Comment on “Brighter Light Sources from Black Metal: Significant Increase in Emission Efficiency of Incandescent Light Sources”

A Comment on the Letter by A. Y. Vorobyev, V. S. Makin, and Chunlei Guo, Phys. Rev. Lett. 102, 234301 (2009). The authors of the Letter offer a Reply.

Figure 1

Relative emissivity, $\epsilon (\lambda )/\epsilon (800\mathrm{nm})$ of polished tungsten compared to that of NC-LIPPS and black tungsten based on the absorptance calculated from the digitized reflectance data in Figure 3 of Ref. 1.