Gate voltage and doping effects on near-field radiation heat transfer in plasmonic heterogeneous pairs of graphene and black phosphorene

Debu, Desalegn T.; Doha, M. Hasan; Churchill, Hugh; Herzog, Joseph B.

doi:10.1039/c9ra04695j

Cited by 6 publications

(3 citation statements)

References 60 publications

(72 reference statements)

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“…The particular physical properties of 2D materials have also attracted attention for their possible use in NFRHT. , Graphene has been widely studied for that purpose. , It can, for instance, be used to suppress heat transfer by rotating two plates at magic angles ,, or be used as buffers on structured surfaces. Heat radiation between graphene and hexagonal boron nitride (hBN) , has been shown to be useful by combining the surface response of each material as well as graphene and hexagonal boron nitride (hBN) structures . Recently, we studied the thermal radiation properties between β-GeSe monolayers using a combination of density functional theory (DFT) and Rytov’s theory of fluctuation electrodynamics .…”

Section: Introductionmentioning

confidence: 99%

Near-Field Radiative Heat Transfer between Layered β-GeSe Slabs: First-Principles Approach

Gusso,

Sánchez-Ochoa,

Esquivel-Sirvent

2024

Langmuir

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The group-IV monochalcogenide monolayers, GeSe, are interesting and novel two-dimensional (2D) semiconductor materials due to their highly anisotropic physical properties. Monolayers of the different GeSe polymorphs have already had their physical properties and potential applications extensively investigated. However, few-layer homostructures, which can also be approximated as 2D systems in many cases, have not received the same attention. For this reason, in this work, we investigate the optical properties of a free-standing few-layer β-GeSe system and use this information to investigate their performance in the near-field radiative heat transfer (NFRHT). The required optical conductivity of the few-layer 2D material is calculated by using density functional theory (DFT), including spin–orbit coupling. The band structure is investigated for up to five layers, and the effective electron masses are calculated correspondingly. Using this information, both the intraband transitions due to the presence of free electrons introduced by doping and the interband transitions are considered. The contribution of the ionic vibrations is also included in calculating the optical properties because of its relevance to NFRHT through the resulting active optical phonons. With all these contributions included, more realistic predictions of the NFRHT between the layered 2D β-GeSe materials can be obtained. It is found that the heat transfer attainable with the layered system is similar to that of a single layer of β-GeSe we have obtained previously.

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Section: Introductionmentioning

confidence: 99%

Near-Field Radiative Heat Transfer between Layered β-GeSe Slabs: First-Principles Approach

Gusso,

Sánchez-Ochoa,

Esquivel-Sirvent

2024

Langmuir

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“…Graphene is a great candidate for NFRHT applications as it supports SPPs in the infrared region, and the spectral location of the SPP modes can significantly be tuned by changing the chemical potential of graphene via applying a bias voltage. So far, graphene has been proposed for heat transfer enhancement , active control and switching of radiative heat transfer [18,21,27,29,31,[35][36][37][38][39][40][41][42], thermophotovoltaic power generation [37,43,44], heat transfer suppression [8,17,33], ultrafast modulation of heat transfer [45], and active control of the direction of heat flow [46].…”

Section: Introductionmentioning

confidence: 99%

“…Most of the theoretical studies on graphene's NFRHT are based on using the local Kubo [5][6][7][8][9][10][11][12][13][14][15][16][17][18]20,22,[24][25][26][27][28][29][32][33][34][35][36][37][38][40][41][42][43][44][45] and Drude [19,23,30] models for the electrical conductivity of graphene. These two local models are obtained by making several simplifying assumptions as will be discussed in Section III.…”

Section: Introductionmentioning

confidence: 99%

Effect of nonlocal electrical conductivity on near-field radiative heat transfer between graphene sheets

2022

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Graphene's near-field radiative heat transfer is determined from its electrical conductivity, which is commonly modeled using the local (wavevector independent) Kubo and Drude formulas. In this letter, we analyze the non-locality of the graphene electrical conductivity using the Lindhard model combined with the Mermin relaxation time approximation. We also study how the variation of the electrical conductivity with the wavevector affects near-field radiative conductance between two graphene sheets separated by a vacuum gap. It is shown that the variation of the electrical conductivity with the wavevector, 𝑘 𝜌 , is appreciable for 𝑘 𝜌 s greater than 100𝑘 0 , where 𝑘 0 is the magnitude of the wavevector in the free space. The Kubo model is obtained by assuming 𝑘 𝜌 → 0, and thus is not valid for 𝑘 𝜌 > 100𝑘 0 . The Kubo electrical conductivity provides an accurate estimation of the spectral radiative conductance between two graphene sheets except for around the surface-plasmon-polariton frequency of graphene and at separation gaps smaller than 20 nm where there is a non-negligible contribution from electromagnetic modes with 𝑘 𝜌 > 100𝑘 0 to the radiative conductance. The Drude formula proves to be inaccurate for modeling the electrical conductivity and radiative conductance of graphene except for at temperatures much below the Fermi temperature and frequencies much smaller than 2𝜇 𝑐 ℏ , where 𝜇 𝑐 and ℏ are the chemical potential and reduced Planck's constant, respectively. It is also shown that the electronic scattering

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Highly Efficient Graphene-Based Optical Components for Networking Applications

Soroosh

Farmani

Maleki

et al. 2023

Springer Tracts in Electrical and Electronics Engineering

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Gate voltage and doping effects on near-field radiation heat transfer in plasmonic heterogeneous pairs of graphene and black phosphorene

Abstract: Plasmon coupling and hybridization in 2D materials plays a significant role for controlling light–matter interaction at the nanoscale.

Cited by 6 publications

References 60 publications

Near-Field Radiative Heat Transfer between Layered β-GeSe Slabs: First-Principles Approach

Near-Field Radiative Heat Transfer between Layered β-GeSe Slabs: First-Principles Approach

Effect of nonlocal electrical conductivity on near-field radiative heat transfer between graphene sheets

Highly Efficient Graphene-Based Optical Components for Networking Applications

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