Thermal Radiation

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Jonathan P. Dowling - One of the best experts on this subject based on the ideXlab platform.

  • Thermal Radiation in photonic crystals
    Physical Review B, 2007
    Co-Authors: Marian Florescu, Kurt Busch, Jonathan P. Dowling
    Abstract:

    We analyze the properties of Thermal Radiation in photonic crystals and show that the spectral energy density, the spectral intensity, and the spectral hemispherical power are only limited by the total number of available photonic states and their propagation characteristics. In addition, we show that the central quantity that determines these Thermal Radiation characteristics is the area of the isofrequency surfaces and not the photonic density of states as it is generally assumed. Through the presence of partial or complete photonic band gaps and the associated spectral and angular redistribution of photonic states, it is possible to have spectral regions over which the Thermal Radiation intensity is enhanced relative to the free space blackbody limit and propagation directions along which Thermal photon focusing effects appear.

Yimin Xuan - One of the best experts on this subject based on the ideXlab platform.

  • an overview of micro nanoscaled Thermal Radiation and its applications
    Photonics and Nanostructures: Fundamentals and Applications, 2014
    Co-Authors: Yimin Xuan
    Abstract:

    Abstract With the rapid development of micro/nanoscaled technologies, we are confronted with more and more challenges related to small-scale Thermal Radiation. Thorough understanding and handling of micro/nanoscaled radiative heat transfer is vital for many fields of modern science and technology. For example, proper utilization of near-field Thermal Radiation phenomenon greatly improves light-electric conversion efficiency. This review introduces theoretical and experimental investigation on near-field Thermal Radiation, especially progress in application and control of micro/nanoscaled radiative heat transfer, which addresses problems in developing renewable and sustainable energy techniques.

  • An overview of micro/nanoscaled Thermal Radiation and its applications
    Photonics and Nanostructures - Fundamentals and Applications, 2014
    Co-Authors: Yimin Xuan
    Abstract:

    Abstract With the rapid development of micro/nanoscaled technologies, we are confronted with more and more challenges related to small-scale Thermal Radiation. Thorough understanding and handling of micro/nanoscaled radiative heat transfer is vital for many fields of modern science and technology. For example, proper utilization of near-field Thermal Radiation phenomenon greatly improves light-electric conversion efficiency. This review introduces theoretical and experimental investigation on near-field Thermal Radiation, especially progress in application and control of micro/nanoscaled radiative heat transfer, which addresses problems in developing renewable and sustainable energy techniques.

Gang Chen - One of the best experts on this subject based on the ideXlab platform.

  • Thermal Radiation in 1D photonic crystals
    Journal of Quantitative Spectroscopy & Radiative Transfer, 2004
    Co-Authors: Arvind Narayanaswamy, Gang Chen
    Abstract:

    Abstract Optical properties of periodic structures, or photonic crystals, have been studied extensively over the last two decades. While Thermal Radiation from surface grating structures has also been investigated, Radiation inside a photonic crystal has not been investigated completely. We have developed a method to analyze Thermal Radiation in 1D periodic layered media using a modified dyadic Green's function method and the fluctuation–dissipation theorem. Using the method, Thermal Radiation between layers in periodic structures made of ultra-thin metallic films is analyzed. The unusual features of Thermal Radiation in such structures are explained.

Marian Florescu - One of the best experts on this subject based on the ideXlab platform.

  • Properties of Thermal Radiation in photonic crystals
    Journal of Optics A: Pure and Applied Optics, 2009
    Co-Authors: Marian Florescu, Kurt Busch
    Abstract:

    We analyze the properties of the Thermal Radiation in photonic crystals and show that the spectral energy density, the spectral intensity, and the spectral hemispherical power are only limited by the total number of photonic states available. Due to the possible presence of photonic band gaps and the associated spectral redistribution of photonic states, it is possible to have spectral regions over which the Thermal Radiation generation and propagation are completely inhibited or strongly enhanced relative to the corresponding free space or homogeneous dielectric medium blackbody limits. Using a differential geometry approach, we also investigate the directional properties of the Thermal Radiation propagation in photonic crystals and analyze the Thermal photon focusing effects that take place in these systems.

  • Thermal Radiation in photonic crystals
    Physical Review B, 2007
    Co-Authors: Marian Florescu, Kurt Busch, Jonathan P. Dowling
    Abstract:

    We analyze the properties of Thermal Radiation in photonic crystals and show that the spectral energy density, the spectral intensity, and the spectral hemispherical power are only limited by the total number of available photonic states and their propagation characteristics. In addition, we show that the central quantity that determines these Thermal Radiation characteristics is the area of the isofrequency surfaces and not the photonic density of states as it is generally assumed. Through the presence of partial or complete photonic band gaps and the associated spectral and angular redistribution of photonic states, it is possible to have spectral regions over which the Thermal Radiation intensity is enhanced relative to the free space blackbody limit and propagation directions along which Thermal photon focusing effects appear.

Weijia Zhou - One of the best experts on this subject based on the ideXlab platform.

  • Non-Thermal Radiation heating synthesis of nanomaterials
    Science Bulletin, 2020
    Co-Authors: Guowei Xiong, Jin Jia, Lili Zhao, Xiaoyan Liu, Xiao Li Zhang, Hong Liu, Weijia Zhou
    Abstract:

    Abstract The nanoscale effect enables the unique magnetic, optical, Thermal and electrical properties of nanostructured materials and has attracted extensive investigation for applications in catalysis, biomedicine, sensors, and energy storage and conversion. The widely used synthesis methods, such as traditional hydroThermal reaction and calcination, are bulk heating processes based on Thermal Radiation. Differing from traditional heating methods, non-Thermal Radiation heating technique is a local heating mode. In this regard, this review summarizes various non-Thermal Radiation heating methods for synthesis of nanomaterials, including microwave heating, induction heating, Joule heating, laser heating and electron beam heating. The advantages and disadvantages of these non-Thermal Radiation heating methods for the synthesis of nanomaterials are compared and discussed. Finally, the future development and challenges of non-Thermal Radiation heating method for potential synthesis of nanomaterials are discussed.