Negative refraction in hyperbolic hetero-bicrystals
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DOI: 10.1126/science.adf1065
Abstract: We visualized negative refraction of phonon polaritons, which occurs at the interface between two natural crystals. The polaritons—hybrids of infrared photons and lattice vibrations—form collimated rays that display negative refraction when passing through a planar… read more here.
Keywords: interface two; refraction mid; refraction; polaritons occurs ... See more keywords
Gate-tunable negative refraction of mid-infrared polaritons
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DOI: 10.1126/science.adf1251
Abstract: Negative refraction provides a platform to manipulate mid-infrared and terahertz radiation for molecular sensing and thermal emission applications. However, its implementation based on metamaterials and plasmonic media presents challenges with optical losses, limited spatial confinement,… read more here.
Keywords: mid infrared; refraction mid; refraction; negative refraction ... See more keywords