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Universal Formulas for Calculating Emissivity and Integral Radiation Flux Densities of Black Bodies and Subwavelength Particles

  • RADIO PHENOMENA IN SOLIDS AND PLASMA
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Abstract

Universal formulas are derived for calculation of the emissivity and integral densities of radiation fluxes for objects having dimensions much greater than the emitted wavelengths (large objects) and subwavelength objects (particles). An advantage of the proposed calculation method based on the theory of modes is related to an exact relationship of the size, shape and temperature of objects and the emissivity and integral densities of radiation fluxes. In addition, the method is easier to implement and more demonstrative in comparison with alternative techniques.

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Fig. 1.
Fig. 2.

Notes

  1. λmax is the wavelength corresponding to the maximum radiation intensity of black (gray) body heated to temperature T and B is the constant of the Wien displacement formula.

  2. Objects that emit through apertures the dimensions of which are comparable with or less than λmax are studied using the methods that are employed in the study of the SPs with the dimensions of the apertures [8, 11, 12].

  3. Here, large objects are the objects the dimensions of which are significantly greater than λmax.

  4. λcutoff of the ESPs changes when the transverse sizes are changed.

  5. The mean free path is the averaged distance passed by energy carriers prior to collisions (for example, phonon–phonon collisions in insulators or electron–phonon collisions in metals and semiconductors).

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Authors and Affiliations

  1. Federal Scientific Agroengineering Center VIM, 109428, Moscow, Russia

    A. N. Sviridov & L. D. Saginov

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  1. A. N. Sviridov
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  2. L. D. Saginov
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Correspondence to A. N. Sviridov or L. D. Saginov.

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Translated by A. Chikishev

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Sviridov, A.N., Saginov, L.D. Universal Formulas for Calculating Emissivity and Integral Radiation Flux Densities of Black Bodies and Subwavelength Particles. J. Commun. Technol. Electron. 67 (Suppl 1), S91–S96 (2022). https://doi.org/10.1134/S1064226922130095

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  • DOI: https://doi.org/10.1134/S1064226922130095

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