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Time-Resolved Picosecond Optical Study of Laser-Excited Graphite

Published online by Cambridge University Press:  26 February 2011

C. Y. Huang ,
A. M. Malvezzi ,
J. N. Liu  and
N. Bloembergen
C. Y. Huang
Affiliation:
Los Alamos National Laboratory, Los Alamos, NM 87545
A. M. Malvezzi
Affiliation:
Division of Applied Sciences, Harvard University, Cambridge, MA 02138
J. N. Liu
Affiliation:
GTE Laboratories, 40 Sylvan Road, Waltham, MA 02254
N. Bloembergen
Affiliation:
Division of Applied Sciences, Harvard University, Cambridge, MA 02138
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Abstract

The pump-and-probe technique is employed to perform picosecond timeresolved measurements of the reflectivity changes in highly oriented pyrolitic graphite excited by 0.532-μm pump pulses. At low pump fluences, the presence of a short-lived plasma and a high-temperature gradient gives rise to an increase in the reflectivity probed at 1.9 μm but causes a decrease at 1.064 μm. At the threshold fluence, 140 mJ/cm2, the reflectivity drops abruptly, marking a phase transformation. Above the threshold, the reflectivity drops to -0.2 from its original value of 0.42 at 1.064 μm and to -0.4 from its ambient value of 0.50 at 1.9 μm. This new phase persists only for a few nanoseconds.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 51: Symposium A – Beam-Solid Interactions and Phase Transformations , 1985 , 245
Copyright
Copyright © Materials Research Society 1985

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References

REFERENCES

1. Lummer, O., Verflussigung der Kohle und Hertellung der Sonnentemperatur, Druck, and Friedr, Verlag von. Vieweg and Sohn, Brunschweg, 1914.CrossRefGoogle Scholar
2. Ryschkewitsch, E., Z. Electrochem. 27, 445 (1921).Google Scholar
3. Whittaker, A. G., Kintner, P. L., Nelson, L. S. and Richardson, N., Aerospace Corp. Rept., SD–TR–81–60, 1981. See also A. G. Whittaker and P.L. Kintner, Carbon 23, 255 (1985).Google Scholar
4. Venkatesan, T., Jacobson, D. C., Gibson, J. M., Elman, B. S., Braunstein, G., Dresselhaus, M. S., and Dresselhaus, G., Phys. REv. Lett. 53, 360 (1984).Google Scholar
5. Liu, J. M., Yen, R., Kurz, H., and Bloembergen, N., Appl. Phys. Lett. 39, 755 (1981).Google Scholar
6. Liu, J. M., Kurtz, H., and Bloembergen, N., Appl. Phys. Lett. 41, 643 (1982).Google Scholar
7. Johnson, L. G. and Dresselhaus, G., Phys. Rev. B 7, 2275 (1973) and references therein.CrossRefGoogle Scholar
8. Hove, J. E., in Industrial Carbon and Graphite (Soc. Chem. Ind., London (1958).Google Scholar
9. Bundy, F. P., J. Chem. Phys. 38, 618 (1963), and references therein.CrossRefGoogle Scholar
10. Steinbeck, J, Braustein, G., Dresselhaus, M. S., Elman, B. S. and Venkatesan, T., Mat. Res. Soc. Symp. Proc. 35, 219 (1985).Google Scholar