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2016 ; 6
(ä): 28062
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Continuously Tunable, Polarization Controlled, Colour Palette Produced from
Nanoscale Plasmonic Pixels
#MMPMID27312072
Balaur E
; Sadatnajafi C
; Kou SS
; Lin J
; Abbey B
Sci Rep
2016[Jun]; 6
(ä): 28062
PMID27312072
show ga
Colour filters based on nano-apertures in thin metallic films have been widely
studied due to their extraordinary optical transmission and small size. These
properties make them prime candidates for use in high-resolution colour displays
and high accuracy bio-sensors. The inclusion of polarization sensitive plasmonic
features in such devices allow additional control over the electromagnetic field
distribution, critical for investigations of polarization induced phenomena. Here
we demonstrate that cross-shaped nano-apertures can be used for polarization
controlled color tuning in the visible range and apply fundamental theoretical
models to interpret key features of the transmitted spectrum. Full color
transmission was achieved by fine-tuning the periodicity of the apertures, whilst
keeping the geometry of individual apertures constant. We demonstrate this effect
for both transverse electric and magnetic fields. Furthermore we have been able
to demonstrate the same polarization sensitivity even for nano-size,
sub-wavelength sets of arrays, which is paramount for ultra-high resolution
compact colour displays.