Journal article

Plasmonic Colour Filters Based on Coaxial Holes in Aluminium

Ranjith Rajasekharan Unnithan, Miao Sun, Xin He, Eugeniu Balaur, Alexander Minovich, Dragomir N Neshev, Efstratios Skafidas, Ann Roberts

MATERIALS | MDPI | Published : 2017


Aluminum is an alternative plasmonic material in the visible regions of the spectrum due to its attractive properties such as low cost, high natural abundance, ease of processing, and complementary metal-oxide-semiconductor (CMOS) and liquid crystal display (LCD) compatibility. Here, we present plasmonic colour filters based on coaxial holes in aluminium that operate in the visible range. Using both computational and experimental methods, fine-tuning of resonance peaks through precise geometric control of the coaxial holes is demonstrated. These results will lay the basis for the development of filters in high-resolution liquid crystal displays, RGB-spatial light modulators, liquid crystal o..

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