Modal analysis of second-order mechanical reflections in oblique incidence grooved gratings

Modal analysis of second-order mechanical reflections in oblique incidence grooved gratings

Reflection effects in oblique incidence grooved gratings in the presence of propagating surface acoustic waves are analyzed. The particle displacements associated with these waves are described by a modal expansion including second-order evanescent and propagating bulk waves. The reflection coeffici...

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Veröffentlicht in:Journal of applied physics 1994-05, Vol.75 (9), p.4371-4381
Hauptverfasser: Robinson, H., Hahn, Y., Gau, J. N.
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Hahn, Y.
Gau, J. N.
description Reflection effects in oblique incidence grooved gratings in the presence of propagating surface acoustic waves are analyzed. The particle displacements associated with these waves are described by a modal expansion including second-order evanescent and propagating bulk waves. The reflection coefficient and velocity shift are derived to first and second order (in the overlay height) using the boundary condition matching method. It is shown that the same second-order effects predicted for normal incidence groove gratings will exist for oblique incidence groove gratings. In addition, the reflection coefficient and velocity shift behavior are examined as functions of incidence angle and metallization ratio.
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title Modal analysis of second-order mechanical reflections in oblique incidence grooved gratings
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