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31 August 2015 Wideband and wide angle thermal emitters for use as lightbulb filaments
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Abstract
We present optimized aperiodic structures for use as broadband, broad-angle thermal emitters which are capable of drastically increasing the efficiency of tungsten lightbulbs. These aperiodic multilayer structures designed with alternating layers of tungsten and air or tungsten and silicon carbide on top of a tungsten substrate exhibit broadband emittance peaked around the center of the visible wavelength range. We investigate the properties of these structures for use as lightbulb filaments, and compare their performance with conventional lightbulbs. We find that these structures greatly enhance the emittance over the visible wavelength range, while also increasing the overall efficiency of the bulb.
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Christopher H. Granier, Simón G. Lorenzo, Jonathan P. Dowling, and Georgios Veronis "Wideband and wide angle thermal emitters for use as lightbulb filaments", Proc. SPIE 9546, Active Photonic Materials VII, 954603 (31 August 2015); https://doi.org/10.1117/12.2190240
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