Low-loss two-dimensional plasmon modes in antimonene

Torbatian, Zahra; Alidoosti, Mohammad; Novko, Dino; Asgari, Reza

doi:10.1103/physrevb.101.205412

Cited by 13 publications

(11 citation statements)

References 51 publications

(57 reference statements)

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“…Optical absorption, phonon-induced damping, and electron excitation spectrum.-In this section, we present a short theoretical description of optical absorption quantities in the long-wavelength limit (q ≈ 0) by making use of the current-current response tensor Π µ (q, ω) calculated within DFT, where the electromagnetic interaction is mediated by the free-photon propagator. The thorough description of the method can be found in our previous works [42,55,56].…”

Section: Methodsmentioning

confidence: 99%

Hyperbolic plasmon modes in tilted Dirac cone phases of borophene

Torbatian,

Novko,

Asgari

2021

Preprint

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Hyperbolic materials are receiving significant attention due to their ability to support electromagnetic fields with arbitrarily high momenta and, hence, to achieve very strong light confinement.Here, based on first-principles calculations and many-body perturbation theory, we explore the characteristic of two-dimensional plasmon modes and its hyperbolic properties for two phases of single layer boron hosting tilted Dirac cone, namely, the hr-sB and 8Pmmn borophene. In-plane anisotropy in borophene is manifested in the structural, electronic, vibrational and optical properties. We find two hyperbolic regimes for both phases of borophene, where the high-energy one is located in the visible range. The hr-sB borophene is characterised with an intrinsic high carrier density and it supports strong hyperbolic plasmon modes in the visible part of the spectrum. The 8Pmmn borophene, on the other hand, resembles the prototypical Dirac material graphene, and upon carrier doping acquires anisotropic Dirac plasmons in the mid-infrared. We have also investigated the impact of the electron-phonon coupling and Landau damping on these hyperbolic plasmon modes. Our results show that borophene, having high anisotropy, intrinsic high carrier concentration, low-loss hyperbolic Dirac plasmon modes, and high confinement can represent a promising candidate for low-loss broad band surface plasmon polariton devices.

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Section: Methodsmentioning

confidence: 99%

Hyperbolic plasmon modes in tilted Dirac cone phases of borophene

Torbatian,

Novko,

Asgari

2021

Preprint

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“…Monolayer WTe2 is a quantum spin-Hall insulator [247] and possesses gate induced superconductivity [248] , while bilayer WTe2 is ferroelectric [249] . Torbatian et al predicted WTe2 single-layer hosts hyperbolic plasmons according to density-functional and many-body perturbation theories [250] . The hyperbolic behavior could be tuned from the FIR to NIR region by chemical doping or strain.…”

Section: Polaritons Of Anisotropic 2d Materialsmentioning

confidence: 99%

Optical properties and polaritons of low symmetry 2D materials

et al. 2023

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Low symmetry 2D materials with intrinsic in-plane anisotropic optical properties and high tunability provide a promising platform to explore and manipulate light-matter interactions. To date, dozens of in-plane anisotropic 2D materials with diverse band structures have been discovered. They exhibit rich optical properties, indicating great potential for novel applications in optics, photonics, and optoelectronics. In this paper, we thoroughly review the anisotropic optical properties and polaritons in many kinds of low symmetry 2D materials, aiming to elicit more research interest in this field. First, the optical properties of anisotropic 2D semiconductors, including interband absorption, photoluminescence, excitons, and band structure engineering for tuning optical responses, are introduced. Then fundamentals and advances in experiments of hyperbolic polaritons in anisotropic 2D materials, including phonon, plasmon, and exciton polaritons, are discussed. Finally, a perspective on promising research directions is given.

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“…It means that in one direction they behave like as a dielectric with a positive permittivity, while in the other direction they reveal metallic feature with negative permittivity. These materials become more noteworthy by considering their tunability via chemical doping, gating and strain [12] or temperature [13]. Some anisotropic 2D materials were predicted to show a hyperbolic surface plasmon polariton, but has not confirmed experimentally yet [14].…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, modulation of the hyperbolicity can be affected by the temperature [15]. It has been shown that as temperature increases the in-plane anisotropy of the optical response of T d − W T e 2 and its hyperbolic regime is changed [12]. This suggests T d − W T e 2 is a perfect and promising hyperbolic material for planar optoelectronics and nanophotonics applications.…”

Section: Introductionmentioning

confidence: 99%

Polarization dependent light propagation in WTe2 multilayer structure

Abdol

Shojaei

Abdollahipour

2023

Preprint

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WTe 2 is one of the exciting and outstanding semimetallic members of TMDCs which has attracted immense attention for manipulating light propagation due to its inherent optical anisotropy and hyperbolic characteristic in the infrared frequency range. We investigate dependence of the reflectance and transmit-tance of a single layer and double layers of WTe2 thin film in terms of frequency and polarization angle of the incident wave. We find rich behaviors in the optical response of these structures due to their anisotropic permittivity tensors. Furthermore, we analyze the polarization rotation of transmitted and reflected waves through these structures. We demonstrate that these structures provide the ability to achieve desired polarization rotation for outgoing waves by tuning the frequency and polarization angle of the incident wave with respect to the principal axes of WTe2 thin film. In particular, we elucidate essential relevance of the optical response and polarization rotation of the double layer structure to the in-plain rotation angle of WTe2 thin films. We explain that this structure permits a comprehensive control of the polarization rotation of the outgoing waves by adjusting the angle between layers. The proposed structure can be employed as an efficient light manipulator with the aim of application in communication, imaging, and information processing.

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Low-loss two-dimensional plasmon modes in antimonene

Cited by 13 publications

References 51 publications

Hyperbolic plasmon modes in tilted Dirac cone phases of borophene

Hyperbolic plasmon modes in tilted Dirac cone phases of borophene

Optical properties and polaritons of low symmetry 2D materials

Polarization dependent light propagation in WTe2 multilayer structure

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