INVESTIGADORES
MARTINEZ Oscar Eduardo
artículos
Título:
PICOSECOND ABSORPTION DYNAMICS OF PHOTOEXCITED INGAP EPITAXIAL-FILMS
Autor/es:
THIAGARAJAN, P; SCHMERGE, JF; C.S. MENONI; M.C. MARCONI; O.E. MARTÍNEZ; J.J. ROCCA; HAFICH, MJ
Revista:
APPLIED PHYSICS LETTERS
Editorial:
AMER INST PHYSICS
Referencias:
Lugar: American Institute of Physics; Año: 1991 vol. 59 p. 90 - 92
ISSN:
0003-6951
Resumen:
The absorption recovery of a photoexcited InGaP epitaxial film 0.4-mu-m thick was investigated using the pump-probe laser technique and found to have a time constant of 55 ps at room temperature. Measurements done in the temperature range of 300-50 K show the decay of the photoexcited carrier distribution to be dominated by ambipolar diffusion and surface recombination. The measured absorption recovery time constant corresponds to an ambipolar diffusion coefficient D > 2.8 cm2/s and a surface recombination velocity of S > 4 X 10(5) cm/s at room temperature.
