Optical transmission through double-layer metallic subwavelength slit arrays
Optics Letters, Vol. 31, Issue 4, pp. 516-518 (2006)
http://dx.doi.org/10.1364/OL.31.000516
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Abstract
We present measurements of transmission of infrared radiation through double-layer metallic grating structures. Each metal layer contains an array of subwavelength slits and supports transmission resonance in the absence of the other layer. The two metal layers are fabricated in close proximity to allow coupling of the evanescent field on individual layers. The transmission of the double layer is found to be surprisingly large at particular wavelengths, even when no direct line of sight exists through the structure as a result of the lateral shifts between the two layers. We perform numerical simulations using rigorous coupled wave analysis to explain the strong dependence of the peak transmission on the lateral shift between the metal layers.
© 2006 Optical Society of America
OCIS Codes
(050.2770) Diffraction and gratings : Gratings
(230.1950) Optical devices : Diffraction gratings
(230.3990) Optical devices : Micro-optical devices
(240.6680) Optics at surfaces : Surface plasmons
ToC Category:
Physical Optics
History
Original Manuscript: September 16, 2005
Manuscript Accepted: November 12, 2005
Citation
H. B. Chan, Z. Marcet, Kwangje Woo, D. B. Tanner, D. W. Carr, J. E. Bower, R. A. Cirelli, E. Ferry, F. Klemens, J. Miner, C. S. Pai, and J. A. Taylor, "Optical transmission through double-layer metallic subwavelength slit arrays," Opt. Lett. 31, 516-518 (2006)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-31-4-516
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