Increased cut-off wavelength for a subwavelength hole in a real metal
Optics Express, Vol. 13, Issue 6, pp. 1933-1938 (2005)
http://dx.doi.org/10.1364/OPEX.13.001933
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Abstract
A waveguide mode of a subwavelength rectangular hole in a real metal is analyzed. Due to coupling between surface plasmons on the long edges of the hole, the cut-off wavelength increases as the hole-width is reduced. The cut-off wavelength is found to be much larger than Rayleigh’s criterion for perfect metals — 2.3 times as large for a 15 nm wide hole. The analytical results are verified by finite-difference calculations. The finite difference calculations also show the influence of including material loss.
© 2005 Optical Society of America
OCIS Codes
(230.7370) Optical devices : Waveguides
(240.6680) Optics at surfaces : Surface plasmons
ToC Category:
Research Papers
History
Original Manuscript: February 9, 2005
Revised Manuscript: March 4, 2005
Published: March 21, 2005
Citation
Reuven Gordon and Alexandre Brolo, "Increased cut-off wavelength for a subwavelength hole in a real metal," Opt. Express 13, 1933-1938 (2005)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-13-6-1933
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References
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