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[International Journal] Poly-periodic hole arrays for angle-invariant plasmonic filters
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Yun Seon Do and Kyung Cheol Choi
Optics Letters, August , 2015
vol 40, no 16, pp 3873-3876
We suggest a plasmonic filter with novel hole arrays for an angle-invariant optical response. The suggested patterns consist of randomly distributed polycrystalline domains in which nano sized holes are arranged with the same period. While the microscopic area of periodicity determines the center wavelength and transmission intensity, the broken periodicity of each domain contributes to restrain the angle dependency. The results increase the possible use of nanohole-based filters in practical area.