High-efficiency <i>in situ</i> amplitude and phase control of infrared light using topological polaritons

Luo, Guoyu; Lv, Xinyu; Kong, Weijie; Wang, Changtao; Pu, Mingbo; Wang, Yanqin; Ma, Xiaoliang; Li, Zhiqiang; Luo, Xiangang

doi:10.1039/d3nr01497e

Cited by 1 publication

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“…To enable efficient cooling under direct sunlight, the structure must satisfy two key conditions: high reflectivity in sunlight wavelengths ranging from 0.3 to 2.5 μm and high thermal emission within the transparent window of the atmosphere between 8 and 13 μm. , Conversely, for effective heating, the structure should exhibit a high absorption in the solar spectrum and low thermal emission within the transparent window of the atmosphere. In this section, methods for designing nanostructures based on Fabry–Perot cavities for thermal management are described in detail.…”

Section: Theory and Methodsmentioning

confidence: 99%

Symmetric and Asymmetric Fabry–Pérot Cavity Design for a Dual-Mode Thermal Management Photonic Film with High-Purity Color

Nan,

Guo,

Yang

et al. 2024

Ind. Eng. Chem. Res.

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Radiative thermal management (RTM) is a sustainable and environmentally friendly strategy because it needs no external energy input and can reduce greenhouse gas emissions and thus recently has gained significant attention. However, the material color in existing radiative cooling/heating applications is traditionally white/black in order to maximize cooling/heating performance, which limits their practical application range. Herein, we propose a symmetric and asymmetric Fabry–Pérot cavity structure to fabricate a polymer-based photonic dual-mode thermal management film with a high-purity structural color display. The film can be adjusted as needed to produce a colored appearance with different hues while simultaneously maintaining sufficient radiative cooling power. The cooling side of the color dual-mode photon film exhibits high solar reflectivity (92.1%) and infrared emissivity (96.0%). Therefore, the maximum radiative cooling effect in the daytime subenvironment reaches 5.8 °C, and the maximum theoretical cooling power is high up to 62.6 W/m2. Meanwhile, the heating side of the dual-mode film features a very low infrared emissivity (8.2%) and a high solar absorption rate (61.5%), and its radiative heating capacity reaches 61.1 °C. Compared with traditional coatings, the colored dual-mode film can save up to 10.3% of annual energy in the northern and southern temperate zones. The color dual-mode photon film can easily switch between cooling and heating modes by flipping to adapt to dynamic cooling and heating scenarios, which is of great significance for alleviating the greenhouse effect and promoting sustainable development.

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Section: Theory and Methodsmentioning

confidence: 99%

Symmetric and Asymmetric Fabry–Pérot Cavity Design for a Dual-Mode Thermal Management Photonic Film with High-Purity Color

Nan,

Guo,

Yang

et al. 2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

High-efficiency in situ amplitude and phase control of infrared light using topological polaritons

Abstract: Polaritons - material excitations coupled with light - are thought to hold the potential for the extreme control of light down to the atomic length-scale because of their high field...

Cited by 1 publication

References 45 publications

Symmetric and Asymmetric Fabry–Pérot Cavity Design for a Dual-Mode Thermal Management Photonic Film with High-Purity Color

Symmetric and Asymmetric Fabry–Pérot Cavity Design for a Dual-Mode Thermal Management Photonic Film with High-Purity Color

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