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Simulated normal emittance spectra for flat tungsten and three 2D tungsten PhC geometries (using tungsten optical properties from Ref. 12), where incident field is polarized in the direction. 2D tungsten PhCs have following parameters: 2D W PhC I: , , , 2D W PhC II: , , , 2D W PhC III: , , . The inset shows one period of the simulated structure where is the radius of the holes, is the hole depth and is the period of the PhC.
SEM images of two fabricated 2D single crystal tungsten PhC samples with following parameters: (a) 2D W PhC I: , , and (b) 2D W PhC III: , , .
Flowchart of the 2D W PhC microfabrication process.
Measured and simulated normal emittance for flat tungsten and three 2D W PhC.
Estimated and simulated cutoff frequencies for three different 2D W PhC geometries.
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