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Electromagnetically-Induced Surface Microstructures and Enhanced Field Effects in Laser Processing*

Published online by Cambridge University Press:  21 February 2011

S. R. J. Brueck,
D. J. Ehrlich,
D. V. Murphy and
J. Y. Tsao
S. R. J. Brueck
Affiliation:
Lincoln Laboratory, Massachusetts Institute of Technology Lexington, Massachusetts 02173
D. J. Ehrlich
Affiliation:
Lincoln Laboratory, Massachusetts Institute of Technology Lexington, Massachusetts 02173
D. V. Murphy
Affiliation:
Lincoln Laboratory, Massachusetts Institute of Technology Lexington, Massachusetts 02173
J. Y. Tsao
Affiliation:
Lincoln Laboratory, Massachusetts Institute of Technology Lexington, Massachusetts 02173
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Abstract

The presence of microstructures on surfaces undergoing laser processing modifies the electromagnetic boundary conditions and can lead to dramatic changes in the intensity of the local electromagnetic fields and hence in the reaction rates and final morphologies resulting from the laser reaction. Examples are presented for periodic structures on planar surfaces — the rippling of Ag surfaces during laser oxidation; and for isolated dielectric structures — enhanced scattering (∼ 100x) due to dipolar resonances in Si particles.

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Footnotes

*

This work was supported by the Department of the Air Force, in part with specific support from the Air Force Office of Scientific Research, by the Defense Advanced Research Projects Agency, and by the Army Research Office.

References

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