Anomalous light transmission from plasmonic-capped nanoapertures. 
We report an anomalous light transmission phenomenon for a nanoaperture on an opaque screen when the aperture is covered with an opaque cap.  In conventional optics, light transmission must decrease when the aperture is capped.  However, we found that light transmission is enhanced when the nanodisk is in close proximity to the aperture at a wavelength close to the plasmon resonance.  This effect even occurs when the disk is larger than the aperture.