Incandescent Light Bulbs Based on a Refractory Metasurface

Incandescent Light Bulbs Based on a Refractory Metasurface

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A thermal radiation light source, such as an incandescent light bulb, is considered a legacy light source with low luminous efficacy.However, it is an ideal energy source converting light with high efficiency from electric power to radiative power.In this work, we evaluate a thermal radiation light source and propose a new type of filament Vacuum Dust Bags using a refractory metasurface to fabricate an efficient light bulb.

We demonstrate visible-light spectral control using a refractory metasurface made of tantalum with an optical microcavity inserted into an incandescent light bulb.We use a nanoimprint method to fabricate the filament that is suitable for mass production.A 1.

8 times enhancement of thermal radiation intensity is observed from the microcavity filament compared to the flat filament.Then, we demonstrate the thermal radiation control of the metasurface using a refractory plasmonic cavity made of hafnium nitride.A single narrow resonant peak is observed at the designed wavelength as well as the suppression of thermal radiation in Cleaning wide mid-IR range under the condition of constant surface temperature.