RT Journal Article
T1 GeO_2 Nanowires Doped with Optically Active Ions
A1 Hidalgo Alcalde, Pedro
A1 Liberti, Emanuela
A1 Rodriguez lazcano, Yamilet
A1 Méndez Martín, Bianchi
A1 Piqueras de Noriega, Javier
AB GeO_2 nanowires doped with Eu, Er, or Mn, as well as codoped with each of these ions and Sri, have been grown by a catalyst-free vapor-solid process. The incorporation of Sri has been found, in all cases, to favor the formation of straight wires, which make them more appropriate for waveguiding purposes. Cathodoluminescence (CL.) in the scanning electron microscope (SEM) has been used to investigate the complex light emission from the nanowires. Rare earth ion emission lines and defect related bands have been observed in Eu- and Er-doped nanowires. Optical coupling and waveguiding behavior of Er-doped GeO_2 nanowires have been demonstrated for green laser light and for Er excited luminescence in the wires. In Mn-doped GeO_2 nanowires a band centered at 1.75 eV had been detected. X-ray photoemission measurements show the presence of GeO oxide in the surface of the GeO_2 wires, which influences their native defect structure.
PB Amer Chemical Soc
SN 1932-7447
YR 2009
FD 2009-10-01
LK https://hdl.handle.net/20.500.14352/44091
UL https://hdl.handle.net/20.500.14352/44091
LA eng
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NO © 2009 American Chemical Society.This work has been supported by MEC (Project MAT 2006-01259). The authors are grateful to Dr. Luca Gregoratti at the Sincrotron Trieste for useful advises on XPS measurements.
NO MEC
DS Docta Complutense
RD 29 abr 2024