Nonlinear optical response of type-II Weyl fermions in two dimensions

Yaraslau Tamashevich; Leone Di Mauro Villari; Marco Ornigotti

doi:10.1103/PhysRevB.105.195102

Nonlinear optical response of type-II Weyl fermions in two dimensions

Yaraslau Tamashevich, Leone Di Mauro Villari, Marco Ornigotti

Physics

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Abstract

We present a theoretical model to study the nonlinear optical response of materials with a low-energy spectrum characterized by strongly tilted, type-II Weyl cones in two dimensions, which we call 2D Weyl materials. Our findings reveal that the tilted nature of the Weyl cones is responsible for the appearance of even harmonics in the nonlinear signal, as well as its strong polarization dependence. We discuss how it is possible to control such a nonlinear response and envision how 2D Weyl materials can be used to realize different photonic devices for sensing applications.

Original language	English
Article number	195102
Journal	Physical Review B
Volume	105
Issue number	19
DOIs	https://doi.org/10.1103/PhysRevB.105.195102
Publication status	Published - 15 May 2022
Publication type	A1 Journal article-refereed

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Publication forum level 2

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Nonlinear optical response of type-II Weyl fermions in two dimensions",

abstract = "We present a theoretical model to study the nonlinear optical response of materials with a low-energy spectrum characterized by strongly tilted, type-II Weyl cones in two dimensions, which we call 2D Weyl materials. Our findings reveal that the tilted nature of the Weyl cones is responsible for the appearance of even harmonics in the nonlinear signal, as well as its strong polarization dependence. We discuss how it is possible to control such a nonlinear response and envision how 2D Weyl materials can be used to realize different photonic devices for sensing applications.",

author = "Yaraslau Tamashevich and Villari, {Leone Di Mauro} and Marco Ornigotti",

note = "Funding Information: Y.T. and M.O. acknowledge the financial support of the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), Decision No. 320165. Y.T. also acknowledges support from the Finnish Cultural Foundation, Decision No. 00221008. L.D.M.V. acknowledges support from the European Commission under the EU Horizon 2020 MSCA-RISE-2019 programme (Project No. 873028 HYDROTRONICS) and of the Leverhulme Trust under Grant No. RPG-2019-363. Publisher Copyright: {\textcopyright} 2022 American Physical Society.",

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AU - Villari, Leone Di Mauro

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N1 - Funding Information: Y.T. and M.O. acknowledge the financial support of the Academy of Finland Flagship Programme, Photonics Research and Innovation (PREIN), Decision No. 320165. Y.T. also acknowledges support from the Finnish Cultural Foundation, Decision No. 00221008. L.D.M.V. acknowledges support from the European Commission under the EU Horizon 2020 MSCA-RISE-2019 programme (Project No. 873028 HYDROTRONICS) and of the Leverhulme Trust under Grant No. RPG-2019-363. Publisher Copyright: © 2022 American Physical Society.

PY - 2022/5/15

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N2 - We present a theoretical model to study the nonlinear optical response of materials with a low-energy spectrum characterized by strongly tilted, type-II Weyl cones in two dimensions, which we call 2D Weyl materials. Our findings reveal that the tilted nature of the Weyl cones is responsible for the appearance of even harmonics in the nonlinear signal, as well as its strong polarization dependence. We discuss how it is possible to control such a nonlinear response and envision how 2D Weyl materials can be used to realize different photonic devices for sensing applications.

AB - We present a theoretical model to study the nonlinear optical response of materials with a low-energy spectrum characterized by strongly tilted, type-II Weyl cones in two dimensions, which we call 2D Weyl materials. Our findings reveal that the tilted nature of the Weyl cones is responsible for the appearance of even harmonics in the nonlinear signal, as well as its strong polarization dependence. We discuss how it is possible to control such a nonlinear response and envision how 2D Weyl materials can be used to realize different photonic devices for sensing applications.

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DO - 10.1103/PhysRevB.105.195102

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JO - Physical Review B

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Nonlinear optical response of type-II Weyl fermions in two dimensions

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