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- W2036995804 abstract "The deposition of hydrogen-opaque metallic wires on GaAsN and subsequent hydrogen irradiation allows creating planar regions, where the properties of GaAsN are alternated with those of GaAs (i.e., hydrogenated GaAsN) in a fully controllable manner. We present here a breakthrough of this approach showing the possibility to fabricate a new class of semiconductor nanostructures. Firstly, we report on a detailed study of H kinetics in GaAsN. By combining secondary ions mass spectrometry (SIMS) measurements with a model developed for hydrogen diffusion in a crystal with high trap density (namely, N atoms), we demonstrate that a tight spatial control of H–N interaction in dilute nitrides is feasible. Then, we present the first nanostructures fabricated with the masked-hydrogenation procedure. Specifically, we study the properties of H-structured GaAsN/GaAs wires having different width. In the case of the narrowest metallic wires (w = 80 nm), photoluminescence (PL) shows a blueshift of the ground state energy and a 50-fold increase in the PL efficiency. Moreover, time-resolved micro-PL displays a marked slow-down of the carrier recombination dynamics in the single structure. This indicates the occurrence of carrier quantum confinement that leads to a reduced density of states of the system, which changes its dimensionality from 3D to 2D." @default.
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- W2036995804 date "2011-04-05" @default.
- W2036995804 modified "2023-09-27" @default.
- W2036995804 title "Hydrogen-mediated nanostructuring of dilute nitride semiconductors" @default.
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- W2036995804 doi "https://doi.org/10.1002/pssb.201000797" @default.
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