High Efficiency Colored Radiative Cooling Surfaces Through Narrowband Beam Deflection

This technology introduces a novel method for creating colored surfaces that preserve high radiative cooling efficiency. Traditional colored surfaces tend to absorb specific wavelengths of light, which increases surface temperatures and diminishes cooling capabilities. In contrast, this invention employs advanced metasurface-based beam deflectors to produce coloration through light scattering, rather than absorption. This approach enables these surfaces to deflect unwanted wavelengths while maintaining efficient cooling properties, making them ideal for applications requiring thermal management in combination with aesthetic customization.

Background: 
The key challenge addressed by this invention is the inefficiency of conventional colored surfaces in cooling applications. Typically, such surfaces absorb light to achieve coloration, which results in increased heat accumulation and poor cooling performance. Current solutions struggle to balance aesthetic requirements with thermal management, especially in outdoor or heat-sensitive environments. The technology overcomes this by leveraging metasurface-based beam deflection or scattering, offering an efficient cooling solution without compromising color quality. Unlike traditional methods, this innovation avoids unnecessary absorption of light and instead reflects specific wavelengths for enhanced thermal regulation.

Applications: 

• Building materials (heat reflective, colored exterior coatings)
• Heat exchangers for industrial cooling systems
• Solar panels with integrated color customization
• Outdoor furniture, roofing, or automotive surfaces

Advantages: 

• Efficient cooling while maintaining aesthetic color options
• Reduced surface heat build-up
• Visually and functionally customizable
• Versatile