Diffraction Grating Characterization Using Multiple-wavelength Excitation of Surface Plasmon Polaritons
- 1 June 1995
- journal article
- research article
- Published by Taylor & Francis in Journal of Modern Optics
- Vol. 42 (6) , 1343-1349
- https://doi.org/10.1080/09500349514551161
Abstract
In this work we have used the optical excitation of surface plasmon polaritons to characterize the profile of a diffraction grating with a large groove-depth-to-pitch ratio at wavelengths spanning the visible spectrum. This provides us with confirmation of the accuracy of the modelling theory used to predict the optical response of a deep grating. In addition it draws attention to a particular wavelength regime which proves sensitive to the higher harmonics of the grating profile.Keywords
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