Transporting an Image through a Subwavelength Hole.
The manipulation of optical waves in the subwavelength scale is limited by diffraction. In the vicinity of a narrow aperture, the amplitude of the electric field is approximately uniform and the transmissivity is extremely low. Here we show that despite these fundamental constraints it may be possible to transport and redirect a complex electromagnetic image through a tiny subwavelength hole with diameter considerably smaller than the diameter of the image, without losing the subwavelength details. The proposed concepts hold promise for an unprecedented manipulation of the electromagnetic and optical fields in the nanoscale with potential applications in imaging and sensing.
Silveirinha
Mário G
MG
University of Pennsylvania, Department of Electrical and Systems Engineering, Philadelphia, Pennsylvania, USA. mario.silveirinha@co.it.pt
Engheta
Nader
N