Delocalized and stationary slow Bloch mode (SBM) or slow light given rise near the flat band of 2D photonic crystal (PC) is considered as a wonderful candidate to enhance Purcell factor, various non-linear effects and to design low-threshold laser for nano-photonic components. Using Near-field Scanning Optical Microscopy (NSOM) with bowtie nano-aperture antenna probe, evanescent components of these modes with spatial resolution below the diffraction limit were revealed. It also proved the far-field and near-field images of the modes at surface of PCs are different and near-field results yield...