2014
DOI: 10.1364/oe.22.003691
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Enhancement of color saturation and color gamut enabled by a dual-band color filter exhibiting an adjustable spectral response

Abstract: The enhancement of color saturation and color gamut has been demonstrated, by taking advantage of a dual-band color filter based on a subwavelength rectangular metal-dielectric resonant grating, which exhibits an adjustable spectral response with respect to its relative transmittances at the two bands of green and red, thereby producing any color in between green and red, through the adjustment of incoming light polarization. Also, the prominent features of the spectral response of the filter, namely the bandw… Show more

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Cited by 46 publications
(42 citation statements)
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“…In order to efficiently explore the dependency of the hue and saturation of the color output of the filter upon the angle of incidence θ i , as shown in Figure 2(a), the chromaticity coordinates corresponding to simulated and measured spectral responses were calculated and plotted in the standard CIE (International Commission on Illumination) 1931 chromaticity diagram27282930. The enlarged view of the diagram is also included in the figure.…”
Section: Resultsmentioning
confidence: 99%
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“…In order to efficiently explore the dependency of the hue and saturation of the color output of the filter upon the angle of incidence θ i , as shown in Figure 2(a), the chromaticity coordinates corresponding to simulated and measured spectral responses were calculated and plotted in the standard CIE (International Commission on Illumination) 1931 chromaticity diagram27282930. The enlarged view of the diagram is also included in the figure.…”
Section: Resultsmentioning
confidence: 99%
“…The dominant wavelength, which pertains to the point at which the extrapolated line joining the reference white point E (0.333, 0.333) and the chromaticity coordinates of the filter intersect the horseshoe-shaped curve, is identified first. The excitation purity is subsequently estimated as the ratio of the length of the line segment connecting the reference white point E and the chromaticity coordinates of the filter, to the length of the segment that connects the point E to the point associated with the dominant wavelength27282930. The chromaticity coordinates corresponding to the simulated and measured responses were apparently observed to suffer from no remarkable angular dependence.…”
Section: Resultsmentioning
confidence: 99%
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“…For such filters, a broad color-tuning characteristic is certainly desirable for their applications in three-dimensional projection display systems, ultra-fast displays, security tags, polarization detectors, and active color pixels567. Devices that rely on the guided-mode resonance (GMR) effect are especially attractive for their simple design and fabrication, proper bandwidth, sound color purity, compact size, and flexible transfer characteristics78910; however, they are mostly limited to a static case wherein the emergence of a predetermined single color is facilitated.…”
mentioning
confidence: 99%
“…For such filters, a broad color-tuning characteristic is certainly desirable for their applications in three-dimensional projection display systems, ultra-fast displays, security tags, polarization detectors, and active color pixels567. Devices that rely on the guided-mode resonance (GMR) effect are especially attractive for their simple design and fabrication, proper bandwidth, sound color purity, compact size, and flexible transfer characteristics78910; however, they are mostly limited to a static case wherein the emergence of a predetermined single color is facilitated. In an attempt to obtain adaptively controlled spectral characteristics, various schemes that tapped into the adjustment of the angle of incidence or the grating period, the thermo-/electro-optic effect, and the mechanical control of the device position were previously attempted910111213; however, a high drive voltage was required in all cases, and moreover, the devices needed to be accurately aligned, thereby limiting their tuning range.…”
mentioning
confidence: 99%