Spectral analysis of strongly enhanced visible light transmission through single C-shaped nanoapertures

Matteo, J. A.; Fromm, D. P.; Yuen, Y.; Schuck, P. J.; Moerner, W. E.; Hesselink, L.
July 2004
Applied Physics Letters;7/26/2004, Vol. 85 Issue 4, p648
Academic Journal
We designed, fabricated, and characterized single C-shaped apertures in an Au film, resonant in the visible regime. Our C-shaped apertures showed transmission enhancement of 13–22 times over a square aperture of the same area and suggest as high as 106 enhancement over square apertures that are designed to produce the same near-field spot size. Spectra from individual apertures demonstrate the ability to tune this resonance over 70 nm by scaling the dimensions of the apertures. This shows the C aperture to be a versatile tool for gaining high-resolution, enhanced transmission through single subwavelength apertures at optical wavelengths.


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