A widely tunable refractive index in a nanolayered photonic material

Abstract

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Mechanical Behavior of Multilayered Nanoscale Metal‐Ceramic Composites

“…[1±3] Single metallic films [4±11] and multilayered metal films, [10,12,13] metal-ceramic layered composites, [14±25] ceramic-ceramic layered composites [26,27] and polymer nanolayered composites [28,29] have been investigated. Improved hardness, wear resistance, toughness, and/or oxidation resistance may be achieved through careful selection and optimization of layered materials at the nanoscale.…”

Improved Properties of Optical Surfaces by Following the Example of the “Moth Eye”

“…Disturbing light reflection from computer monitors, television screens and LCD displays are further examples from daily experience. Antireflection coatings are most frequently single or multilayer interference structures with alternating high and low refractive indices (Walheim et al 1999) (Sandrock et al 2004) (Xi et al 2007). Reflection is reduced for normal incidence due to destructive interference of reflected light from the layer-substrate and the air-layer interface.…”

Measuring Stability and Security in Iraq

“…Caseri showed that particle size should be reduced to below ~50 nm in a nanocomposite in order maintain transparency with relaxed restrictions on refractive index matching (7). In this size regime, with characteristics lengths much smaller than the incident wavelengths, light passing through the interphase will be less susceptible to scattering, and the region will behave as an optically homogeneous material with a refractive index (n i ) that is essentially the volumeaveraged refractive index of its constituents (8). Therefore, if the nanocomposite interphase is composed of the same glass and polymer as the conventional composite with refractive indices n g and n p , respectively, then…”