This open access book aiming at the current problems such as a single thermal radiation modulation mode, this book proposes an active modulation method of thermal radiation characteristics based on temperature-voltage coupling, which reveals the potential physical mechanism through the electric field distribution at different wavelengths and the power dissipation density distribution, and considers the effects of incident angle, polarization angle, and geometrical parameters on the spectral radiation characteristics. The spectral radiation modulation of one-dimensional periodic micro-nano-structures is investigated, and a theoretical model of smooth-type periodic structures is established to analyze the influence of the rotation angle of the crystal axis on the spectral radiation characteristics. With the help of equivalent medium theory, the two-dimensional periodic micro-nano-structures are equivalent to a gradient refractive index medium along the z-axis direction, and their broadband absorption properties are explained with the refractive index matching theory. On this basis, the spontaneous radiation modulation of a single-layer flat plate structure is investigated by taking the biaxial hyperbolic material α-phase molybdenum trioxide (α-MoO3) as an example, and the relationship between the Purcell factor and the rotation angle of the crystal axis of α-MoO3 when the crystal axis is rotated in different planes is discussed respectively. The modulation phenomenon is interpreted by the distribution of the reflection coefficients in the space of dimensionless wavevectors. The effect of lossy/lossless substrate on near-field radiative heat transfer between α-MoO3 films is investigated, and the near-field radiative heat transfer is discussed when the near-field radiative heat transfer is along different crystallographic axes directions, respectively, and the effects of thickness and the permittivity of the substrate on the near-field radiative heat transfer of the α-MoO3 films are revealed. To address the demand for efficient solar thermal conversion in solar energy applications, research on solar absorbers and nanofluids based on micro- and nanostructured materials has been carried out. The superposition Fabry-Perot resonance theory is applied to the field of solar thermal harvesting, and a design method of solar absorber with multilayer membrane structure is proposed, which reveals the potential mechanism of high absorption performance in different bands and analyzes the influence of the number of cells on the spectral absorption performance. The photothermal conversion properties of solid/hollow nanopillar structures based on four equipartitioned excitation materials are investigated and compared, and the effect of hollow structures on the equipartitioned resonance of localized/propagating surfaces in the nanopillar structures is revealed by investigating the optical properties and resonance modes of solid/hollow nanopillar structures of different materials.

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Haotuo Liu is Associate Professor and Master's Supervisor at Harbin University of Science and Technology. He earned his Ph.D. from the Institute of Aerospace Thermophysics at Harbin Institute of Technology, where his doctoral dissertation received honors as an HIT Outstanding Doctoral Dissertation and a New Era Longjiang Outstanding Doctoral Dissertation. Currently leading four research projects including the NSFC Young Science Fund and China Postdoctoral Science Foundation, he also contributes to key initiatives such as the NSFC Joint Fund Key Project and Heilongjiang Outstanding Youth Fund. With over 70 SCI publications in journals including Fundamental Research, ACS Photonics, and Renewable Energy, he has authored an English chapter for Elsevier's Solid State Physics series and serves on the Youth Editorial Board of Advanced Manufacturing and other international journals. Xiaohu Wu is a Researcher at the Shandong Institute of Advanced Technology. He has been awarded the China Youth May Fourth Medal, the Shandong Provincial Excellent Youth Fund, and the Taishan Scholar Young Expert Program of Shandong Province. He received his Ph.D. from Peking University in 2019, during which he was jointly trained at the Georgia Institute of Technology. His research focuses on radiative heat transfer, solar thermal energy utilization, and micro-nano photonics. He has published over 100 SCI-indexed papers as first or corresponding author in journals such as Optica, Renewable Energy, and ACS Photonics. His doctoral dissertation was honored as an Outstanding Doctoral Dissertation of Peking University and was subsequently published in English by Springer. His work on non-reciprocal thermal radiation earned him the Hartnett-Irvine Award from the International Centre for Heat and Mass Transfer, while his research on hyperbolic materials was selected for the "Optics in 2020" list (Top 30 global advances in optics). Caixu Yue is a Professor and Doctoral Supervisor at Harbin University of Science and Technology, and has been awarded Young Yangtze River Scholar. He currently serves as the Dean of the School of Mechanical and Power Engineering, Deputy Head of the Key Laboratory of Advanced Manufacturing and Intelligent Technology (Ministry of Education), and Deputy Head of the National-Local Joint Engineering Laboratory for High-Efficiency Cutting & Tools. His long-standing research focuses on intelligent manufacturing, modeling of cutting processes, and complex cutting tool design. He has led over 10 significant national and provincial/ministerial-level projects, including the National Key R&D Program of China and grants from the National Natural Science Foundation of China. Professor Yue has published 195 papers (including 3 ESI Highly Cited Papers), authored 5 monographs, secured 17 invention patents and 4 software copyrights, and contributed to formulating 1 national standard. His notable recognitions include the Second Prize of Heilongjiang Provincial Science and Technology Progress Award (as the first-ranked contributor), the First Prize of China Machinery Industry Technology Invention Award (second-ranked contributor), and the Second Prize of China Machinery Industry Science and Technology Progress Award (second-ranked contributor).

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Micro/Nano Structure Thermal Radiation Modulation

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