May 2022
Spotlight Summary by Johann Toudert
Infrared-blocking plasmonic meta-glass for energy-saving passive windows
To save energy in an increasingly warm world, building and vehicle windows must do more than let the sunlight in. They must selectively transmit or reflect it depending on wavelength across the solar spectrum. Expectedly, a window must transmit visible solar photons, to enable good indoor vision with a minimal use of artificial lighting. In contrast, infrared solar photons, which are not needed for vision but contribute to radiative indoor heating, must be reflected by the window to reduce the need for air conditioning in warm geographic areas.
In this paper, researchers from India theoretically propose a coating design that may endow glass windows with suitable spectral properties. It consists of an array of tungsten nanorings, which harnesses tailored plasmonic properties to transmit up to 60% of visible light and block up to 87% of near infrared light in the 750-1800 nm wavelength range. These properties overcome those of several previously reported coatings. Furthermore, the high melting point of tungsten is an asset for ensuring thermal stability. This work provides guidelines that experimentalists may like to follow to fabricate such coatings with high-throughput methods.
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In this paper, researchers from India theoretically propose a coating design that may endow glass windows with suitable spectral properties. It consists of an array of tungsten nanorings, which harnesses tailored plasmonic properties to transmit up to 60% of visible light and block up to 87% of near infrared light in the 750-1800 nm wavelength range. These properties overcome those of several previously reported coatings. Furthermore, the high melting point of tungsten is an asset for ensuring thermal stability. This work provides guidelines that experimentalists may like to follow to fabricate such coatings with high-throughput methods.
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Article Information
Infrared-blocking plasmonic meta-glass for energy-saving passive windows
Ashish Kumar Chowdhary, Tanmay Bhowmik, and Debabrata Sikdar
Opt. Lett. 47(9) 2242-2245 (2022) View: Abstract | HTML | PDF