Scanning near-field optical microscopy is used for analyzing both the inter
action of light with mesostructures and the capability of wave transfer bet
ween two macrowaveguides coupled by a matrix of periodic mesostructures. A
spectral analysis shows the influence of the wavelength in such a configura
tion. (C) 2000 American Institute of Physics. [S0021-8979(00)01701-1].