Physics
Scientific paper
Sep 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002spie.4919...75z&link_type=abstract
Advanced Materials and Devices for Sensing and Imaging. Edited by Yao, Jianquan; Ishii, Yukihiro. Proceedings of the SPIE, Volu
Physics
Scientific paper
N-type strained GaInAsP/InP multiple quantum well (MQW) structures have been grown successfully using all solid source molecular beam epitaxy (MBE) and the effects of doping density in the wells on the quality of the MQW structures have been investigated. In the high-resolution x-ray diffraction curves, well-defined sharp satellite peaks up to the 15th order can be observed, indicating a very high crystalline quality of the MQW structures. With increase of Si-doping concentration in the wells, the lattice mismatch increases. The FWHM of the zero-order peak also increases and fits a Logistic function well with the doping density. The period of the MQW structures is found to decrease and the intensity of the first-order satellite peak to decays exponentially. All the observations can be explained by the changes in lattice constant, interface defects, dopant diffusion and possibly growth rate, caused by high doping in the wells of the MQW structures.
Fan Weijun
Kam Chan Hin
Mei Ting
Sun Lu
Yoon Soon Fatt
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