Photonics, Volume 6, Issue 4 (December 2019) – 28 articles
Cover Story (view full-size image): The prototype of an incandescent light bulb with a refractory metasurface filament is demonstrated using the nanoimprint method. An array of microcavity is fabricated on a tantalum (Ta) substrate and implemented into the bulb. It enhances incandescence around the resonant wavelength of the cavity in thermal radiation. In addition, a refractory plasmonic metasurface composed of hafnium nitride (HfN) meta-atoms emits narrow-band thermal radiation at a wavelength of 4.1 micrometers and suppresses longer wavelength emission to the peak. It is predicted to enhance power efficiency by four times compared to a bare surface in theory. The implementation of refractory plasmonic metasurface so-called “metafilament” into a light bulb paves the way for the realization of a full-spectral eco-lamp in future.View this paper.
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