High-transmission polarization-dependent active plasmonic color filters

Pillared cobalt metal–organic frameworks act as chromatic polarizers

“…24 MOFs may therefore be an attractive alternative to the complex nanopatterning processes currently needed for plasmonic polarizers. 20 The results presented here would be the first example of dichromatic dichroism being an intrinsic material property. We propose that this strategy can be used to produce versatile dichroic materials active in other ranges of the electromagnetic spectrum, provided that the linker (or linkers), the inorganic building units, and therefore the topology, are selected accordingly.…”

“…So far, most materials that show intrinsic dichroism are monochromatic, that is, an increase or decrease of the intensity of a single absorption mode simply results in the apparent change of the color's saturation. In contrast, photonic metamaterials, whose properties follow from their nanostructured features, 20 are capable of showing a dichromatic linear dichroism, where changing the polarization of incident light the material leads to two distinct material colors. [21][22][23][24] This is a key advantage towards their application in polarimetry spectroscopy, security tags, and hyperspectral imaging, among others.…”

“…[21][22][23][24] This is a key advantage towards their application in polarimetry spectroscopy, security tags, and hyperspectral imaging, among others. 20,22,24 Interestingly, with regard to dichroic molecular crystals, the reticular chemistry concept behind metal-organic frameworks (MOFs) may offer a further degree of control over the orientation of molecules while simultaneously facilitating the use of well-known coordination complexes as chromophores. MOFs are based on highly directional coordination bonding, and thorough research in the past two decades has provided an immense library of node and linker geometries which can be rationally selected to achieve desired properties.…”

The application of Ca5B2SiO10:Eu3+ and YAl3B4O12:Ce3+,Mn2+ in dual-layer remote phosphor to enhance lumen output and color quality of WLEDs

“…Moreover, they can reduce the light loss inside LED which occurs due to the internal reflection [17]. Besides, as mentioned in another study, high angular correlated color temperature uniformity and better color stability can be achieved with a patterned remote phosphor configuration having a clear zone in the perimeter area that is not coated by phosphor on the surrounding surface [18]. Additionally, in a far field pattern, the patterned sapphire substrate used in the remote phosphor structure can bring much higher correlated color temperature homogeneity than in a conventional pattern [19]- [22].…”

Investigation on the application of ZnO nanostructures to improve the optical performance of white light-emitting diodes

“…These days, the scattering effects of ZnO nanostructures have been recognized, and this material is also beneficial to WLED production as it is a low-price material, and easy to control their morphologies and synthesize [21][22][23][24]. Moreover, it is possible to get many structures of ZnO by modification and control of the reaction conditions, for instances, time, temperature, and precursor concentration.…”