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Non-iridescent transmissive structural color filter featuring highly efficient transmission and high excitation purity.

Shrestha VR, Lee SS, Kim ES, Choi DY - Sci Rep (2014)

Bottom Line: We report on a non-iridescent transmissive structural color filter, fabricated in a large area of 76.2 × 25.4 mm(2), taking advantage of a stack of three etalon resonators in dielectric films based on a high-index cavity in amorphous silicon.The proposed filter features a high transmission above 80%, a high excitation purity of 0.93 and non-iridescence over a range of 160°, exhibiting no significant change in the center wavelength, dominant wavelength and excitation purity, which implies no change in hue and saturation of the output color.The proposed structure may find its potential applications to large-scale display and imaging sensor systems.

View Article: PubMed Central - PubMed

Affiliation: Department of Electronic Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-Gu, Seoul 139-701, South Korea.

ABSTRACT
Nanostructure based color filtering has been considered an attractive replacement for current colorant pigmentation in the display technologies, in view of its increased efficiencies, ease of fabrication and eco-friendliness. For such structural filtering, iridescence relevant to its angular dependency, which poses a detrimental barrier to the practical development of high performance display and sensing devices, should be mitigated. We report on a non-iridescent transmissive structural color filter, fabricated in a large area of 76.2 × 25.4 mm(2), taking advantage of a stack of three etalon resonators in dielectric films based on a high-index cavity in amorphous silicon. The proposed filter features a high transmission above 80%, a high excitation purity of 0.93 and non-iridescence over a range of 160°, exhibiting no significant change in the center wavelength, dominant wavelength and excitation purity, which implies no change in hue and saturation of the output color. The proposed structure may find its potential applications to large-scale display and imaging sensor systems.

No MeSH data available.


Related in: MedlinePlus

Low Sensitivity to Input Polarization.Contour map of the measured transmission in terms of the wavelength and angle of incidence for (a) TE and (b) TM polarization. Contour map of the simulated transmission with regard to the wavelength and angle of incidence for (c) TE and (d) TM polarization. Peak transmission and relative wavelength shift (Δλo/λo) with the angle of incidence for (e) TE polarization and (f) TM polarization.
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f3: Low Sensitivity to Input Polarization.Contour map of the measured transmission in terms of the wavelength and angle of incidence for (a) TE and (b) TM polarization. Contour map of the simulated transmission with regard to the wavelength and angle of incidence for (c) TE and (d) TM polarization. Peak transmission and relative wavelength shift (Δλo/λo) with the angle of incidence for (e) TE polarization and (f) TM polarization.

Mentions: We aim to scrutinize the influence of polarization of light upon the performance of the device as a function of the angle of incidence θi. The measured contour maps for the transmission of the TE and TM polarizations for different wavelengths and angles are shown in Figure 3(a) and 3(b), respectively, while the maps for the simulations are given in Figure 3(c) and 3(d). For the angles ranging from 0° to 80°, the transfer characteristics revealed no distinct polarization sensitivity with respect to the center wavelength. Figure 3(e) and 3(f) present a plot of the variation of the peak transmission and relative wavelength shift (Δλo/λo) for the TE and TM polarizations, respectively. It is implied that for the case where θi = 0°, the center wavelength and peak transmission are identical for the two polarizations. The rate of decrease in peak transmission in terms of the increasing angle of incidence is severe for the TE polarization as a result of the Fresnel reflection at the air-SiO2 interface32.


Non-iridescent transmissive structural color filter featuring highly efficient transmission and high excitation purity.

Shrestha VR, Lee SS, Kim ES, Choi DY - Sci Rep (2014)

Low Sensitivity to Input Polarization.Contour map of the measured transmission in terms of the wavelength and angle of incidence for (a) TE and (b) TM polarization. Contour map of the simulated transmission with regard to the wavelength and angle of incidence for (c) TE and (d) TM polarization. Peak transmission and relative wavelength shift (Δλo/λo) with the angle of incidence for (e) TE polarization and (f) TM polarization.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4017218&req=5

f3: Low Sensitivity to Input Polarization.Contour map of the measured transmission in terms of the wavelength and angle of incidence for (a) TE and (b) TM polarization. Contour map of the simulated transmission with regard to the wavelength and angle of incidence for (c) TE and (d) TM polarization. Peak transmission and relative wavelength shift (Δλo/λo) with the angle of incidence for (e) TE polarization and (f) TM polarization.
Mentions: We aim to scrutinize the influence of polarization of light upon the performance of the device as a function of the angle of incidence θi. The measured contour maps for the transmission of the TE and TM polarizations for different wavelengths and angles are shown in Figure 3(a) and 3(b), respectively, while the maps for the simulations are given in Figure 3(c) and 3(d). For the angles ranging from 0° to 80°, the transfer characteristics revealed no distinct polarization sensitivity with respect to the center wavelength. Figure 3(e) and 3(f) present a plot of the variation of the peak transmission and relative wavelength shift (Δλo/λo) for the TE and TM polarizations, respectively. It is implied that for the case where θi = 0°, the center wavelength and peak transmission are identical for the two polarizations. The rate of decrease in peak transmission in terms of the increasing angle of incidence is severe for the TE polarization as a result of the Fresnel reflection at the air-SiO2 interface32.

Bottom Line: We report on a non-iridescent transmissive structural color filter, fabricated in a large area of 76.2 × 25.4 mm(2), taking advantage of a stack of three etalon resonators in dielectric films based on a high-index cavity in amorphous silicon.The proposed filter features a high transmission above 80%, a high excitation purity of 0.93 and non-iridescence over a range of 160°, exhibiting no significant change in the center wavelength, dominant wavelength and excitation purity, which implies no change in hue and saturation of the output color.The proposed structure may find its potential applications to large-scale display and imaging sensor systems.

View Article: PubMed Central - PubMed

Affiliation: Department of Electronic Engineering, Kwangwoon University, 20 Kwangwoon-ro, Nowon-Gu, Seoul 139-701, South Korea.

ABSTRACT
Nanostructure based color filtering has been considered an attractive replacement for current colorant pigmentation in the display technologies, in view of its increased efficiencies, ease of fabrication and eco-friendliness. For such structural filtering, iridescence relevant to its angular dependency, which poses a detrimental barrier to the practical development of high performance display and sensing devices, should be mitigated. We report on a non-iridescent transmissive structural color filter, fabricated in a large area of 76.2 × 25.4 mm(2), taking advantage of a stack of three etalon resonators in dielectric films based on a high-index cavity in amorphous silicon. The proposed filter features a high transmission above 80%, a high excitation purity of 0.93 and non-iridescence over a range of 160°, exhibiting no significant change in the center wavelength, dominant wavelength and excitation purity, which implies no change in hue and saturation of the output color. The proposed structure may find its potential applications to large-scale display and imaging sensor systems.

No MeSH data available.


Related in: MedlinePlus