Science Daily July 5, 2018 Researchers in Canada have genetically engineered E. coli to produce large amounts of lycopene that is particularly effective at harvesting light for conversion to energy. The pigment‐producing cells are coated with TiO2 nanoparticles and the mixture is applied to a glass surface. With the coated glass acting as an anode at one end of their cell, they generated a current density of 0.686 milliamps per square centimetre — an improvement on the 0.362 achieved by others in the field. According to the researchers the hybrid materials can be manufactured economically and sustainably. With sufficient optimization, […]
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Spectral cloaking could make objects invisible under realistic conditions
Phys.org June 28, 2018 Most current cloaking devices can fully conceal the object of interest only when the object is illuminated with just one color of light. Researchers in Canada propose a new conceptual approach enabling the realization of full-field broadband invisibility. This involves a customized and reversible redistribution of the illumination frequency content, allowing the wave to propagate through the object of interest while preventing any interaction between the wave and the object. They demonstrated the concealment of a broadband optical filter from detection with a phase-coherent light pulse of 500 GHz bandwidth, showing full restoration of the complex […]