range.

AB - Mid-infrared (MIR) plasmon-phonon features of heterostructures composing of a plasmonic anisotropic two-dimensional material (A2DM) on a hexagonal boron nitride (hBN) film are analyzed. We derive the exact dispersion relations of plasmon-phonons supported by the heterostructures and demonstrate the possibility of topological transitions of these modes within the second Reststrahlen band of hBN. The topological transitions lead to enhanced local density of plasmon-phonon states, which intensifies the spontaneous emission rate, if the thickness of the hBN layer is appropriately chosen. We also investigate a lateral junction formed by A2DM/hBN and A2DM, demonstrating that one can realize asymmetric guiding, beaming, and unidirectionality of the hybrid guided modes. Our findings demonstrate potential capabilities of the A2DM/hBN heterostructures for active tunable light-matter interactions and asymmetric in-plane polariton nanophotonics in the MIR range.

KW - 2D materials

KW - Hexagonal boron nitride

KW - Hyperbolic

KW - In-plane anisotropy

KW - Polaritons

KW - Topology

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Tunable plasmon-phonon polaritons in anisotropic 2D materials on hexagonal boron nitride

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