We present the results of rigorous three-dimensional, finite-difference, time-domain calculations of near- and far-field properties of pairs of Au bipyramidal nanoparticles in three different ...

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School of Physics and Electronic Engineering & Institute of Laser Spectroscopy, State Key Laboratory of Quantum Optics and Quantum Optics Devices, Shanxi University, Taiyuan 030006, P. R. China ...

Corundum crystals are pink, purple to red, and blue; colorless sapphire coexists with ruby, as well as gray to brown and bipyramidal sapphire and trapiche ruby. Gem corundum is associated with spinel ...