Researchers have realized one of the long-standing theoretical predictions in nonlinear optical metamaterials: creation of a nonlinear material that has opposite refractive indices at the fundamental and harmonic frequencies of light.
Earth’s air pollution and climate change issues are linked to combustion and its detrimental byproducts: greenhouse gases such as carbon dioxide (CO2) and gases that pollute the atmosphere such as nitrogen oxides.
In work sponsored by the Air Force Research Laboratory, Georgia Tech Research Institute (GTRI) researchers have developed a computer-based simulation technique that permits the characterization of complex natural and engineered materials.
Georgia Tech researchers have developed a new type of foam — called capillary foam. The research shows for the first time that the combined presence of particles and a small amount of oil in water-based foams can lead to exceptional foam stability.