@ARTICLE {6514, author={M. G. Silveirinha and N. Engheta}, doi={10.1103/PhysRevB.85.085116}, journal={Physical Review B - Condensed Matter and Materials Physics}, title={Sampling and squeezing electromagnetic waves through subwavelength ultranarrow regions or openings}, year={2012}, month={February}, volume={85}, number={085116}, pages={1-18}, ISSN={2469-9950} }