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Near-field Raman spectroscopy with high spatial resolution is used to study singlewalled carbon nanotubes (SWNT) within dense samples. A sharp, laser irradiated metal tip acts as a near-field excitation source causing an enhanced Raman signal within close proximity of the tip. We present optical images of different Raman modes with a spatial resolution better than 15 nm. Local spectroscopy allows us to identify and distinguish tubes with different structures on the nanometer-scale and todoi:10.1142/s0219581x04002164 fatcat:lo7uj37oh5hxvcjxwfiybcdoh4