How compressible is recombinant battery separator mat?

Amplification of evanescent waves in a lossy left-handed material slab

“…The peaks at the two surfaces of the LHM slabs and their shapes, shown in Figure 1(a) and 2(a), clearly illustrate the presence of SPs and emphasize their important roles in the systems. We believe that the coupled SPs, excited by the evanescent waves at the two surfaces of the LHM slab, are responsible for the amplification observed [11,13,23]. To prove this, we show that the features revealed by our numerical results are consistent with the predictions of a simple model of the interaction between the evanescent wave and the coupled SPs.…”

Analytical solution of the almost-perfect-lens problem

“…It is immediately obvious that this argument poses a problem since physically sound solutions cannot grow away from the interface. As indicated by Haldane 22 and others, [23][24][25] the absence of a well-behaved solution is due to resonant excitation of surface plasmons or, more generally, polaritons causing the field to become infinitely large at ⑀ϭϪ1 ͑this problem does not affect the far field͒. The dispersion of these modes obeys / 0 ϭϪ⑀ 28,29 and, thus, the frequency at which ⑀ϭϪ1 is always the solution for q→Ϯϱ where the density of states diverges.…”

“…Following Pendry's work 5 and the experimental demonstration of negative refraction at microwave frequencies, 7 LH substances have attracted a great deal of interest along with some contention. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] While recent experiments 26,27 have put to rest concerns regarding the far field behavior of negativerefraction slabs, the question of near-field focusing has remained highly controversial. [17][18][19][20][21][22][23][24][25] In this letter, we provide an analytical answer to this problem.…”

“…We a͒ observe that this singularity can be avoided by adding a dissipative term, and that other approaches for introducing a q cutoff have been proposed. 22,23 The considerations for a single boundary can be easily extended to two interfaces and, in particular, for a negativerefraction slab occupying the region 0ϽzϽd and sandwiched by vacuum. With the source, as previous, at zϭϪᐉ and provided dϾᐉ, it can be shown that there are now two far-field images which are aberration free for ⑀ϭϭϪ1.…”

Universal Features of the Time Evolution of Evanescent Modes in a Left-Handed Perfect Lens

“…In addition to its genuine conceptual importance, this proposal has attracted much attention due to the practical realization of man-made materials expected to be left-handed [3], where negative refraction has been claimed to be observed [4]. The challenge to conventional ideas conveyed in Pendry's work has fueled a heated debate that has contributed to sharpen the issue, if not to settle it [5,6,7,8].…”