Skip to main content Accessibility help
×
Home

Chemical Modification of Surface Steps on SI(111) Vicinal Wafers: a Bonding Model for Phase Changes in Second Harmonic Generation

  • Z. Jing (a1), G. Lucovsky (a1) and J. L. Whitten (a2)

Abstract

There have been several studies of second harmonic generation (SHG) from chemically-modified vicinal Si(111) wafers. The SH fields contain one-fold (ψ) and three-fold (3ψ) symmetry contributions, which originate respectively from the terrace and surface step atoms. The phase of these contributions are different for native oxides, and are a function of the frequency of the incident radiation, ω. To identify the origin of these different phases for the terrace and step SH fields, we use a classical anharmonic oscillator model based on two assumptions: (a) a significant fraction of Si atoms at the steps have dangling bonds when oxides are formed below ∼850°C, and (b) these step atoms are linked to atoms at the bottom of the steps by O-Si-O groups following annealing at >900°C.

Copyright

References

Hide All
1 van Hasselt, C. W., Verheijen, M. A. and Rasing, Th., Phys. Rev. B, 42, 9263 (1990).
2 Hollering, R. W., Dijkkamp, D. and Elswijk, H. B., Surf. Sci. 243, 121 (1991).
3 Verheijen, M. A., van Hasselt, C. W. and Rasing, Th., Surf. Sci. 251, 467 (1991).
4 Hollering, R. W., and Barmentlo, M., Optics Communications, 88, 141 (1992).
5 Bjorkman, C. H., Lee, D. R., and Lucovsky, G., MRS Symp. Proc. 202, 271 (1991).
6 Emmerichs, U., Meyer, C., Leo, K., Kurz, H., Bjorkman, C. H., Shearon, C. E. Jr., Ma, Y., Yasuda, T., and Lucovsky, G., MRS Symp. Proc. 281 (in press).
7 Bjorkman, C. H., Shearon, C. E. Jr., Ma, Y., Yasuda, T., Lucovsky, G., Emmerichs, U., Meyer, C., Leo, K., and Kurz, H., J. Vac. Sci. Technol. A11, 1993, accepted.
8 Bloembergen, N., Nonlinear Optics (Benjamin, New York, 1965).
9 Daum, W., Krause, H.-J., Reichel, U., and Ibach, H., unpublished.
10 Jing, Z., Lucovsky, G. and Whitten, J. L., unpublished.

Chemical Modification of Surface Steps on SI(111) Vicinal Wafers: a Bonding Model for Phase Changes in Second Harmonic Generation

  • Z. Jing (a1), G. Lucovsky (a1) and J. L. Whitten (a2)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed