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Direct measurement of the inter-diffusion in quantum wells enhanced by group V intermixing for InP- based structures

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3 Author(s)
Hulko, O. ; McMaster Univ., Hamilton ; Thompson, D.A. ; Simmons, J.G.

Group V inter-diffusion in InGaAsP/InP quantum wells (QW) has been studied using analytical electron microscopy in the temperature range of 600-850degC. The structure was grown by metalorganic chemical vapour deposition (MOCVD) and subsequently capped with a 100 nm thick layer of SiO2, Si3N4 or low temperature molecular beam epitaxy (MBE)-grown InP (LT-InP). Diffusion coefficients for the group V species were calculated from the width-concentration profiles and activation energies (Ealpha) together with diffusivity (D0) were obtained from Arrhenius plots. Small as-grown compositional difference between quantum well and barriers (~6%) in group III prevents us from accurate analysis of ln-Ga interdiffusion.

Published in:

Optoelectronic and Microelectronic Materials and Devices, 2006 Conference on

Date of Conference:

6-8 Dec. 2006

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