Thermal graphene metamaterials and epsilon-near-zero high temperature plasmonics

Abstract

The key feature of a thermophotovoltaic (TPV) emitter is the enhancement of thermal emission corresponding to energies just above the bandgap of the absorbing photovoltaic cell and simultaneous suppression of thermal emission below the bandgap. We show here that a single layer plasmonic coating can perform this task with high efficiency. Our key design principle involves tuning the epsilon-near-zero frequency (plasma frequency) of the metal acting as a thermal emitter to the electronic bandgap of the semiconducting cell. This approach utilizes the change in reflectivity of a metal near its plasma frequency (epsilon-near-zero frequency) to lead to spectrally selective thermal emission and can be adapted to large area coatings using high temperature plasmonic materials. We provide a detailed analysis of the spectral and angular performance of high temperature plasmonic coatings as TPV emitters. We show the potential of such high temperature plasmonic thermal emitter coatings (p-TECs) for narrowband near-field thermal emission. We also show the enhancement of near-surface energy density in graphene-multilayer thermal metamaterials due to a topological transition at an effective epsilon-near-zero frequency. This opens up spectrally selective thermal emission from graphene multilayers in the infrared frequency regime. Our design paves the way for the development of single layer p-TECs and graphene multilayers for spectrally selective radiative heat transfer applications.

arXiv comment10 pages, 8 figures

References in corpus (20)

• Ultrahigh electron mobility in suspended graphene
• Graphene plasmonics: A platform for strong light-matter interaction
• Dielectric function, screening, and plasmons in 2D graphene
• Total light absorption in graphene
• Dynamical polarization of graphene at finite doping
• Surface Electromagnetic Waves Thermally Excited: Radiative Heat Transfer, Coherence Properties and Casimir Forces Revisited in the Near Field
• Topological Transitions in Metamaterials
• Novel hyperbolic metamaterials based on multilayer graphene structures
• Thermal infrared emission reveals the Dirac point movement in biased graphene
• Thermal Hyperbolic Metamaterials
• Electronic modulation of infrared emissivity in graphene plasmonic resonators
• Graphene-based photovoltaic cells for near-field thermal energy conversion
• High temperature epsilon-near-zero and epsilon-near-pole metamaterial emitters for thermophotovoltaics
• Strong absorption and selective thermal emission from a mid-infrared metamaterial
• Near-field thermal radiation transfer controlled by plasmons in graphene
• Graphene-on-silicon near-field thermophotovoltaic cell
• Giant radiation heat transfer through the micron gaps
• Ideal near-field thermophotovoltaic cells
• Selective emitters design and optimization for thermophotovoltaic applications
• Thermal excitation of plasmons for near-field thermophotovoltaics

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• Material Scaling and Frequency-Selective Enhancement of Near-Field Radiative Heat Transfer for Lossy Metals in Two Dimensions via Inverse Design
• Dual-Band Quasi-Coherent Radiative Thermal Source
• Spectral domain inverse design for accelerating nanocomposite metamaterials discovery