We present theoretical modeling and experimental validation of both capacitive (dot) and inductive (hole) metallic crossed gratings in the mid-infrared (2–5 μm). The gratings are fabricated by use of interferometric lithography and modeled by use of rigorous coupled-wave analysis. Our experimental and numerical investigations of the transmittance spectra of these gratings suggest that, as in inductive grids, the behavior of capacitive grids is described by the coupling of the incident light into surface plasma waves.
© 2002 Optical Society of America
Original Manuscript: August 1, 2001
Revised Manuscript: December 10, 2001
Manuscript Accepted: December 10, 2001
Published: July 1, 2002
B. K. Minhas, W. Fan, K. Agi, S. R. J. Brueck, and K. J. Malloy, "Metallic inductive and capacitive grids: theory and experiment," J. Opt. Soc. Am. A 19, 1352-1359 (2002)