Optical transitions and energy relaxation of hot carriers in Si nanocrystals

Dynamics of hot carriers confined in Si nanocrystals is studied theoretically using atomistic tight binding approach. Radiative, Auger-like and phonon-assisted processes are considered. The Auger-like energy exchange between electrons and holes is found to be the fastest process in the system. However the energy relaxation of hot electron-hole pair is governed by the single optical phonon emission. For a considerable number of states in small nanocrystals single-phonon processes are ruled out by energy conservation law.Comment: 3 pages, 4 figure

Generation of Photon-Plasmon Quantum States in Nonlinear Hyperbolic Metamaterials

We develop a general theoretical framework of integrated paired photon-plasmon generation through spontaneous wave mixing in nonlinear plasmonic and metamaterial nanostructures, rigorously accounting for material dispersion and losses in the quantum regime through the electromagnetic Green function. We identify photon-plasmon correlations in layered metal-dielectric structures with 70% internal heralding quantum efficiency and reveal a novel mechanism of broadband generation enhancement due to topological transition in hyperbolic metamaterials

Information Technology for Processing of Industrial BigData with Distributed Infrastructure on the Basis of Smart Agents and Parallel Algorithms

Volume 7 Issue 9 (September 201

Disorder-Robust Nonlinear Light Generation in Topological Nanostructures

We observe topologically nontrivial nonlinear edge states of light in zigzag arrays of silicon nanoparticles. We image the edge states via the third-harmonic generation and demonstrate their robustness against disorder and structural perturbationsWe acknowledge a support from the Air Force Office of Scientific Research (project FA2386-16-1-0002) and the Strategic Fund of the Australian National University