Photoreflectance and Reflectance investigation of deuterium-irradiated GaAsN

Geddo, Mario; Ciabattoni, Tiziana; Guizzetti, Giorgio; Galli, Matteo; Patrini, Maddalena; Polimeni, A.; Trotta, R.; Capizzi, M.; Bais, G.; Piccin, M.; Rubini, S.; Martelli, F.; Franciosi, A.

doi:10.1063/1.2709629

The effect of deuterium irradiation on the optical and strain properties of GaAsN/GaAs heterostructures was investigated by photoreflectance and reflectance techniques. The strain occurring in as-grown and deuterated GaAsN layers is monitored and measured by means of photoreflectance spectroscopy, highlighting the strain inversion after irradiation. By combining static and modulated reflectance results, evidence is given that the deuterium-induced recovery of the GaAs band gap as well as the strain inversion in GaAsN layers are accompanied by a 0.4%– 0.8% reduction of the refractive index in the 1.31 and 1.55 m spectral windows of interest for fiber optic communications.

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Titolo:	Photoreflectance and Reflectance investigation of deuterium-irradiated GaAsN
Autori:	GEDDO, MARIO CIABATTONI, TIZIANA GUIZZETTI, GIORGIO GALLI, MATTEO PATRINI, MADDALENA A. Polimeni R. Trotta M. Capizzi G. Bais M. Piccin S. Rubini F. Martelli A. Franciosi mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2007
Rivista:	APPLIED PHYSICS LETTERS
Abstract:	The effect of deuterium irradiation on the optical and strain properties of GaAsN/GaAs heterostructures was investigated by photoreflectance and reflectance techniques. The strain occurring in as-grown and deuterated GaAsN layers is monitored and measured by means of photoreflectance spectroscopy, highlighting the strain inversion after irradiation. By combining static and modulated reflectance results, evidence is given that the deuterium-induced recovery of the GaAs band gap as well as the strain inversion in GaAsN layers are accompanied by a 0.4%– 0.8% reduction of the refractive index in the 1.31 and 1.55 m spectral windows of interest for fiber optic communications.
Handle:	http://hdl.handle.net/11571/32489
Appare nelle tipologie:	1.1 Articolo in rivista

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