An optical coating like no otherFor more than a century, optical coatings have been used to better r

An optical coating like no otherFor more than a century, optical coatings have been used to better reflect certain wavelengths of light from lenses and other devices or, conversely, to better transmit certain wavelengths through them. For example, the coatings on tinted eyeglasses reflect, or “block out,” harmful blue light and ultraviolet rays.But until now, no optical coating had ever been developed that could simultaneously reflect and transmit the same wavelength, or color.In a paper in Nature Nanotechnology, researchers at the University of Rochester and Case Western Reserve University describe a new class of optical coatings, so-called Fano Resonance Optical Coatings (FROCs), that can be used on filters to reflect and transmit colors of remarkable purity.In addition, the coating can be made to fully reflect only a very narrow wavelength range.Read more. -- source link

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