Figure 6.

Emissivity spectra for 2D periodic arrays of cylindrical holes in single crystal tungsten at various angles (a = 800 nm, r = 380 nm, and d = 3.04 μm. Notice that the average emissivity gradually decreases with increasing angle away from normal incidence.

Bermel et al. Nanoscale Research Letters 2011 6:549   doi:10.1186/1556-276X-6-549
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