Sputtered SiO2 Induced Atomic Interdiffusion in Semiconductor Nano Heterostructures

Article Preview

Abstract:

We investigate the influence of sputtered silica as annealing cap on the enhancement of intermixing rate of semiconductor quantum nanostructures. After sputtered silica application and subsequent rapid thermal annealing, we observed bandgap shift of over 200 meV with respect to the bandgap of as-grown material from various GaAs-based quantum well (QW) heterostructures such as GaAs/AlGaAs, InAlGaP/GaAs, and GaAs/AlGaAs systems at significantly lower temperature than the conventional dielectric cap process with plasma enhanced chemical vapor deposition (PECVD). The results suggest that the sputtered silica process is a promising intermixing technique for the monolithic integration of multiple active/passive photonic components on GaAs-based material systems.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

33-35

Citation:

Online since:

November 2007

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2008 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] O. P. Kowalski, C. J. Hamilton, S. D. McDougall, J. H. Marsh, A. C. Bryce, R. M. De La Rue, B. Vögele, C. R. Stanley, C. C. Button and J. S. Roberts, Universal damage induced technique for quantum well intermixing, Appl. Phys. Lett., 72, pp.581-583 (1998).

DOI: 10.1063/1.120765

Google Scholar

[2] A. C. Bryce, J. H. Marsh, D. A. Yanson, O. P. Kowalski and S. S. Kim, Selective quantum dot intermixing for photonic devices, 5th IEEE Conference on Nanotechnology, 1, pp.386-389 (2005).

DOI: 10.1109/nano.2005.1500777

Google Scholar

[3] B. S. Ooi, K. McIlvaney, M. W. Street, A. S. Helmy, S. G. Ayling, A. C. Bryce, J. H. Marsh and J. S. Roberts, Selective quantum-well intermixing in GaAs-AlGaAs structures using impurityfree vacancy diffusion, IEEE J. Quantum Electronics, 33, pp.1784-1793 (1997).

DOI: 10.1109/3.631284

Google Scholar

[4] B. S. Ooi, A. C. Bryce, J. H. Marsh, and J. S. Roberts, Effect of p and n doping on neutral impurity and SiO2 dielectric cap induced quantum well intermixing in GaAs/AlGaAs structures, Semicond. Sci. Technol., 12, pp.121-127 (1997).

DOI: 10.1088/0268-1242/12/1/020

Google Scholar