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Observation of Pulsed Laser – Induced Melting of Solid Surfaces by Optical Spin Orientation

Published online by Cambridge University Press:  25 February 2011

A. Vaterlaus ,
M. Lutz ,
D. Guarisco ,
M. Aeschlimann ,
M. Stampanoni  and
F. Meier
A. Vaterlaus
Affiliation:
Laboratorium für Festkörperphysik, ETH Hönggerberg, 80 93 Zürich, Switzerland
M. Lutz
Affiliation:
Laboratorium für Festkörperphysik, ETH Hönggerberg, 80 93 Zürich, Switzerland
D. Guarisco
Affiliation:
Laboratorium für Festkörperphysik, ETH Hönggerberg, 80 93 Zürich, Switzerland
M. Aeschlimann
Affiliation:
Laboratorium für Festkörperphysik, ETH Hönggerberg, 80 93 Zürich, Switzerland
M. Stampanoni
Affiliation:
Laboratorium für Festkörperphysik, ETH Hönggerberg, 80 93 Zürich, Switzerland
F. Meier
Affiliation:
Laboratorium für Festkörperphysik, ETH Hönggerberg, 80 93 Zürich, Switzerland
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Abstract

The optically induced spin polarization P of the photoelectrons emitted from tin and germanium during ps and ns laser pulses is measured as a function of the pulse energy. P is defined by the lattice symmetry of the sample. It vanishes for amorphous or molten surfaces. The melting of the metal and the semiconductor is found to occur on a time scale which is short compared to the duration of a 70 ps laser pulse. The emission of positive ions starts at the laser intensity for which the drop of the polarization is observed. If Ge is heated with ns laser pulses a temperature dependent shift of the work function causes a decrease of the spin polarization for laser energies far below the energy necessary for melting. With ps laser pulses the polarization only vanishes for pulse energies exceeding Eion- The difference between the ps and ns measurements on Ge points to an unexpected dynamical behavior of the work function shift in semiconductors.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 157: Symposium A – Beam-Solid Interactions: Physical Phenomena , 1989 , 377
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

1 Campagna, M., Pierce, D. T., Meier, F., Sattler, K., and Siegmann, H. C., Adv. Electron. Electron Phys. 41, 113 (1976)Google Scholar
2 Bona, G. L., Meier, F., Schönhense, G., Aeschlimann, M., Stampanoni, M., Zampieri, G., and Siegmann, H. C., Phys. Rev. B, 34, 7784 (1986).Google Scholar
3 Bona, G. L., Ph. D. Dissertation, ETH Zürich, no. 8251, 1987 (unpublished). M. Aeschlimann, Ph. D. Dissertation, ETH Zürich, no. 8863, 1989 (unpublished).Google Scholar
4 Meier, F. and Pescia, D., in Optical Orientation, edited by Meier, F. and Zakharchenya, B. P. (North-Holland, Amsterdam, 1984), p. 295.Google Scholar
5 Allenspach, R., Meier, F., and Pescia, D., Appl. Phys. Lett. 44, 1107 (1984).Google Scholar
6 Fujimoto, J. G., Liu, J. M., Ippen, E. P. and Bloembergen, N., Rev. Lett. 53, 1837 (1984).Google Scholar
7 Elsayed-Ali, H. E., Norris, T. B., Pessot, M. A., and Mourou, G.A., Phys. Rev. Lett. 58, 1212 (1987).Google Scholar
8 Schoenlein, R.W., Lin, W. Z., Fujimoto, J. G., and Eesley, G.L., Phys. Rev. Lett. 58, 1680 (1987).Google Scholar
9 Hicks, J.M., Urbach, L. E., Plummer, E. W., and Dai, Hai-Lung, Rev. Lett. 61, 2588 (1988).Google Scholar
10 Corkum, P.B., Brunei, F., Sherman, N. K., and Srinivasan-Rao, T., Phys. Rev. Lett. 61, 2886 (1988).Google Scholar
11 Malvezzi, A. M., Liu, J. M., and Bloembergen, N., Appl. Phys. Lett. 45, 1019 (1984).Google Scholar
12 Fabricius, N., Hermes, P., von der Linde, D., Pospieszczyk, A., and Stritzker, B., in Beam-Solid Interactions and Phase Transformations, edited by Kurz, H., Olson, G. L. and Poate, J. M. (Mater. Res. Soc. Proc. 51, 1986), p.p. 219 – 223.Google Scholar
13 Fischer, T. E., Phys. Rev. Lett. 21, 31 (1968).Google Scholar
14 Spicer, W. E., Lindau, I., Skeath, P., Su, C. Y., and Chye, P., Phys. Rev. Lett. 44, 420 (1980).Google Scholar
15 Vitomirov, I. M., Waddill, G. D., Aldao, C. M., Anderson, S. G., Capasso, C., and Weaver, J. H., Phys. Rev. B, 40, 3483 (1989).Google Scholar