Infrared selective emitters with thin films of polar materials

Narayanaswamy, Arvind; Mayo, Jeff; Canetta, Carlo

doi:10.1063/1.4875699

Cited by 29 publications

(28 citation statements)

References 46 publications

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“…Thin film of pure SiC exhibits emission peaks at λ SiC n ≈ 10.33 µm and λ SiC n ≈ 13 µm. λ n is the wavelength at which the real part of the refractive index becomes zero (zero-index material) [6,32]. λ κ is the wavelength at which the real part of refractive index (n) is large while the imaginary part of refractive index (κ) is small [6].…”

Section: Resultsmentioning

confidence: 99%

“…λ n is the wavelength at which the real part of the refractive index becomes zero (zero-index material) [6,32]. λ κ is the wavelength at which the real part of refractive index (n) is large while the imaginary part of refractive index (κ) is small [6]. These peaks are attributed to the presence of SPhPs, and the characteristic wavelengths of the dielectric function of SiC.…”

Section: Resultsmentioning

confidence: 99%

“…It has been shown that one-dimensional (1-D) metallo-dielectric periodic structures display great selective emission properties in the infrared and visible regions [5]. Multilayered structures of thin films (1-D photonic crystals) of polar materials can also be used to develop selective emitters [6]. The property of multilayered structures to exhibit wavelength selectivity can be explained by the presence of surface phonon polaritons (SPhPs) for polar materials and surface plasmon polaritons (SPPs) for metals [5,7].…”

Section: Introductionmentioning

confidence: 99%

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Thermal Radiative Wavelength Selectivity of Nanostructured Layered Media

Zheng¹

2017

Nanoscaled Films and Layers

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Thermal radiative transport yields unique thermal characteristics of microscopic thin films-wavelength selectivity. This chapter focuses on a methodology about adjusting the wavelength selectivity of thin films embedded with nanoparticles in the far-field and near-field regimes. For nanostructured layered media doped with nanoparticles, Maxwell-Garnett-Mie theory is applied to determine the effective dielectric function for the calculation of radiative thermal transport. The thermal radiative wavelength selectivity can be affected by volume fraction and/or the size of the embedded nanoparticles in thin films. To characterize wavelength selectivity and optical property of nanostructured materials, both real and imaginary parts of effective refractive index need to be analyzed. It has been shown that the nanoparticles made of polar or metallic materials have different influence on thermal radiative wavelength selectivity of microscopic thin films.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal Radiative Wavelength Selectivity of Nanostructured Layered Media

Zheng¹

2017

Nanoscaled Films and Layers

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“…These characteristics could be exploited in many potential nanotechnological applications such as nanoparticles [23][24][25][26] and wavelength selective absorber and emitters. [27][28][29][30][31] Fluctuations in electromagnetic fields due to the presence of boundaries create van der Waals pressures which lead to momentum transfer. [32][33][34][35] These phenomena can be described by cross-spectral densities of the electromagnetic field using dyadic Green's functions of vector Helmholtz equation.…”

Section: Introductionmentioning

confidence: 99%

Radiative energy and momentum transfer for various spherical shapes: A single sphere, a bubble, a spherical shell, and a coated sphere

Zheng

Ghanekar

2015

Journal of Applied Physics

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Enhanced electro-magnetic energy transfer between a hot and cold body at close spacing due to evanescent fields AIP Conf.We use fluctuational electrodynamics to determine spectral emissivity and van der Waals contribution to surface energy for various spherical shapes, such as a sphere, a bubble, a spherical shell, and a coated sphere, in a homogeneous and isotropic medium. The dyadic Green's function formalism of radiative energy and fluctuation-induced van der Waals stress for different spherical configurations has been developed. We show (1) emission spectra of micro-and nano-sized single and coated spheres display several emissivity sharp peaks as the size of object reduces and (2) surface energy becomes size dependent due to van der Waals phenomena when size of object is reduced to a nanoscopic length scale. V C 2015 AIP Publishing LLC.

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“…These photon states include guided modes in thin films [62,75,80,[105][106][107], fibers and nanowires [108][109][110][111], trapped modes and localized polariton modes of optical micro-and nano-cavities [59,62,81,[112][113][114][115], and photonic crystal defect modes [116,117]. Thermal emission extraction via engineering photon LDOS in micro/nanostructures builds upon the obvious parallels with the electronic DOS engineering in quantum wells, wires, and dots [62,105].…”

Section: The Role Of Electron and Photon Densities Of States And The mentioning

confidence: 99%

Heat meets light on the nanoscale

et al. 2016

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Abstract:We discuss the state-of-the-art and remaining challenges in the fundamental understanding and technology development for controlling light-matter interactions in nanophotonic environments in and away from thermal equilibrium. The topics covered range from the basics of the thermodynamics of light emission and absorption to applications in solar thermal energy generation, thermophotovoltaics, optical refrigeration, personalized cooling technologies, development of coherent incandescent light sources, and spinoptics.Keywords: thermal emission; absorption; spectral selectivity; angular selectivity; optical refrigeration; solar thermal energy conversion; thermophotovoltaics; nearfield heat transfer; photon density of states; thermal upconversion; radiative cooling Thermodynamics of light and heatControl and optimization of energy conversion processes involving photon absorption and radiation require detailed understanding of thermodynamic properties of radiation as well as its interaction with matter [1-5]. Historically, thermodynamic treatment of electromagnetic radiation began over a century ago with Planck applying the thermodynamic principles established for a gas of material particles to an analogous "photon gas" [1]. In particular, he showed that thermodynamic parameters, such as the energy, volume, temperature, and pressure can be applied to electromagnetic radiation, reflecting the dual wave-particle nature of photons. In this section, we will review the general thermodynamic principles governing photon propagation and interaction with matter, as well

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Infrared selective emitters with thin films of polar materials

Cited by 29 publications

References 46 publications

Thermal Radiative Wavelength Selectivity of Nanostructured Layered Media

Thermal Radiative Wavelength Selectivity of Nanostructured Layered Media

Radiative energy and momentum transfer for various spherical shapes: A single sphere, a bubble, a spherical shell, and a coated sphere

Heat meets light on the nanoscale

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