Utilizing the underlying physics of evanescent-wave amplification by a negative-refractive-index slab, it is shown that evanescent waves with specific spatial frequencies can also be amplified without any reflection simply by two dielectric planar waveguides. The simple configuration allows one to take advantage of the high resolution limit of a high-refractive-index material without contact with the object.
© 2006 Optical Society of America
Original Manuscript: September 3, 2005
Revised Manuscript: June 28, 2002
Manuscript Accepted: June 7, 2006
Published: August 25, 2006
Mankei Tsang and Demetri Psaltis, "Reflectionless evanescent-wave amplification by two dielectric planar waveguides," Opt. Lett. 31, 2741-2743 (2006)