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20 papers · 1 filter
Tuning of polarisation sensitivity in closely-stacked trilayer InAs/GaAs quantum dots induced by overgrowth dynamics
Vittorianna Tasco, Muhammad Usman, Milena De Giorgi +1
Tailoring electronic and optical properties of self-assembled InAs quantum dots (QDs) is a critical limit for the design of several QD-based optoelectronic devices operating in the…
Photoelectron emission from plasmonic nanoparticles: Comparison between surface and volume photoelectric effects
Alexander V. Uskov, Igor E. Protsenko, Renat Sh. Ikhsanov +5
We study emission of photoelectrons from plasmonic nanoparticles into surrounding matrix. We consider two mechanisms of the photoelectric effect from nanoparticles - surface and vo…
Polarization dependent, surface plasmon induced photoconductance in gold nanorod arrays
S. Diefenbach, N. Erhard, J. Schopka +4
We report on the photoconductance in two-dimensional arrays of gold nanorods which is strongly enhanced at the frequency of the longitudinal surface plasmon of the nanorods. The ar…
First-principles molecular dynamics simulations of proton diffusion in cubic BaZrO3 perovskite under strain conditions
Marco Fronzi, Yoshitaka Tateyama, Nicola Marzari +1
First-principles molecular dynamics simulations have been employed to analyze the proton diffusion in cubic BaZrO3 perovskite at 1300K, and a non-linear effect of an applied isomet…
Derivation of 12- and 14-band Hamiltonians for dilute bismide and bismide-nitride semiconductors
Christopher A. Broderick, Muhammad Usman, Eoin P. O'Reilly
Using an tight-binding model we demonstrate how the observed strong bowing of the band gap and spin-orbit-splitting with increasing Bi composition in the dilute bismi…
Composition dependent band gap and band edge bowing in AlInN: A combined theoretical and experimental study
S. Schulz, M. A. Caro, L. -T. Tan +3
A combined experimental and theoretical study is presented of the band gap of AlInN, confirming the breakdown of the virtual crystal approximation (VCA) for the conduction and vale…