Artículo
Investigation of proton damage in III-V semiconductors by optical spectroscopy
Yaccuzzi, Exequiel Eliseo
; Sevak Khachadorian; Suarez, Sergio Gabriel
; Reinoso, Maria Elba
; Goñi, A. R.; Strittmatter, A.; Hoffmann, A.; Giudici, Paula
Fecha de publicación:
05/2016
Editorial:
American Institute of Physics
Revista:
Journal of Applied Physics
ISSN:
0021-8979
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We studied the damage produced by 2 MeV proton radiation on epitaxially grown InGaP/GaAs structure by means of spatially resolved Raman and photoluminescence (PL) spectroscopy. The irradiation was performed parallel to the sample surface in order to determine the proton penetration range in both compounds. An increase in the intensity of longitudinal optical phonons and a decrease in the luminescence were observed. We associate these changes with the creation of defects in the damaged region, also responsible for the observed change of the carrier concentration in the GaAs layer, determined by the shift of the phonon-plasmon coupled mode frequency. From the spatially resolved profile of the PL and phonon intensities, we obtained the proton range in both materials and we compared them with stopping and range of ions in matter simulations. The comparison between the experimentally obtained proton range and simulations shows a very good agreement for GaAs but a discrepancy of 20% for InGaP. This discrepancy can be explained in terms of limitations of the model to simulate the electronic orbitals and bonding structure of the simulated compound. In order to overcome this limitation, we propose an increase in 40% in the electronic stopping power for InGaP.
Palabras clave:
RADIACION
,
PROTONES
,
RAMAN
,
FOTOLUMINISCENCIA
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Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Yaccuzzi, Exequiel Eliseo; Sevak Khachadorian; Suarez, Sergio Gabriel; Reinoso, Maria Elba; Goñi, A. R.; et al.; Investigation of proton damage in III-V semiconductors by optical spectroscopy; American Institute of Physics; Journal of Applied Physics; 119; 23; 5-2016; 1-6
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