Аннотация:It has been experimentally shown that in near- and mid-IR-wave bands, the transmittance of 17 nm silver layer deposited onto a lavsan film with an irregular system of small holes is two to six times higher than that of the same layer deposited onto a uniform lavsan film. The effect is of a broadband type covering the wave range of 1500--5000 nm. The study of system's microstructure with the help of AFM and electronic microscope shows that the silver film is corrugated with the same system of holes as the lavsan substrate is. The evaluation made within the frames of physical optics approximation has shown that due to smallness of holes' diameter (200 nm), the additional transmittance through the holes is much less than the observed effect. A supposed mechanism of extraordinary light transmittance is discussed.
