Observatorio de I+D+i UPM

Memorias de investigación
Research Publications in journals:
High optical sensitivity to ambient conditions of uncapped InGaAs surface quantum dots
Year:2012
Research Areas
  • Physics chemical and mathematical,
  • Phisics,
  • Physics - Structure of materials,
  • Description
Information
Abstract
The influence of the environment on the optical properties of self-assembled In0.5Ga0.5As surface quantum dots is studied as a function of different ambient conditions for sensing applications. Their room temperature photoluminescence (PL) quenches under vacuum and decreases strongly under dry O2 or N2 environments. Nevertheless, they have a strong signal at 1.55 lm in air or in a wet atmosphere. The presence of water molecules in the environment improves the PL intensity likely due to its polar character and therefore its easier adsorption by the surface dangling bonds, leading to a suppression of the non-radiative recombination centers.
International
Si
JCR
Si
Title
Applied Physics Letters
ISBN
0003-6951
Impact factor JCR
0
Impact info
Volume
Journal number
From page
131601-1
To page
131601-3
Month
SIN MES
Ranking
Participants
  • Autor: M.Jose Milla Rodrigo (UPM)
Research Group, Departaments and Institutes related
  • Creador: Departamento: Ingeniería Electrónica
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)